STA321MP Scalable digital microphone processor Datasheet - production data Description TQFP - 64 10 mm x 10 mm VFQFPN - 56 8 mm x 8 mm Features 8 digital processing channels each 24-bit - 6 channels of PDM input - 2 additional virtual channels >100 dB SNR and dynamic range Digital gain/attenuation +58 dB to -100 dB in 0.5 dB steps Soft volume update Individual channel and master level control Up to 10 independent 32-bit userprogrammable biquads (EQ) per channel Bass/treble tone control Pre- and post-EQ full 8-channel input mix on all 8 channels Dual independent limiters/compressors Dynamic range compression or anti-clipping modes Individual channel and master soft/hard mute The STA321MP is a PDM high-performance multichannel processor with ultra-low quiescent current designed for general-purpose digital microphone applications. The device is fully digital and is comprised of three main sections. The first section is the PDM input interface which can accept up to six serial digital inputs. The second section is a high-quality audio processor allowing flexible channel mixing/muxing and provides up to 10 biquads for general sound equalization and voice enhancement with independent volume control. The last block is the IS output interface which streams out the processed digital audio. The output interface can also be programmed for flexible channel mapping. The device offers some of the most commonly required audio enhancements such as programmable voice tuning and equalization, limiter/compressor for improved voice quality, multiband selection for customizable microphone usage and configurable wind-noise rejection. The embedded digital processor allows offloading the microphone processing from the main CPU or SoC, moving it to the device. The STA321MP has six digital microphone inputs, providing connections for up to three dualmembrane microphones. 3 IS data outputs IS data output channel mapping function Independent channel volume and DSP bypass Channel mapping of any input to any processing channel Applications Table 1. Device summary Order code Package Packaging STA321MPLTR TQFP64 Tape and reel STA321MPL TQFP64 Tray STA321MPTR VFQFPN56 Tape and reel STA321MP VFQFPN56 Tray Tablets Gaming Audio conference sets Legacy microphone-equipped devices September 2013 This is information on a product in full production. DocID022647 Rev 5 1/84 www.st.com 84 Contents STA321MP Contents 1 2 3 4 Device overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 2.3 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 2.4 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Microphone interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.1 PDM clock generator (for microphones) . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.2 PDM resampling interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.3 PDM recombination (dual-membrane microphone support) . . . . . . . . . . 15 3.4 Low-pass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.5 Sensitivity adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.6 Normal channel attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.7 Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 I2C bus operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.1 4.1.1 Data transition or change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.1.2 Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.1.3 Stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.1.4 Data input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.2 Device addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.3 Write operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.4 2/84 Communication protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.3.1 Byte write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.3.2 Multi-byte write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Read operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.4.1 Current address byte read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.4.2 Current address multi-byte read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.4.3 Random address byte read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 DocID022647 Rev 5 STA321MP Contents 4.4.4 5 Random address multi-byte read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.1 Register summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.2 Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.2.1 Configuration register A (0x00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.2.2 Configuration register C (0x02) - serial output formats . . . . . . . . . . . . . 26 5.2.3 Configuration register D (0x03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 5.2.4 Configuration register E (0x04) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 5.2.5 Configuration register F (0x05) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 5.2.6 Configuration register G (0x06) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 5.2.7 Configuration register H (0x07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 5.2.8 Configuration register I (0x08) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 5.2.9 Master mute register (0x09) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.2.10 Master volume register (0x0A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.2.11 Channel 1 volume (0x0B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.2.12 Channel 2 volume (0x0C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.2.13 Channel 3 volume (0x0D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.2.14 Channel 4 volume (0x0E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.2.15 Channel 5 volume (0x0F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 5.2.16 Channel 6 volume (0x10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 5.2.17 Channel 7 volume (0x11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 5.2.18 Channel 8 volume (0x12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 5.2.19 Channel 1 volume trim, mute, bypass (0x13) . . . . . . . . . . . . . . . . . . . . 35 5.2.20 Channel 2 volume trim, mute, bypass (0x14) . . . . . . . . . . . . . . . . . . . . 35 5.2.21 Channel 3 volume trim, mute, bypass (0x15) . . . . . . . . . . . . . . . . . . . . 35 5.2.22 Channel 4 volume trim, mute, bypass (0x16) . . . . . . . . . . . . . . . . . . . . 36 5.2.23 Channel 5 volume trim, mute, bypass (0x17) . . . . . . . . . . . . . . . . . . . . 36 5.2.24 Channel 6 volume trim, mute, bypass (0x18) . . . . . . . . . . . . . . . . . . . . 36 5.2.25 Channel 7 volume trim, mute, bypass (0x19) . . . . . . . . . . . . . . . . . . . . 36 5.2.26 Channel 8 volume trim, mute, bypass (0x1A) . . . . . . . . . . . . . . . . . . . . 36 5.2.27 Fine volume (FineVol) (0x5B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 5.2.28 Channel input mapping channels 1 and 2 (0x1B) . . . . . . . . . . . . . . . . . 38 5.2.29 Channel input mapping channels 3 and 4 (0x1C) . . . . . . . . . . . . . . . . . 38 5.2.30 Channel input mapping channels 5 and 6 (0x1D) . . . . . . . . . . . . . . . . . 38 5.2.31 Channel input mapping channels 7 and 8 (0x1E) . . . . . . . . . . . . . . . . . 38 5.2.32 AGEQ - graphic EQ 80-Hz band (0x23) . . . . . . . . . . . . . . . . . . . . . . . . 39 5.2.33 BGEQ - graphic EQ 300-Hz band (0x24) . . . . . . . . . . . . . . . . . . . . . . . 39 DocID022647 Rev 5 3/84 Contents STA321MP 5.3 4/84 5.2.34 CGEQ - graphic EQ 1-kHz band (0x25) . . . . . . . . . . . . . . . . . . . . . . . . 39 5.2.35 DGEQ - graphic EQ 3-kHz band (0x26) . . . . . . . . . . . . . . . . . . . . . . . . 39 5.2.36 EGEQ - graphic EQ 8-kHz band (0x27) . . . . . . . . . . . . . . . . . . . . . . . . . 40 5.2.37 Biquad internal channel loop-through (0x28) . . . . . . . . . . . . . . . . . . . . . 40 5.2.38 Mix internal channel loop-through (0x29) . . . . . . . . . . . . . . . . . . . . . . . 41 5.2.39 EQ bypass (0x2A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 5.2.40 Tone control bypass (0x2B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 5.2.41 Tone control (0x2C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 5.2.42 Channel limiter select channels 1, 2, 3, 4 (0x2D) . . . . . . . . . . . . . . . . . 42 5.2.43 Channel limiter select channels 5, 6, 7, 8 (0x2E) . . . . . . . . . . . . . . . . . 42 5.2.44 Limiter 1 attack/release rate (0x2F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 5.2.45 Limiter 1 attack/release threshold (0x30) . . . . . . . . . . . . . . . . . . . . . . . . 43 5.2.46 Limiter 2 attack/release rate (0x31) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 5.2.47 Limiter 2 attack/release threshold (0x32) . . . . . . . . . . . . . . . . . . . . . . . . 43 5.2.48 Limiter description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 5.2.49 Channel 1 and 2 output timing (0x33) . . . . . . . . . . . . . . . . . . . . . . . . . . 47 5.2.50 Channel 3 and 4 output timing (0x34) . . . . . . . . . . . . . . . . . . . . . . . . . . 47 5.2.51 Channel 5 and 6 output timing (0x35) . . . . . . . . . . . . . . . . . . . . . . . . . . 47 5.2.52 Channel 7 and 8 output timing (0x36) . . . . . . . . . . . . . . . . . . . . . . . . . . 48 5.2.53 Coefficient address register 1 (0x3B) . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 5.2.54 Coefficient address register 2 (0x3C) . . . . . . . . . . . . . . . . . . . . . . . . . . 48 5.2.55 Coefficient b1 data register, bits 23:16 (0x3D) . . . . . . . . . . . . . . . . . . . . 48 5.2.56 Coefficient b1 data register, bits 15:8 (0x3E) . . . . . . . . . . . . . . . . . . . . . 49 5.2.57 Coefficient b1 data register, bits 7:0 (0x3F) . . . . . . . . . . . . . . . . . . . . . . 49 5.2.58 Coefficient b2 data register, bits 23:16 (0x40) . . . . . . . . . . . . . . . . . . . . 49 5.2.59 Coefficient b2 data register, bits 15:8 (0x41) . . . . . . . . . . . . . . . . . . . . . 49 5.2.60 Coefficient b2 data register, bits 7:0 (0x42) . . . . . . . . . . . . . . . . . . . . . . 49 5.2.61 Coefficient a1 data register, bits 23:16 (0x43) . . . . . . . . . . . . . . . . . . . . 49 5.2.62 Coefficient a1 data register, bits 15:8 (0x44) . . . . . . . . . . . . . . . . . . . . . 49 5.2.63 Coefficient a1 data register, bits 7:0 (0x45) . . . . . . . . . . . . . . . . . . . . . . 50 5.2.64 Coefficient a2 data register, bits 23:16 (0x46) . . . . . . . . . . . . . . . . . . . . 50 5.2.65 Coefficient a2 data register, bits 15:8 (0x47) . . . . . . . . . . . . . . . . . . . . . 50 5.2.66 Coefficient a2 data register, bits 7:0 (0x48) . . . . . . . . . . . . . . . . . . . . . . 50 5.2.67 Coefficient b0 data register, bits 23:16 (0x49) . . . . . . . . . . . . . . . . . . . . 50 5.2.68 Coefficient b0 data register, bits 15:8 (0x4A) . . . . . . . . . . . . . . . . . . . . . 50 5.2.69 Coefficient b0 data register, bits 7:0 (0x4B) . . . . . . . . . . . . . . . . . . . . . . 50 5.2.70 Coefficient write control register (0x4C) . . . . . . . . . . . . . . . . . . . . . . . . . 51 Reading a coefficient from RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 DocID022647 Rev 5 STA321MP 6 Contents 5.4 Reading a set of coefficients from RAM . . . . . . . . . . . . . . . . . . . . . . . . . . 52 5.5 Writing a single coefficient to RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 5.6 Writing a set of coefficients to RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Configuration registers (0x77; 0x78; 0x79) . . . . . . . . . . . . . . . . . . . . . . 54 6.1 Post-scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 6.2 Variable max power correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 6.2.1 6.3 Variable distortion compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 6.3.1 6.4 6.5 7 MPCC1-2 (0x4D, 0x4E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 DCC1-2 (0x4F, 0x50) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 PSCorrect registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 6.4.1 PSC1-2: ripple correction value (RCV) (0x51, 0x52) . . . . . . . . . . . . . . . 59 6.4.2 PSC3: correction normalization value (CNV) (0x53) . . . . . . . . . . . . . . . 59 PDM and recombination IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 6.5.1 Mike recombination RAM BIST (0x5C) . . . . . . . . . . . . . . . . . . . . . . . . . 59 6.5.2 Recombination control register 1 (0x5D) . . . . . . . . . . . . . . . . . . . . . . . . 60 6.5.3 PDM control register (0x5E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 6.5.4 Recombination control register 2, 3 and 4 (0x5F; 0x60; 0x61) . . . . . . . 61 6.5.5 Recombination control register 5, 6 and 7 (0x62; 0x63; 0x64) . . . . . . . 63 6.5.6 Recombination control register 8, 9 and 10 (0x65; 0x66; 0x67) . . . . . . 65 6.5.7 Recombination control register 11, 12 and 13 (0x68; 0x69; 0x6A) . . . . 66 6.5.8 Zero-mute threshold/hysteresis and RMS zero-mute selectors (0x6F) . 67 6.5.9 RMS post-processing selectors and Fs autodetection (0x70) . . . . . . . . 69 6.5.10 Clock manager configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 6.5.11 RMS level registers (0x7A, 0x7B, 0x7C, 0x7D) . . . . . . . . . . . . . . . . . . . 72 Startup/shutdown pop noise removal . . . . . . . . . . . . . . . . . . . . . . . . . . 75 7.1 DPT: PWM and tristate delay (0x80) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 7.2 Configuration register (0x81) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 7.3 User-defined delay time (0x82) and (0x83) . . . . . . . . . . . . . . . . . . . . . . . 76 8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 DocID022647 Rev 5 5/84 List of tables STA321MP List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. Table 17. Table 18. Table 19. Table 20. Table 21. Table 22. 6/84 Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Pin description STA321MPL (TQFP64) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Pin description: STA321MP (VFQFPN56) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 General interface electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 DC electrical characteristics: 3.3-V buffers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Modes for PDM resampling interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Register summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Serial audio output formats according to sampling rate . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 RAM block for biquads, mixing, and bass management. . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Gain adjustment (sensitivity). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Normal channel attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Threshold configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 RMS channel select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 Zero-detect threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Zero-detect hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 RMS post-processing channel select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 VFQFPN56 (8 x 8 mm) package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Exposed pad variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 DocID022647 Rev 5 STA321MP List of figures List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Channel signal flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Pin connections STA321MPL - TQFP64 (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Pin connections STA321MP - VFQFPN56 (top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 PDM clock generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 PDM recombination block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Write mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Read mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Basic limiter and volume flow diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Biquad filter structure with quantization error noise shaping . . . . . . . . . . . . . . . . . . . . . . . 58 Channel mixer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 TQFP64 (10 x 10 mm) package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 VFQFPN56 (8 x 8 mm) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 DocID022647 Rev 5 7/84 Device overview STA321MP 1 Device overview 1.1 Block diagram Figure 1. Block diagram SA SCL SDA XTI CKOUT O U T1 A /B I2C PLL O U T2 A /B O U T3 A /B FFX SYSTEM CONTROL SYSTEM TIMING O U T4 A /B O U T5 A /B O U T6 A /B OVERSAMPLING O U T7 A /B LRCKO PDM1 PDM2 PDM3 PDM4 PDM5 PDM6 B IC K O SERIAL DATA IN CHANNEL MAPPING TREBLE BASS,EQ (BIQUADS) VOLUME LIMITING Figure 2. Channel signal flow 8/84 DocID022647 Rev 5 SERIAL DATA OUT SDO 12 SDO 34 SDO 56 SDO 78 STA321MP 1.2 Device overview Pin description Figure 3. Pin connections STA321MPL - TQFP64 (top view) DocID022647 Rev 5 9/84 Device overview STA321MP Table 2. Pin description STA321MPL (TQFP64) Pin number Type Name 1 5-V tolerant TTL input buffer PDM_CLK PDM I/F CLK 6 5-V tolerant TTL input buffer PDMIN_6 PDM input channel 6 7 5-V tolerant TTL input buffer PDMIN_5 PDM input channel 5 8 5-V tolerant TTL input buffer PDMIN_4 PDM input channel 4 9 5-V tolerant TTL input buffer PDMIN_3 PDM input channel 3 10 5-V tolerant TTL input buffer PDMIN_2 PDM input channel 2 11 5-V tolerant TTL input buffer PDMIN_1 PDM input channel 1 15 5-V tolerant TTL Schmitt trigger input buffer RESETN Global reset 16 CMOS input buffer with pull-down PLLB Bypass phase-locked loop 17 1.8-V CMOS input buffer with pull-down SA Select address (I2C) 18 Bidirectional buffer: 5-V tolerant TTL Schmitt trigger input; 3.3-V capable 2 mA slew-rate controlled output SDA Serial data (I2C) 19 5-V tolerant TTL Schmitt trigger input buffer SCL Serial clock (I2C) 20 5-V tolerant TTL Schmitt trigger input buffer XTI Crystal oscillator input (clock input) N.C. Not connected GND PLL ground 21 10/84 Description 23 Analog ground 25 3.3-V capable TTL tristate 4 mA output buffer CKOUT Clock output 29 3.3-V capable TTL 2 mA output buffer OUT8B PWM channel 8 output B 30 3.3-V capable TTL 2 mA output buffer OUT8A PWM channel 8 output A 31 3.3-V capable TTL 2 mA output buffer OUT7B PWM channel 7 output B 32 3.3-V capable TTL 2 mA output buffer OUT7A PWM channel 7 output A 33 3.3-V capable TTL 2 mA output buffer OUT6B PWM channel 6 output B 34 3.3-V capable TTL 2 mA output buffer OUT6A PWM channel 6 output A 38 3.3-V capable TTL 2 mA output buffer OUT5B PWM channel 5 output B 39 3.3-V capable TTL 2 mA output buffer OUT5A PWM channel 5 output A 40 3.3-V capable TTL 2 mA output buffer OUT4B PWM channel 4 output B 41 3.3-V capable TTL 2 mA output buffer OUT4A PWM channel 4 output A 42 3.3-V capable TTL 2 mA output buffer OUT3B PWM channel 3 output B 43 3.3-V capable TTL 2 mA output buffer OUT3A PWM channel 3 output A 47 3.3-V capable TTL 2 mA output buffer OUT2B PWM channel 2 output B 48 3.3-V capable TTL 2 mA output buffer OUT2A PWM channel 2 output A 49 3.3-V capable TTL 2 mA output buffer OUT1B PWM channel 1 output B 50 3.3-V capable TTL 2 mA output buffer OUT1A PWM channel 1 output A 51 3.3-V capable TTL 4 mA output buffer EAPD Ext. amp power-down DocID022647 Rev 5 STA321MP Device overview Table 2. Pin description STA321MPL (TQFP64) (continued) Pin number Type Name Description 55 3.3-V capable TTL 2 mA output buffer BICKO Output serial clock 56 3.3-V capable TTL 2 mA output buffer LRCKO Output left/right clock 57 3.3-V capable TTL 2 mA output buffer SDO_12 Output serial data channels 1 & 2 58 3.3-V capable TTL 2 mA output buffer SDO_34 Output serial data channels 3 & 4 62 3.3-V capable TTL 2 mA output buffer SDO_56 Output serial data channels 5 & 6 63 3.3-V capable TTL 2 mA output buffer SDO_78 Output serial data channels 7 & 8 64 5-V tolerant TTL Schmitt trigger input buffer PWDN Device power-down 3.3-V digital supply voltage VDD 3.3-V supply 2,4,13, 27,36, Digital ground 45,53,60 GND Ground 14,21,22,26, 37, 46, 54,61 NC 3,12,24, 28,35, 44,52,59 DocID022647 Rev 5 Not connected 11/84 Device overview STA321MP Figure 4. Pin connections STA321MP - VFQFPN56 (top view) Table 3. Pin description: STA321MP (VFQFPN56) Pin number 1 Type Name 5-V tolerant TTL input buffer 2 PDM_CLK PDM I/F CLK RES Reserved connect to GND 5 5-V tolerant TTL input buffer PDMIN_6 PDM input channel 6 6 5-V tolerant TTL input buffer PDMIN_5 PDM input channel 5 7 5-V tolerant TTL input buffer PDMIN_4 PDM input channel 4 8 5-V tolerant TTL input buffer PDMIN_3 PDM input channel 3 9 5-V tolerant TTL input buffer PDMIN_2 PDM input channel 2 10 5-V tolerant TTL input buffer PDMIN_1 PDM input channel 1 13 5-V tolerant TTL Schmitt trigger input buffer RESETN Global reset RES Reserved connect to GND SA Select address (I2C) 14 15 12/84 Description 1.8-V CMOS input buffer with pull-down DocID022647 Rev 5 STA321MP Device overview Table 3. Pin description: STA321MP (VFQFPN56) (continued) Pin number Type Name Description 16 Bidirectional buffer: 5-V tolerant TTL Schmitt trigger input; 3.3-V capable 2 mA slew-rate controlled output SDA Serial data (I2C) 17 5-V tolerant TTL Schmitt trigger input buffer SCL Serial clock (I2C) 18 5-V tolerant TTL Schmitt trigger input buffer XTI Crystal oscillator input (clock input) N.C. Not connected 19 20 Analog ground GNDA PLL ground 22 3.3-V capable TTL tristate 4 mA output buffer CKOUT Clock output 25 3.3-V capable TTL 2 mA output buffer OUT8B PWM channel 8 output B 26 3.3-V capable TTL 2 mA output buffer OUT8A PWM channel 8 output A 27 3.3-V capable TTL 2 mA output buffer OUT7B PWM channel 7 output B 28 3.3-V capable TTL 2 mA output buffer OUT7A PWM channel 7 output A 29 3.3-V capable TTL 2 mA output buffer OUT6B PWM channel 6 output B 30 3.3-V capable TTL 2 mA output buffer OUT6A PWM channel 6 output A 33 3.3-V capable TTL 2 mA output buffer OUT5B PWM channel 5 output B 34 3.3-V capable TTL 2 mA output buffer OUT5A PWM channel 5 output A 35 3.3-V capable TTL 2 mA output buffer OUT4B PWM channel 4 output B 36 3.3-V capable TTL 2 mA output buffer OUT4A PWM channel 4 output A 37 3.3-V capable TTL 2 mA output buffer OUT3B PWM channel 3 output B 38 3.3-V capable TTL 2 mA output buffer OUT3A PWM channel 3 output A 41 3.3-V capable TTL 2 mA output buffer OUT2B PWM channel 2 output B 42 3.3-V capable TTL 2 mA output buffer OUT2A PWM channel 2 output A 43 3.3-V capable TTL 2 mA output buffer OUT1B PWM channel 1 output B 44 3.3-V capable TTL 2 mA output buffer OUT1A PWM channel 1 output A 45 3.3-V capable TTL 4 mA output buffer EAPD Ext. amp power-down 48 3.3-V capable TTL 2 mA output buffer BICKO Output serial clock 49 3.3-V capable TTL 2 mA output buffer LRCKO Output left/right clock 50 3.3-V capable TTL 2 mA output buffer SDO_12 Output serial data channels 1 & 2 51 3.3-V capable TTL 2 mA output buffer SDO_34 Output serial data channels 3 & 4 54 3.3-V capable TTL 2 mA output buffer SDO_56 Output serial data channels 5 & 6 55 3.3-V capable TTL 2 mA output buffer SDO_78 Output serial data channels 7 & 8 56 5-V tolerant TTL Schmitt trigger input buffer PWDN Device power-down 3,11,21,24, 31,39,46,52 3.3-V digital supply voltage VDD 3.3-V supply 4,12,23,32, 40,47,53 Digital ground GND Ground DocID022647 Rev 5 13/84 Electrical characteristics STA321MP 2 Electrical characteristics 2.1 Absolute maximum ratings Table 4. Absolute maximum ratings Symbol 2.2 Parameter Min Typ Max Unit VDD 3.3-V I/O power supply -0.5 4 V VSA Voltage on SA pin 15 (pin 17 in TQFP-64) -0.5 2 V Vi Voltage on input pins -0.5 VDD + 0.5 V Vo Voltage on output pins -0.5 VDD + 0.3 V Tstg Storage temperature -40 150 C Tamb Ambient operating temperature -40 90 C Thermal data Table 5. Thermal data Symbol Rthj-amb 2.3 Parameter Min Thermal resistance, junction to ambient Typ Max 85 Unit C/W Recommended operating conditions Table 6. Recommended operating conditions Symbol 14/84 Parameter Min Typ Max VDD I/O power supply 3.0 3.3 3.6 VSA Voltage on SA pin 15 (STA321MP), pin 17 (STA321MPL) 1.55 1.8 1.95 Tj Operating junction temperature -40 25 125 DocID022647 Rev 5 Unit V C STA321MP 2.4 Electrical characteristics Electrical specifications The following specifications are valid for VDD = 3.3 V 0.3 V, VSA = 0 V and Tamb = 25 C, unless otherwise stated. Table 7. General interface electrical specifications Symbol Parameter Conditions Min Typ Max Unit Iil Low-level input, no pull-up Vi = 0 V 1 A Iih High-level input, no pull-down Vi = VDD 2 A IOZ Tristate output leakage without pull-up/down Vi = VDD 2 A Vesd Electrostatic protection (human body model) Leakage < 1 A 2000 V Table 8. DC electrical characteristics: 3.3-V buffers Symbol Parameter Conditions Min Typ Max Unit 0.8 V VIL Low-level input voltage VIH High-level input voltage VILhyst Low-level threshold Input falling 0.8 1.35 V VIHhyst High-level threshold Input rising 1.3 2.0 V Vhyst Schmitt trigger hysteresis 0.3 0.8 V Vol Low-level output 0.2 V Voh High-level output Idd 2.0 V IoI = 100 A Ioh = -100 A VDD0.2 V Ioh = -2 mA 2.4 V Reset conditions 15 Normal conditions with CKOUT 60 Quiescent current mA DocID022647 Rev 5 15/84 Microphone interface STA321MP 3 Microphone interface 3.1 PDM clock generator (for microphones) In order to correctly start up the device in the microphone processor mode, it is necessary to set registers 0x00 to 0x9B and register 0x5D to 0x01. The CKOUT pin can be used to properly provide a clock source for digital microphones. When the mikemode bit is asserted (reg 0x5D bit 0), the CKOUT generator is automatically configured in order to generate a clock with sys_clk/32 frequency (corresponding to a PDM oversampling rate of 64). For example, considering a base sample frequency of: Fs = 44.1 kHz XTI = 11.289 MHz (user provided) System clock = 90.3168 MHz (system generated) Clock out = 2.8224 MHz (system generated) Fs = 48.0 kHz XTI = 12.288 MHz (user provided) System clock= 98.304 MHz (system generated) Clock out = 3.072 MHz (system generated) Technical details The clock generator creates two output clocks with the same frequency, CKOUT270 has a 270 degrees phase shift with respect to CKOUT. One is exported outside the device and used to clock the microphones, the other is used internally to clock the PDM interface of the STA321MP. 16/84 DocID022647 Rev 5 STA321MP Microphone interface Figure 5. PDM clock generator STA321MPL CLK Generator PDM Selector CLKOUT Dual Microphone 1 CLK DataOut CLKOUT_270 PDM_IC_CLK PDM_1 PDM_1 PDM_2 PDM_2 PDM_3 PDM_3 PDM_4 PDM_4 PDM_5 PDM_5 PDM_6 PDM_6 D/S 0 Dual Microphone 2 CLK DataOut D/S 0 Dual Microphone 3 CLK 3.2 DataOut D/S 0 PDM resampling interface The PDM resampling interface is used to properly sample external data. It can work in three different modes: Compatibility mode, Dual-membrane and Advanced. In each mode data are sampled at the rising or falling edge. Table 9. Modes for PDM resampling interface Mode Behavior 00 Compatibility (old) 01 Reserved 10 Dual-membrane 11 Advanced Compatibility mode In this mode every channel is sampled at the rising edge. Dual-membrane mode The dual-membrane mode is a particular configuration (automatically applied when the proper bit is asserted) which permits the use of the dual-membrane microphone. In particular it has 2 PDM data channels (normal and high) muxed in a single wire. The normal channel is sampled at the falling edge, while the high channel is sampled at the rising edge. Advanced mode In this mode every channel can be sampled at the rising or falling edge according to the configuration register. DocID022647 Rev 5 17/84 Microphone interface 3.3 STA321MP PDM recombination (dual-membrane microphone support) Dual microphone scenario: A dual-membrane microphone has two separate PDM signal paths: Normal channel for moderate SPL (Sound Pressure Level) acoustic signals High channel for high SPL acoustic signals The sensitivity of the high channel is configurable and is set by default to 20 dBSPL lower than the sensitivity of the normal channel in order to avoid saturation in any part of the signal path. The two channels can be combined together in order to enlarge the dynamic range and have a good trade-off between the DNR and the noise floor (which is lower in the case of the normal channel). The main functionality is based on a signal level measurement and a dual-threshold system. If the signal of the normal channel is: above the upper threshold (TH_H), the output will be taken from the high channel under the lower threshold (TH_N), the output will be taken from the normal channel between TH_H and TH_N, the output will be a combination of the high and normal channels. Figure 6. PDM recombination block diagram Mike_N Low Pass Norm_Atten Level Meter Sens_Adj Mike Recomb output TH_H TH_N Recombination Engine Mike_H Low Pass 3.4 Low-pass filter A filter is provided (and needed) in order to suppress the noise outside the audio band that may be still present before the recombination stage. The filter is a 2nd order IIR (Infinite Impulse Response) low-pass with a cutoff frequency of 20 kHz and it can be bypassed through the I2C bit. Configuration registers: 0x62(6), 0x63(6), 0x64(6) 18/84 DocID022647 Rev 5 STA321MP 3.5 Microphone interface Sensitivity adjustment The sensitivity adjustment control can be used to compensate the differences between the theoretical and the real sensitivity. It is applied to all the membranes of the microphone. Sensitivity adjustment = [-4, 3.875) with a 0.125 dB step Configuration registers: 0x5F(5-0), 0x60(5-0), 0x61(5-0) 3.6 Normal channel attenuation The NORM_Att is a parameter must be set to the sensitivity difference between the High SPL channel and the Normal SPL channel. By default its value is set to 20 dB. Configuration registers: 0x52(5-0), 0x63(5-0), 0x64(5-0) 3.7 Thresholds The two thresholds can be configured in order to control/select the recombination engine behavior. In particular they can be used to give more weight (in the final output) to the Normal Channel or to the High Channel which will lead to choose the trade-off between having lower distortion (High Channel) or lower noise floor (Normal Channel). Configuration registers: 0x65(5-0), 0x66(5-0), 0x67(5-0), 0x68(5-0), 0x69(5-0), 0x6A(5-0) DocID022647 Rev 5 19/84 I2C bus operation 4 STA321MP I2C bus operation The STA321MP supports the I2C protocol via the input ports SCL and SDA_IN (master to slave) and the output port SDA_OUT (slave to master). This protocol defines any device that sends data on to the bus as a transmitter and any device that reads the data as a receiver. The device that controls the data transfer is known as the master and the other as the slave. The master always starts the transfer and provides the serial clock for synchronization. The STA321MP is always a slave device in all of its communications. 4.1 Communication protocol 4.1.1 Data transition or change Data changes on the SDA line must only occur when the SCL clock is low. An SDA transition while the clock is high is used to identify a START or STOP condition. 4.1.2 Start condition START is identified by a high-to-low transition of the data bus SDA signal while the clock signal SCL is stable in the high state. A START condition must precede any command for data transfer. 4.1.3 Stop condition STOP is identified by a low-to-high transition of the data bus SDA signal while the clock signal SCL is stable in the high state. A STOP condition terminates communication between the STA321MP and the bus master. 4.1.4 Data input During the data input the STA321MP samples the SDA signal on the rising edge of clock SCL. For correct device operation the SDA signal must be stable during the rising edge of the clock and the data can change only when the SCL line is low. 4.2 Device addressing To start communication between the master and the Omega FFX core, the master must initiate with a start condition. Following this, the master sends 8 bits onto the SDA line (MSB first) corresponding to the device select address and read or write mode. The 7 most significant bits are the device address identifiers, corresponding to the I2C bus definition. In the STA321MP the I2C interface has two device addresses depending on the SA port configuration, 0x40 or 0100000x when SA = 0, and 0x42 or 0100001x when SA = 1. The 8th bit (LSB) identifies read or write operation RW, this bit is set to 1 in read mode and 0 for write mode. After a START condition the STA321MP identifies on the bus the device 20/84 DocID022647 Rev 5 I2C bus operation STA321MP address and if a match is found, it acknowledges the identification on SDA bus during the 9th-bit time. The byte following the device identification byte is the internal space address. 4.3 Write operation Following the START condition the master sends a device select code with the RW bit set to 0. The STA321MP acknowledges this and the writes for the byte of internal address. After receiving the internal byte address the STA321MP again responds with an acknowledgement. 4.3.1 Byte write In the byte write mode the master sends one data byte, this is acknowledged by the Omega FFX core. The master then terminates the transfer by generating a STOP condition. 4.3.2 Multi-byte write The multi-byte write modes can start from any internal address. The master generating a STOP condition terminates the transfer. Figure 7. Write mode sequence ACK DEV-ADDR BYTE WRITE ACK SUB-ADDR RW START STOP ACK MULTIBYTE WRITE DEV-ADDR START ACK DATA IN ACK SUB-ADDR ACK DATA IN ACK DATA IN STOP RW DocID022647 Rev 5 21/84 I2C bus operation STA321MP 4.4 Read operation 4.4.1 Current address byte read Following the START condition, the master sends a device select code with the RW bit set to 1. The STA321MP acknowledges this and then responds by sending one byte of data. The master then terminates the transfer by generating a STOP condition. 4.4.2 Current address multi-byte read The multi-byte read modes can start from any internal address. Sequential data bytes are read from sequential addresses within the STA321MP. The master acknowledges each data byte read and then generates a STOP condition, terminating the transfer. 4.4.3 Random address byte read Following the START condition, the master sends a device select code with the RW bit set to 0. The STA321MP acknowledges this and then the master writes the internal address byte. After receiving the internal byte address, the STA321MP again responds with an acknowledgement. The master then initiates another START condition and sends the device select code with the RW bit set to 1. The STA321MP acknowledges this and then responds by sending one byte of data. The master then terminates the transfer by generating a STOP condition. 4.4.4 Random address multi-byte read The multi-byte read mode can start from any internal address. Sequential data bytes are read from sequential addresses within the STA321MP. The master acknowledges each data byte read and then generates a STOP condition, terminating the transfer. Figure 8. Read mode sequence ACK CURRENT ADDRESS READ DEV-ADDR NO ACK DATA RW START STOP ACK RANDOM ADDRESS READ DEV-ADDR ACK SUB-ADDR RW RW= ACK HIGH START SEQUENTIAL CURRENT READ ACK DEV-ADDR DEV-ADDR S TAR T NO ACK DATA RW ACK STOP ACK DATA DATA NO ACK DATA STOP START ACK SEQUENTIAL RANDOM READ DEV-ADDR START 22/84 ACK ACK SUB-ADDR RW DEV-ADDR S TAR T ACK DATA RW DocID022647 Rev 5 ACK DATA NO ACK DATA STOP STA321MP Registers 5 Registers 5.1 Register summary Table 10. Register summary Addr Name D7 D6 D5 D4 COS1 COS0 DSPB IR1 SAOD4 D3 D2 D1 D0 IR0 MCS2 MCS1 MCS0 SAOFB SAO3 SAO2 SAO1 SAO0 Configuration 0x00 CONFA 0x01 0x02 ConfC 0x03 ConfD MPC CSZ4 CSZ3 CSZ2 CSZ1 CSZ0 OM1 OM0 0x04 ConfE C8BO C7BO C6BO C5BO C4BO C3BO C2BO C1BO 0x05 ConfF PWMS2 PWMS1 PWMS0 BQL PSL DEMP DRC HPB 0x06 ConfG MPCV DCCV HPE AM2E AME COD SID PWMD 0x07 ConfH ECLE LDTE BCLE IDE ZDE SVE ZCE NSBW 0x08 ConfI EAPD PSCE Volume control 0x09 MMUTE MMUTE 0x0A Mvol MV7 MV6 MV5 MV4 MV3 MV2 MV1 MV0 0x0B C1Vol C1V7 C1V6 C1V5 C1V4 C1V3 C1V2 C1V1 C1V0 0x0C C2Vol C2V7 C2V6 C2V5 C2V4 C2V3 C2V2 C2V1 C2V0 0x0D C3Vol C3V7 C3V6 C3V5 C3V4 C3V3 C3V2 C3V1 C3V0 0x0E C4Vol C4V7 C4V6 C4V5 C4V4 C4V3 C4V2 C4V1 C4V0 0x0F C5Vol C5V7 C5V6 C5V5 C5V4 C5V3 C5V2 C5V1 C5V0 0x10 C6Vol C6V7 C6V6 C6V5 C6V4 C6V3 C6V2 C6V1 C6V0 0x11 C7Vol C7V7 C7V6 C7V5 C7V4 C7V3 C7V2 C7V1 C7V0 0x12 C8Vol C8V7 C8V6 C8V5 C8V4 C8V3 C8V2 C8V1 C8V0 0x13 C1VTMB C1M C1VBP C1VT4 C1VT3 C1VT2 C1VT1 C1VT0 0x14 C2VTMB C2M C2VBP C2VT4 C2VT3 C2VT2 C2VT1 C2VT0 0x15 C3VTMB C3M C3VBP C3VT4 C3VT3 C3VT2 C3VT1 C3VT0 0x16 C4VTMB C4M C4VBP C4VT4 C4VT3 C4VT2 C4VT1 C4VT0 0x17 C5VTMB C5M C5VBP C5VT4 C5VT3 C5VT2 C5VT1 C5VT0 0x18 C6VTMB C6M C6VBP C6VT4 C6VT3 C6VT2 C6VT1 C6VT0 0x19 C7VTMB C7M C7VBP C7VT4 C7VT3 C7VT2 C7VT1 C7VT0 0x1A C8VTMB C8M C8VBP C8VT4 C8VT3 C8VT2 C8VT1 C8VT0 DocID022647 Rev 5 23/84 Registers STA321MP Table 10. Register summary (continued) Addr Name D7 D6 D5 D4 D3 D2 D1 D0 Input mapping 0x1B C12im C2IM2 C2IM1 C2IM0 C1IM2 C1IM1 C1IM0 0x1C C34im C4IM2 C4IM1 C4IM0 C3IM2 C3IM1 C3IM0 0x1D C56im C6IM2 C6IM1 C6IM0 C5IM2 C5IM1 C5IM0 0x1E C78im C8IM2 C8IM1 C8IM0 C7IM2 C7IM1 C7IM0 C7BLP C6BLP C5BLP C3BLP C2BLP C1BLP Processing loop 0x28 BQlp C8BLP C4BLP 0x29 MXlp C8MXLP C7MXLP C6MXLP C5MXLP C4MXLP C3MXLP C2MXLP C1MXLP Processing bypass 0x2A EQbp C8EQBP C7EQBP C6EQBP C5EQB 0x2B ToneBP C8TCB C4EQBP C3EQBP C2EQBP C1EQBP C7TCB C6TCB C5TCB C4TCB C3TCB C2TCB C1TCB TTC2 TTC1 TTC0 BTC3 BTC2 BTC1 BTC0 Tone control 0x2C Tone TTC3 Dynamics control 0x2D C1234ls C4LS1 C4LS0 C3LS1 C3LS0 C2LS1 C2LS0 C1LS1 C1LS0 0x2E C5678ls C8LS1 C8LS0 C7LS1 C7LS0 C6LS1 C6LS0 C5LS1 C5LS0 0x2F L1ar L1A3 L1A2 L1A1 L1A0 L1R3 L1R2 L1R1 L1R0 0x30 L1atrt L1AT3 L1AT2 L1AT1 L1AT0 L1RT3 L1RT2 L1RT1 L1RT0 0x31 L2ar L2A3 L2A2 L2A1 L2A0 L2R3 L2R2 L2R1 L2R0 0x32 L2atrt L2AT3 L2AT2 L2AT1 L2AT0 L2RT3 L2RT2 L2RT1 L2RT0 PWM output timing 0x33 C12ot C2OT2 C2OT1 C2OT0 C1OT2 C1OT1 C1OT0 0x34 C34ot C4OT2 C4OT1 C4OT0 C3OT2 C3OT1 C3OT0 0x35 C56ot C6OT2 C6OT1 C6OT0 C5OT2 C5OT1 C5OT0 0x36 C78ot C8OT2 C8OT1 C8OT0 C7OT2 C7OT1 C7OT0 IS output channel mapping 24/84 0x37 C12om C2OM2 C2OM1 C2OM0 C1OM2 C1OM1 C1OM0 0x38 C34om C4OM2 C4OM1 C4OM0 C3OM2 C3OM1 C3OM0 0x39 C56om C6OM2 C6OM1 C6OM0 C5OM2 C5OM1 C5OM0 0x3A C78om C8OM2 C8OM1 C8OM0 C7OM2 C7OM1 C7OM0 DocID022647 Rev 5 STA321MP Registers Table 10. Register summary (continued) Addr Name D7 D6 D5 D4 D3 D2 D1 D0 User-defined coefficient RAM 0x3B Cfaddr1 CFA9 CFA8 0x3C Cfaddr2 CFA7 CFA6 CFA5 CFA4 CFA3 CFA2 CFA1 CFA0 0x3D B1cf1 C1B23 C1B22 C1B21 C1B20 C1B19 C1B18 C1B17 C1B16 0x3E B1cf2 C1B15 C1B14 C1B13 C1B12 C1B11 C1B10 C1B9 C1B8 0x3F B1cf3 C1B7 C1B6 C1B5 C1B4 C1B3 C1B2 C1B1 C1B0 0x40 B2cf1 C2B23 C2B22 C2B21 C2B20 C2B19 C2B18 C2B17 C2B16 0x41 B2cf2 C2B15 C2B14 C2B13 C2B12 C2B11 C2B10 C2B9 C2B8 0x42 B2cf3 C2B7 C2B6 C2B5 C2B4 C2B3 C2B2 C2B1 C2B0 0x43 A1cf1 C3B23 C3B22 C3B21 C3B20 C3B19 C3B18 C3B17 C3B16 0x44 A1cf2 C3B15 C3B14 C3B13 C3B12 C3B11 C3B10 C3B9 C3B8 0x45 A1cf3 C3B7 C3B6 C3B5 C3B4 C3B3 C3B2 C3B1 C3B0 0x46 A2cf1 C4B23 C4B22 C4B21 C4B20 C4B19 C4B18 C4B17 C4B16 0x47 A2cf2 C4B15 C4B14 C4B13 C4B12 C4B11 C4B10 C4B9 C4B8 0x48 A2cf3 C4B7 C4B6 C4B5 C4B4 C4B3 C4B2 C4B1 C4B0 0x49 B0cf1 C5B23 C5B22 C5B21 C5B20 C5B19 C5B18 C5B17 C5B16 0x4A B0cf2 C5B15 C5B14 C5B13 C5B12 C5B11 C5B10 C5B9 C5B8 0x4B B0cf3 C5B7 C5B6 C5B5 C5B4 C5B3 C5B2 C5B1 C5B0 0x4C Cfud WA W1 0x4D MPCC1 MPCC15 MPCC14 MPCC13 MPCC12 MPCC11 MPCC10 MPCC9 MPCC8 0x4E MPCC2 MPCC7 MPCC6 MPCC5 MPCC4 MPCC3 MPCC2 MPCC1 MPCC0 0x4F DCC1 DCC15 DCC14 DCC13 DCC12 DCC11 DCC10 DCC9 DCC8 0x50 DCC2 DCC7 DCC6 DCC5 DCC4 DCC3 DCC2 DCC1 DCC0 0x51 PSC1 RCV11 RCV10 RCV9 RCV8 RCV7 RCV6 RCV5 RCV4 0x52 PSC2 RCV3 RCV2 RCV1 RCV0 CNV11 CNV10 CNV9 CNV8 0x53 PSC3 CNV7 CNV6 CNV5 CNV4 CNV3 CNV2 CNV1 CNV0 0x57 BACT R8BACT R7BACT R6BACT R5BACT R4BACT R3BACT R2BACT R1BCAT 0x58 BEND R8BEND R7BEND R6BEND 0x59 BBAD R8BBAD R7BBAD R6BBAD R5BBAD R4BBAD R3BBAD R2BBAD R1BBAD 0x5A L12new 0x5B FineVol BIST R5BEND R4BEND R3BEND R2BEND R1BEND NLENAR CFINE8 CFINE7 CFINE6 CFINE5 DocID022647 Rev 5 CFINE4 CFINE3 CFINE2 CFINE1 25/84 Registers STA321MP Table 10. Register summary (continued) Addr Name D7 D6 D5 D4 D3 D2 D1 D0 PDM and recombination IP interface 0x5C MRBist MHFail MHBad MHEnd 0x5D RCTR1 Boost6db 0x5E PDMCT AdvM6 AdvM5 0x5F RCTR2 bypRM1 CH1GG[5:0] 0x60 RCTR3 bypRM2 CH2GG[5:0] 0x61 RCTR4 bypRM3 CH3GG[5:0] 0x62 RCTR5 LP1en CH1NCA[5:0] 0x63 RCTR6 LP2en CH2NCA[5:0] 0x64 RCTR7 LP3en CH3NCA[5:0] 0x65 RCTR8 CH1TH_N[5:0] 0x66 RCTR9 CH2TH_N[5:0] 0x67 RCTR10 CH3TH_N[5:0] 0x68 RCTR11 CH1TH_H[5:0] 0x69 RCTR12 CH2TH_H[5:0] 0x6A RCTR13 CH3TH_H[5:0] AdvM4 MHAct MNFail MNBad MNEnd MNAct IS_byp IS_en mike_en mike_byp m_mode AdvM3 AdvM2 AdvM1 PDMSM[1:0] Clock manager configuration/status registers 0x71 pllfrac1 PLFI15 PLFI14 PLFI13 PLFI12 PLFI11 PLFI10 PLFI9 PLFI8 0x72 pllfrac0 PLFI7 PLFI6 PLFI5 PLFI4 PLFI3 PLFI2 PLFI1 PLFI0 0x73 pll div PLLDD1 PLLDD0 PLLND5 PLLND4 0x74 pll conf0 PDPDC PLLFC 0x75 pll conf1 PLLBYP PLLDPR LOWEN BST32K 0x76 pll stat PLLBYS PLLPDS OSCOK LOWCKS PLLND3 PLLND2 PLLND1 PLLND0 PLSTRB PLSTBB PLIFD3 PLIFD2 PLIFD1 PLIFD0 Biquad configuration 0x77 CBQ1 EBQ3_1 EBQ3_0 EBQ2_1 EBQ2_0 EBQ1_1 EBQ1_0 EBQ0_0 EBQ0_0 0x78 CBQ2 EBQ7_1 EBQ7_0 EBQ6_1 EBQ6_0 EBQ5_1 EBQ5_0 EBQ4_0 EBQ4_0 0x79 CBQ3 nshen EBQ9_1 EBQ9_0 EBQ8_0 EBQ8_0 RMS status registers 0x7A rmsZMH RZM15 RZM14 RZM13 RZM12 RZM11 RZM10 RZM9 RZM8 0X7B rmsZML RZM7 RZM6 RZM5 RZM4 RZM3 RZM2 RZM1 RZM0 0X7C rmsPOH RPO15 RPO14 RPO13 RPO12 RPO11 RPO10 RPO9 RPO8 0X7D rmsPOL RPO7 RPO6 RPO5 RPO4 RPO3 RPO2 RPO1 RPO0 DPT4 DPT3 DPT2 DPT1 DPT0 RL0 RD SID1 FBYP RTP Tristate startup/shutdown pop removal signals 26/84 0x80 DPT 0x81 CFR129 RL3 0x82 TSDLY1 UDDT15 UDDT14 UDDT13 UDDT12 UDDT11 UDDT10 UDDT9 UDDT8 0x83 TSDLY2 UDDT7 UDDT0 RL2 UDDT6 RL1 UDDT5 UDDT4 DocID022647 Rev 5 UDDT3 UDDT2 UDDT1 STA321MP Registers 5.2 Register description 5.2.1 Configuration register A (0x00) D7 D6 D5 D4 D3 D2 D1 D0 COS1 COS0 DSPB IR1 IR0 MCS2 MCS1 MCS0 1 0 0 1 1 0 1 1 Bit RW RST Name 0 RW 1 MCS0 1 RW 1 MCS1 2 RW 0 MCS2 Description Master clock select: selects the ratio between the input sampling frequency (PDM I/FCLK)and the input clock (XTI). The internal clock depends on the external clock freq. provided to the XTI pin. It can be either 90.3168 MHz or 98.304 MHz in case of XTI is respectively 11.2896MHz or 12.288MHz. The relationship between the input clock XTI and the PDM interface clock is determined by both the MCSn and the IRn (input rate) register bits. IR[1,0] = 11 sets the PDM interface enable and MCS[2:0]=011 means XTI=4*PDM interface clock. If XTI input is not used, related pin must be tied to GND. MCS[2:0] Input sampling rate IR fs (kHz) XTI 11 1xx 011 010 001 000 2*PDM_CK 4*PDM_CK 6*PDM_CK 8*PDM_CK 12*PDM_CK Interpolation ratio select Bit RW RST Name 0 RW 0 DSPB Description DSP bypass bit: 0: normal operation 1: bypass of biquad and bass/treble functions Setting the DSPB bit bypasses the biquad function of the FFX core. DocID022647 Rev 5 27/84 Registers STA321MP COS [1,0] CKOUT frequency 00 PLL output 01 PLL output / 4 10 PLL output / 8 11 PLL output / 16 cos [1,0] sets the clock out value; clock out frequency is a ratio of the internal clock, such ratio depends on the cos[1,0] setting. Example cos[1,0] =10: XTI = 12.288 PLL output = 98.304 MHz CK_out = 98.304 / 8 = 12.288 Clock out is automatically configured in order to obtain a frequency of 64 Fs (sys_clock/32) if the bit0 of the register 0x5D is asserted. This generates a valid clock to be provided to a digital (PDM) microphone. 28/84 DocID022647 Rev 5 STA321MP 5.2.2 Registers Configuration register C (0x02) - serial output formats D7 D6 D5 D4 D3 D2 D1 D0 SAOD4 SAOFB SAO3 SAO2 SAIO SAO0 0 0 0 0 0 0 Bit RW RST Name 0 RW 0 SAO0 1 RW 0 SAO1 2 RW 0 SAO2 3 RW 0 SAO3 Description Serial audio output interface format: determines the interface format of the output serial digital audio interface. The STA321MP features a serial audio output interface that consists of 8 channels. The serial audio output always acts as a slave to the serial audio input interface and, therefore, all output clocks are synchronous with the input clocks. The output sampling frequency (fs) is also equivalent to the input sampling frequency. In the case of PDM input, the serial audio output acts as a master with an output sampling frequency of 8 xfs, 4 xfs or fs depending on SAOD4 bit. The output serial format can be selected independently from the input format and is done via the SAO and SAOFB bits. Bit RW RST Name 4 RW 0 SAOFB Bit RW RST Name Description SAOD4 Enables decimation by 4 on SAO interface for PDM input; no effect for others. 0: div by 1 1: div by 4 (1) 5 RW 0 Description Determines MSB or LSB first for all SAO formats: 0: MSB first 1: LSB first 1. To avoid any aliasing on SAO streaming, a low-pass filter is needed to be implemented in one of the available user-programmable biquads. DocID022647 Rev 5 29/84 Registers STA321MP Table 11. Serial audio output formats according to sampling rate BICKO SAO[3:0] Interface data format 0111 IS data 1111 Left/right-justified 16-bit data 1110 IS data 0001 Left-justified data 1010 Right-justified 24-bit data 1011 Right-justified 20-bit data 1100 Right-justified 18-bit data 1101 Right-justified 16-bit data 0000 IS data 0001 Left-justified data 0010 Right-justified 24-bit data 0011 Right-justified 20-bit data 0100 Right-justified 18-bit data 0101 Right-justified 16-bit data 32 * fs 48 * fs 64 * fs 30/84 DocID022647 Rev 5 STA321MP 5.2.3 Registers Configuration register D (0x03) D7 D6 D5 D4 D3 D2 D1 D0 MPC CSZ4 CSZ3 CSZ2 CSZ1 CSZ0 OM1 OM0 1 1 1 1 1 1 1 0 Bit RW RST Name 0 RW 0 OM0 1 RW 1 OM1 Description FFX power output mode: selects configuration of FFX output The FFX power output mode selects how the FFX output timing is configured. Different power devices use different output modes. Bit RW RST Name 2 RW 1 CSZ0 3 RW 1 CSZ1 4 RW 1 CSZ2 5 RW 1 CSZ3 6 RW 1 CSZ4 CSZ[4:0] Description Contra size register: when OM[1,0] = 11, this register determines the size of the FFX compensating pulse from 0 clock ticks to 31 clock periods Compensating pulse size 00000 0 clock period compensating pulse size 00001 1 clock period compensating pulse size ... 11111 ... 31 clock period compensating pulse size DocID022647 Rev 5 31/84 Registers 5.2.4 STA321MP Configuration register E (0x04) D7 D6 D5 D4 D3 D2 D1 D0 C8BO C7BO C6BO C5BO C4BO C3BO C2BO C1BO 0 0 0 0 0 0 0 0 Bit RW RST Name 0 RW 0 C1BO 1 RW 0 C2BO 2 RW 0 C3BO 3 RW 0 C4BO 4 RW 0 C5BO 5 RW 0 C6BO 6 RW 0 C7BO 7 RW 0 C8BO Description Channels 1, 2, 3, 4, 5, 6, 7, and 8 binary output mode enable bits. A setting of 0 indicates ordinary FFX tristate output. A setting of 1 indicates binary output mode. Each individual channel output can be set to output a binary PWM stream. In this mode output A of a channel will be considered the positive output and output B is the negative inverse. 5.2.5 Configuration register F (0x05) D7 D6 D5 D4 D3 D2 D1 D0 PWMS2 PWMS1 PWMS0 BQL PSL DEMP DRC HPB 0 0 0 0 0 0 0 0 Bit RW RST Name 0 RW 0 HPB Description High-pass filter bypass bit: setting of one bypasses internal AC coupling digital high-pass filter The STA321MP features an internal digital high-pass filter for the purpose of AC coupling. The purpose of this filter is to prevent DC signals from passing through an FFX amplifier. DC signals can cause speaker damage. If HPB = 1, then the filter that the high-pass filter utilizes is made available as userprogrammable biquad #1. Bit RW RST Name 1 RW 0 DRC Description Dynamic range compression/anti-clipping 0: limiters act in anti-clipping mode 1: limiters act in dynamic range compression mode Both limiters can be used in one of two ways, anti-clipping or dynamic range compression. When used in anti-clipping mode, the limiter threshold values are constant and dependent on the limiter settings. 32/84 DocID022647 Rev 5 STA321MP Registers In dynamic range compression mode, the limiter threshold values vary with the volume settings allowing a nighttime listening mode that provides a reduction in the dynamic range regardless of the volume level. Bit RW RST Name 2 RW 0 DEMP Description De-emphasis: 0: no de-emphasis 1: de-emphasis By setting this bit to one de-emphasis will be implemented on all channels. When this is used it takes the place of biquad #7 in each channel and any coefficients using biquad #1 will be ignored. The DSPB (DSP bypass) bit must be set to 0 for de-emphasis to function. Bit RW RST Name 3 RW 0 PSL Description Post-scale link: 0: each channel uses individual post-scale value 1: each channel uses channel 1 post-scale value Post-scale functionality can be used for power-supply error correction. For multi-channel applications running off the same power-supply, the post-scale values can be linked to the value of channel 1 for ease of use and in order to update the values faster. Bit RW RST Name 4 RW 0 BQL Description Biquad link: 0: each channel uses coefficient values 1: each channel uses channel 1 coefficient values For ease of use, all channels can use the biquad coefficients loaded into the channel 1 coefficient RAM space by setting the BQL bit to 1. Therefore, any EQ updates only have to be performed once. Bit RW RST Name 7:5 RW 00 PWMS[2:0] PWMS[1:0] Description PWM speed selection PWM output speed 000 Normal speed (384 kHz) (all channels) 001 Half-speed (192 kHz) (all channels) 010 Double-speed (768 kHz) (all channels) 011 Normal speed (channels 1-6), double-speed (channels 7-8) 100 Odd speed (341.3 kHz) (all channels) DocID022647 Rev 5 33/84 Registers 5.2.6 STA321MP Configuration register G (0x06) D7 D6 D5 D4 D3 D2 D1 D0 MPCV DCCV HPE AM2E AME COD SID PWMD 0 0 0 0 0 0 0 0 Bit RW RST Name 0 RW 0 PWMD 1 RW 0 SID Serial interface (IS out) disable: 0: IS output normal 1: no IS output 2 RW 0 COD Clock output disable: 0: clock output normal 1: no clock output Bit RW RST Name 3 RW 0 AME Description PWM output disable: 0: PWM output normal 1: no PWM output Description AM mode enable: 0: normal FFX operation 1: AM reduction mode FFX operation The STA321MP features an FFX processing mode that minimizes the amount of noise generated in the frequency range of AM radio. This mode is intended for use when FFX is operating in a device with an active AM tuner. The SNR of the FFX processing is reduced to ~83 dB in this mode, which is still greater than the SNR of AM radio. Bit RW RST Name 4 RW 0 AM2E Description AM2 mode enable: 0: normal FFX operation 1: AM2 reduction mode FFX operation The STA321MP features two FFX processing modes that minimize the amount of noise generated in the frequency range of AM radio. This second mode is intended for use when FFX is operating in a device with an active AM tuner. This mode eliminates the noiseshaper. Bit RW RST Name 5 RW 0 HPE Description FFX headphone enable: 0: channels 7 and 8 normal FFX operation 1: channels 7 and 8 headphone operation Channels 7 and 8 can be configured to be processed and output in such a manner that headphones can be driven using an appropriate output device. This signal is a differential 3-wire drive called FFX headphone. 34/84 DocID022647 Rev 5 STA321MP 5.2.7 Registers Bit RW RST Name 6 RW 0 DCCV Bit RW RST Name 7 RW 0 MPCV Description Distortion compensation variable enable: 0: uses the preset DC coefficient 1: uses the DCC coefficient Description Max power correction variable: 0: uses the standard MPC coefficient 1: uses the MPCC bits for the MPC coefficient Configuration register H (0x07) D7 D6 D5 D4 D3 D2 D1 D0 ECLE LDTE BCLE IDE ZDE SVE ZCE NSBW 0 1 1 1 1 1 1 0 Bit RW RST Name Description 0 RW 0 NSBW Noise-shaper bandwidth selection: 1: 3rd order NS 0: 4th order NS Bit RW RST Name Description 1 RW 1 ZCE Zero-crossing volume enable: 1: volume adjustments will only occur at digital zerocrossings 0: volume adjustments will occur immediately The ZCE bit enables zero-crossing volume adjustments. When volume is adjusted on digital zero-crossings, no clicks will be audible. Bit RW RST Name 2 RW 1 SVE Bit RW RST Name 3 RW 1 ZDE Description Soft volume enable: 1: volume adjustments use soft volume 0: volume adjustments occur immediately Description Zero-detect mute enable: setting of 1 enables the automatic zero-detect mute Setting the ZDE bit enables the zero-detect automatic mute. See Section 6.5.8 for more details. DocID022647 Rev 5 35/84 Registers STA321MP Bit RW RST Name 4 RW 1 IDE Description Invalid input detect mute enable: 1: enable the automatic invalid input detect mute Setting the IDE bit enables this function, which looks at the input IS data and will automatically mute if the signals are perceived as invalid. Bit RW RST Name 5 RW 1 BCLE Description Binary output mode clock loss detection enable The BCLE bit detects loss of input MCLK in binary mode and will output 50% duty cycle. Bit RW RST Name 6 RW 1 LDTE Description LRCLK double trigger protection enable The LDTE bit actively prevents double triggering of LRCLK. Bit RW RST Name 7 RW 0 ECLE Description Auto EAPD on clock loss When active, the ECLE bit will issue a device power-down signal (EAPD) on clock loss detection. 5.2.8 Configuration register I (0x08) D7 D6 D5 D4 D3 D2 D1 D0 EAPD PSCE 0 0 This feature utilizes an ADC on SDI78 that provides power supply ripple information for correction. Registers PSC1, PSC2, PSC3 are utilized in this mode. 36/84 Bit RW RST Name 0 RW 0 PSCE Bit RW RST Name 7 RW 0 EAPD Description Power supply ripple correction enable: 0: normal operation 1: PSCorrect operation Description External amplifier power-down: 0: external power stage power-down active 1: normal operation DocID022647 Rev 5 STA321MP 5.2.9 Registers Master mute register (0x09) D7 D6 D5 D4 D3 D2 D1 D0 MMUTE 0 5.2.10 Master volume register (0x0A) D7 D6 D5 D4 D3 D2 D1 D0 MV7 MV6 MV5 MV4 MV3 MV2 MV1 MV0 1 1 1 1 1 1 1 1 Note: The value of the volume derived from MVOL is dependent on the AMV AutoMode volume settings. 5.2.11 Channel 1 volume (0x0B) 5.2.12 5.2.13 5.2.14 D7 D6 D5 D4 D3 D2 D1 D0 C1V7 C1V6 C1V5 C1V4 C1V3 C1V2 C1V1 C1V0 0 1 1 0 0 0 0 0 Channel 2 volume (0x0C) D7 D6 D5 D4 D3 D2 D1 D0 C2V7 C2V6 C2V5 C2V4 C2V3 C2V2 C2V1 C2V0 0 1 1 0 0 0 0 0 Channel 3 volume (0x0D) D7 D6 D5 D4 D3 D2 D1 D0 C3V7 C3V6 C3V5 C3V4 C3V3 C3V2 C3V1 C3V0 0 1 1 0 0 0 0 0 Channel 4 volume (0x0E) D7 D6 D5 D4 D3 D2 D1 D0 C4V7 C4V6 C4V5 C4V4 C4V3 C4V2 C4V1 C4V0 0 1 1 0 0 0 0 0 DocID022647 Rev 5 37/84 Registers 5.2.15 5.2.16 5.2.17 5.2.18 5.2.19 5.2.20 5.2.21 38/84 STA321MP Channel 5 volume (0x0F) D7 D6 D5 D4 D3 D2 D1 D0 C5V7 C5V6 C5V5 C5V4 C5V3 C5V2 C5V1 C5V0 0 1 1 0 0 0 0 0 Channel 6 volume (0x10) D7 D6 D5 D4 D3 D2 D1 D0 C6V7 C6V6 C6V5 C6V4 C6V3 C6V2 C6V1 C6V0 0 1 1 0 0 0 0 0 Channel 7 volume (0x11) D7 D6 D5 D4 D3 D2 D1 D0 C7V7 C7V6 C7V5 C7V4 C7V3 C7V2 C7V1 C7V0 0 1 1 0 0 0 0 0 Channel 8 volume (0x12) D7 D6 D5 D4 D3 D2 D1 D0 C8V7 C8V6 C8V5 C8V4 C8V3 C8V2 C8V1 C8V0 0 1 1 0 0 0 0 0 Channel 1 volume trim, mute, bypass (0x13) D7 D6 C1M C1VBP 0 0 D5 0 D4 D3 D2 D1 D0 C1VT4 C1VT3 C1VT2 C1VT1 C1VT0 1 0 0 0 0 Channel 2 volume trim, mute, bypass (0x14) D7 D6 C2M C2VBP 0 0 D5 0 D4 D3 D2 D1 D0 C2VT4 C2VT3 C2VT2 C2VT1 C2VT0 1 0 0 0 0 Channel 3 volume trim, mute, bypass (0x15) D7 D6 C3M C3VBP 0 0 D5 0 D4 D3 D2 D1 D0 C3VT4 C3VT3 C3VT2 C3VT1 C3VT0 1 0 0 0 0 DocID022647 Rev 5 STA321MP 5.2.22 5.2.23 5.2.24 5.2.25 5.2.26 5.2.27 Registers Channel 4 volume trim, mute, bypass (0x16) D7 D6 C4M C4VBP 0 0 D5 D4 D3 D2 D1 D0 C4VT4 C4VT3 C4VT2 C4VT1 C4VT0 1 0 0 0 0 0 Channel 5 volume trim, mute, bypass (0x17) D7 D6 C5M C5VBP 0 0 D5 D4 D3 D2 D1 D0 C5VT4 C5VT3 C5VT2 C5VT1 C5VT0 1 0 0 0 0 0 Channel 6 volume trim, mute, bypass (0x18) D7 D6 C6M C6VBP 0 0 D5 D4 D3 D2 D1 D0 C6VT4 C6VT3 C6VT2 C6VT1 C6VT0 1 0 0 0 0 0 Channel 7 volume trim, mute, bypass (0x19) D7 D6 C7M C7VBP 0 0 D5 D4 D3 D2 D1 D0 C7VT4 C7VT3 C7VT2 C7VT1 C7VT0 1 0 0 0 0 0 Channel 8 volume trim, mute, bypass (0x1A) D7 D6 C8M C8VBP 0 0 D5 D4 D3 D2 D1 D0 C8VT4 C8VT3 C8VT2 C8VT1 C8VT0 1 0 0 0 0 0 Fine volume (FineVol) (0x5B) D7 D6 D5 D4 D3 D2 D1 D0 CFINE8 CFINE7 CFINE6 CFINE5 CFINE4 CFINE3 CFINE2 CFINE1 0 0 0 0 0 0 0 0 Bit 0-7 RW RW RST 0 Name CFINEx Description Set for each channel a fine volume of -0.25dB, this value has to be added to the whole volume. 0: fine vol off 1: fine vol on DocID022647 Rev 5 39/84 Registers STA321MP The volume structure of the STA321MP consists of individual volume registers for each channel and a master volume register that provides an offset to each channel's volume setting. There is also an additional offset for each channel called channel volume trim. The individual channel volumes are adjustable in 0.5 dB steps from +48 dB to -78 dB. As an example if C5V = 0xXX or +XXX dB and MV = 0xXX or -XX dB, then the total gain for channel 5 = XX dB. The channel volume trim is adjustable independently on each channel from -10 dB to +10 dB in 1 dB steps. A fine volume configuration register could be used to offset at 0.25 dB step each channel. The master mute when set to 1 will mute all channels at once, whereas the individual channel mutes (CnM) will mute only that channel. Both the master mute and the channel mutes provide a "soft mute" with the volume ramping down to mute in 8192 samples from the maximum volume setting at the internal processing rate (~192 kHz). A "hard mute" can be obtained by commanding a value of 0xFF (255) to any channel volume register or the master volume register. When volume offsets are provided via the master volume register any channel whose total volume is less than -91 dB will be muted. All changes in volume take place at zero-crossings when ZCE = 1 (configuration register H) on a per-channel basis as this creates the smoothest possible volume transitions. When ZCE = 0, volume updates occur immediately. Each channel also contains an individual channel volume bypass. If a particular channel has volume bypassed via the CnVBP = 1 register, then only the channel volume setting for that particular channel affects the volume setting, the master volume setting will not affect that channel. Each channel also contains a channel mute. If CnM = 1, a soft mute is performed on that channel. MV[7:0] Volume offset from channel value 0x00 0 dB 0x01 -0.5 dB 0x02 -1 dB ... ... 0x4C -38 dB ... ... 0xFE -127 dB 0xFF Hardware channel mute CnV[7:0] 40/84 Volume 0x00 +48 dB 0x01 +47.5 dB 0x02 +47 dB ... ... 0x5F +0.5 dB 0x60 0 dB 0x61 -0.5 dB ... ... 0xFE -79.5 dB 0xFF Hardware channel mute DocID022647 Rev 5 STA321MP Registers CnVT[4:0] 5.2.28 0x00 to 0x06 +10 dB 0x07 +9 dB ... ... 0x0F +1 dB 0x10 0 dB 0x11 -1 dB ... ... 0x19 -9 dB 0x1A to 0x1F -10 dB Channel input mapping channels 1 and 2 (0x1B) D7 5.2.29 D5 D4 C2IM2 C2IM1 0 0 D3 D2 D1 D0 C2IM0 C1IM2 C1IM1 C1IM0 1 0 0 0 D2 D1 D0 D6 D5 D4 D3 C4IM2 C4IM1 C4IM0 C3IM2 C3IM1 C3IM0 0 1 1 0 1 0 D2 D1 D0 Channel input mapping channels 5 and 6 (0x1D) D7 5.2.31 D6 Channel input mapping channels 3 and 4 (0x1C) D7 5.2.30 Volume D6 D5 D4 D3 C6IM2 C6IM1 C6IM0 C5IM2 C5IM1 C5IM0 1 0 1 1 0 0 D2 D1 D0 Channel input mapping channels 7 and 8 (0x1E) D7 D6 D5 D4 D3 C8IM2 C8M1 C8IM0 C7IM2 C7IM1 C7IM0 1 1 1 1 1 0 Each channel received via IS can be mapped to any internal processing channel via the channel input mapping registers. This allows for flexibility in processing, simplifies output stage designs, and enables the ability to perform crossovers. The default settings of these registers map each IS input channel to its corresponding processing channel. DocID022647 Rev 5 41/84 Registers STA321MP CnIM[2:0] 5.2.32 000 Channel 1 001 Channel 2 010 Channel 3 011 Channel 4 100 Channel 5 101 Channel 6 110 Channel 7 111 Channel 8 AGEQ - graphic EQ 80-Hz band (0x23) D7 5.2.33 D4 D3 D2 D1 D0 AGEQ4 AGEQ3 AGEQ2 AGEQ1 AGEQ0 0 1 1 1 1 D6 D5 D4 D3 D2 D1 D0 BGEQ4 BGEQ3 BGEQ2 BGEQ1 BGEQ0 0 1 1 1 1 D6 D5 D4 D3 D2 D1 D0 CGEQ4 CGEQ3 CGEQ2 CGEQ1 CGEQ0 0 1 1 1 1 D4 D3 D2 D1 D0 DGEQ4 DGEQ3 DGEQ2 DGEQ1 DGEQ0 0 1 1 1 1 DGEQ - graphic EQ 3-kHz band (0x26) D7 42/84 D5 CGEQ - graphic EQ 1-kHz band (0x25) D7 5.2.35 D6 BGEQ - graphic EQ 300-Hz band (0x24) D7 5.2.34 Serial input from D6 D5 DocID022647 Rev 5 STA321MP 5.2.36 Registers EGEQ - graphic EQ 8-kHz band (0x27) D7 D6 D5 D4 D3 D2 D1 D0 EGEQ4 EGEQ3 EGEQ2 EGEQ1 EGEQ0 0 1 1 1 1 xGEQ[4:0] 5.2.37 Boost / cut 11111 +16 11110 +15 11101 +14 ... ... 10000 +1 01111 0 01110 -1 ... ... 00001 -14 00000 -15 Biquad internal channel loop-through (0x28) D7 D6 D5 D4 D3 D2 D1 D0 C8BLP C7BLP C6BLP C5BLP C4BLP C3BLP C2BLP C1BLP 0 0 0 0 0 0 0 0 Each internal processing channel can receive two possible inputs at the input to the biquad block. The input can come either from the output of that channel's MIX#1 engine or from the output of the bass/treble (biquad #10) of the previous channel. In this scenario, channel 1 receives channel 8. This enables the use of more than 10 biquads on any given channel at the loss of the number of separate internal processing channels. Bit 7:0 RW RW RST 0 Name CnBLP Description For n = 1 to 8: 0: input from channel n MIX#1 engine output - normal operation 1: input from channel (n - 1) biquad #10 output - loop operation. DocID022647 Rev 5 43/84 Registers 5.2.38 STA321MP Mix internal channel loop-through (0x29) D7 D6 D5 D4 D3 D2 D1 D0 C8MXLP C7MXLP C6MXLP C5MXLP C4MXLP C3MXLP C2MXLP C1MXLP 0 0 0 0 0 0 0 0 Each internal processing channel can receive two possible sets of inputs at the input to the Mix#1 block. The inputs can come from the outputs of the interpolation block as normally occurs (CnMXLP = 0) or they can come from the outputs of the Mix#2 block. This enables the use of additional filtering after the second mix block at the expense of losing this processing capability on the channel. Bit RW 7:0 5.2.39 RW RST 0 Name Description CnMXLP For n = 1 to 8: 0: inputs to channel n MIX#1 engine from interpolation outputs - normal operation 1: inputs to channel n MIX#1 engine from MIX#2 engine outputs - loop operation EQ bypass (0x2A) D7 D6 D5 D4 D3 D2 D1 D0 C8EQBP C7EQBP C6EQBP C5EQBP C4EQCBP C3EQBP C2EQBP C1EQBP 0 0 0 0 0 0 0 0 EQ control can be bypassed on a per-channel basis. If EQ control is bypassed on a given channel, the prescale and all 10 filters (high-pass, biquads, de-emphasis, bass management cross-over, bass, treble in any combination) are bypassed for that channel. 5.2.40 Bit RW RST Name 7:0 RW 0 CnEQBP Description For n = 1 to 8: 0: perform EQ on channel n - normal operation 1: bypass EQ on channel n Tone control bypass (0x2B) D7 D6 D5 D4 D3 D2 D1 D0 C8TCB C7TCB C6TCB C5TCB C4TCB C3TCB C2TCB C1TCB 0 0 0 0 0 0 0 0 Tone control (bass/treble) can be bypassed on a per-channel basis. If tone control is bypassed on a given channel, the two filters that tone control utilizes are made available as user-programmable biquads #9 and #10. 44/84 DocID022647 Rev 5 STA321MP 5.2.41 Registers Tone control (0x2C) D7 D6 D5 D4 D3 D2 D1 D0 TTC3 TTC2 TTC1 TTC0 BTC3 BTC2 BTC1 BTC0 0 1 1 1 0 1 1 1 This is the tone control boost / cut as a function of the BTC and TTC bits. BTC[3:0] / TTC[3:0) 5.2.42 5.2.43 5.2.44 Boost / cut 0000 -12 dB 0001 -12 dB ... ... 0111 -4 dB 0110 -2 dB 0111 0 dB 1000 +2 dB 1001 +4 dB ... ... 1101 +12 dB 1110 +12 dB 1111 +12dB Channel limiter select channels 1, 2, 3, 4 (0x2D) D7 D6 D5 D4 D3 D2 D1 D0 C4LS1 C4LS0 C3LS1 C3LS0 C2LS1 C2LS0 C1LS1 C1LS0 0 0 0 0 0 0 0 0 Channel limiter select channels 5, 6, 7, 8 (0x2E) D7 D6 D5 D4 D3 D2 D1 D0 C8LS1 C8LS0 C7LS1 C7LS0 C6LS1 C6LS0 C5LS1 C5LS0 0 0 0 0 0 0 0 0 Limiter 1 attack/release rate (0x2F) D7 D6 D5 D4 D3 D2 D1 D0 L1A3 L1A2 L1A1 L1A0 L1R3 L1R2 L1R1 L1R0 0 1 1 0 1 0 1 0 DocID022647 Rev 5 45/84 Registers 5.2.45 5.2.46 5.2.47 5.2.48 STA321MP Limiter 1 attack/release threshold (0x30) D7 D6 D5 D4 D3 D2 D1 D0 L1AT3 L1AT2 L1AT1 L1AT0 L1RT3 L1RT2 L1RT1 L1RT0 0 1 1 0 1 0 0 1 Limiter 2 attack/release rate (0x31) D7 D6 D5 D4 D3 D2 D1 D0 L2A3 L2A2 L2A1 L2A0 L2R3 L2R2 L2R1 L2R0 0 1 1 0 1 0 1 0 Limiter 2 attack/release threshold (0x32) D7 D6 D5 D4 D3 D2 D1 D0 L2AT3 L2AT2 L2AT1 L2AT0 L2RT3 L2RT2 L2RT1 L2RT0 0 1 1 0 1 0 0 1 Limiter description The STA321MP includes two independent limiter blocks. The purpose of the limiters is to automatically reduce the dynamic range of a recording to prevent the outputs from clipping in anti-clipping mode or to actively reduce the dynamic range for a better listening environment such as a nighttime listening mode which is often needed for DVDs. The two modes are selected via the DRC bit in configuration register B, bit 7 address 0x02. Each channel can be mapped to either limiter or not mapped, meaning that the channel will clip when 0 dBFS is exceeded. Each limiter will look at the present value of each channel that is mapped to it, select the maximum absolute value of all these channels, perform the limiting algorithm on that value, and then, if needed, adjust the gain of the mapped channels in unison. The limiter attack thresholds are determined by the LnAT registers. It is recommended in anti-clipping mode to set this to 0 dBFS, which corresponds to the maximum unclipped output power of an FFX amplifier. Since gain can be added digitally within the STA321MP it is possible to exceed 0 dBFS or any other LnAT setting. When this occurs, the limiter, when active, will automatically start reducing the gain. The rate at which the gain is reduced when the attack threshold is exceeded is dependent upon the attack rate register setting for that limiter. The gain reduction occurs on a peak-detect algorithm. The release of the limiter, when the gain is again increased, is dependent on an RMS-detect algorithm. The output of the volume/limiter block is passed through an RMS filter. The output of this filter is compared to the release threshold, determined by the release threshold register. When the RMS filter output falls below the release threshold, the gain is again increased at a rate dependent upon the release rate register. The gain can never be increased past its set value and therefore the release will only occur if the limiter has already reduced the gain. The release threshold value can be used to set what is effectively a minimum dynamic range, this is helpful as overlimiting can reduce the dynamic range to virtually zero and cause program material to sound lifeless. 46/84 DocID022647 Rev 5 STA321MP Registers In AC mode the attack and release thresholds are set relative to full-scale. In DRC mode the attack threshold is set relative to the maximum volume setting of the channels mapped to that limiter and the release threshold is set relative to the maximum volume setting plus the attack threshold. Figure 9. Basic limiter and volume flow diagram Limiter RMS Attenuation Saturation Gain/Volume Input Output Gain CnLS[1,0] Channel limiter mapping 00 Channel has limiting disabled 01 Channel is mapped to limiter #1 10 Channel is mapped to limiter #2 LnA[3:0] Attack rate (dB/ms) 0000 3.1584 (fast) 0001 2.7072 0010 2.2560 0011 1.8048 0100 1.3536 0101 0.9024 0110 0.4512 0111 0.2256 1000 0.1504 1001 0.1123 1010 0.0902 1011 0.0752 1100 0.0645 1101 0.0564 1110 0.0501 1111 0.0451 (slow) DocID022647 Rev 5 47/84 Registers STA321MP LnR[3:0] Release rate (dB/ms) 0000 0.5116 (fast) 0001 0.1370 0010 0.0744 0011 0.0499 0100 0.0360 0101 0.0299 0110 0.0264 0111 0.0208 1000 0.0198 1001 0.0172 1010 0.0147 1011 0.0137 1100 0.0134 1101 0.0117 1110 0.0110 1111 0.0104 (slow) Anti-clipping (AC) (dB relative to FS) LnAT[3:0] 48/84 0000 -12 0001 -10 0010 -8 0011 -6 0100 -4 0101 -2 0110 0 0111 +2 1000 +3 1001 +4 1010 +5 1011 +6 1100 +7 1101 +8 1110 +9 1111 +10 DocID022647 Rev 5 STA321MP Registers Anti-clipping (AC) (dB relative to FS) LnRT[3:0] 0000 - 0001 -29 dB 0010 -20 dB 0011 -16 dB 0100 -14 dB 0101 -12 dB 0110 -10 dB 0111 -8 dB 1000 -7 dB 1001 -6 dB 1010 -5 dB 1011 -4 dB 1100 -3 dB 1101 -2 dB 1110 -1 dB 1111 -0 dB Dynamic range compression (DRC) (dB relative to volume) LnAT[3:0] 0000 -31 0001 -29 0010 -27 0011 -25 0100 -23 0101 -21 0110 -19 0111 -17 1000 -16 1001 -15 1010 -14 1011 -13 1100 -12 1101 -10 1110 -7 1111 -4 DocID022647 Rev 5 49/84 Registers STA321MP Dynamic range compression (DRC) (db relative to volume + LnAT) LnRT[3:0] 5.2.49 0000 - 0001 -38 dB 0010 -36 dB 0011 -33 dB 0100 -31 dB 0101 -30 dB 0110 -28 dB 0111 -26 dB 1000 -24 dB 1001 -22 dB 1010 -20 dB 1011 -18 dB 1100 -15 dB 1101 -12 dB 1110 -9 dB 1111 -6 dB Channel 1 and 2 output timing (0x33) D7 5.2.50 D4 C2OT2 C2OT1 1 0 D3 D2 D1 D0 C2OT0 C1OT2 C1OT1 C1OT0 0 0 0 0 D2 D1 D0 D6 D5 D4 D3 C4OT2 C4OT1 C4OT0 C3OT2 C3OT1 C3OT0 1 1 0 0 1 0 D2 D1 D0 Channel 5 and 6 output timing (0x35) D7 50/84 D5 Channel 3 and 4 output timing (0x34) D7 5.2.51 D6 D6 D5 D4 C6OT2 C6OT1 C6OT0 C5OT2 C5OT1 C5OT0 1 0 1 0 0 1 DocID022647 Rev 5 D3 STA321MP 5.2.52 Registers Channel 7 and 8 output timing (0x36) D7 D6 D5 D4 C8OT2 C8OT1 1 1 D3 D2 D1 D0 C8OT0 C7OT2 C7OT1 C7OT0 1 0 1 1 The centering of the individual channel PWM output periods can be adjusted by the output timing registers. The PWM slot settings can be chosen to ensure that pulse transitions do not occur at the same time on different channels using the same power device. There are 8 possible settings, the appropriate setting varies based on the application and connections to the FFX power devices. CnOT[2:0] 5.2.53 000 1 001 2 010 3 011 4 100 5 101 6 110 7 111 8 Coefficient address register 1 (0x3B) D7 5.2.54 5.2.55 PWM slot D6 D5 D4 D3 D2 D1 D0 CFA9 CFA8 0 0 Coefficient address register 2 (0x3C) D7 D6 D5 D4 D3 D2 D1 D0 CFA7 CFA6 CFA5 CFA4 CFA3 CFA2 CFA1 CFA0 0 0 0 0 0 0 0 0 Coefficient b1 data register, bits 23:16 (0x3D) D7 D6 D5 D4 D3 D2 D1 D0 C1B23 C1B22 C1B21 C1B20 C1B19 C1B18 C1B17 C1B16 0 0 0 0 0 0 0 0 DocID022647 Rev 5 51/84 Registers 5.2.56 5.2.57 5.2.58 5.2.59 5.2.60 5.2.61 5.2.62 52/84 STA321MP Coefficient b1 data register, bits 15:8 (0x3E) D7 D6 D5 D4 D3 D2 D1 D0 C1B15 C1B14 C1B13 C1B12 C1B11 C1B10 C1B9 C1B8 0 0 0 0 0 0 0 0 Coefficient b1 data register, bits 7:0 (0x3F) D7 D6 D5 D4 D3 D2 D1 D0 C1B7 C1B6 C1B5 C1B4 C1B3 C1B2 C1B1 C1B0 0 0 0 0 0 0 0 0 Coefficient b2 data register, bits 23:16 (0x40) D7 D6 D5 D4 D3 D2 D1 D0 C2B23 C2B22 C2B21 C2B20 C2B19 C2B18 C2B17 C2B16 0 0 0 0 0 0 0 0 Coefficient b2 data register, bits 15:8 (0x41) D7 D6 D5 D4 D3 D2 D1 D0 C2B15 C2B14 C2B13 C2B12 C2B11 C2B10 C2B9 C2B8 0 0 0 0 0 0 0 0 Coefficient b2 data register, bits 7:0 (0x42) D7 D6 D5 D4 D3 D2 D1 D0 C2B7 C2B6 C2B5 C2B4 C2B3 C2B2 C2B1 C2B0 0 0 0 0 0 0 0 0 Coefficient a1 data register, bits 23:16 (0x43) D7 D6 D5 D4 D3 D2 D1 D0 C1B23 C1B22 C1B21 C1B20 C1B19 C1B18 C1B17 C1B16 0 0 0 0 0 0 0 0 Coefficient a1 data register, bits 15:8 (0x44) D7 D6 D5 D4 D3 D2 D1 D0 C3B15 C3B14 C3B13 C3B12 C3B11 C3B10 C3B9 C3B8 0 0 0 0 0 0 0 0 DocID022647 Rev 5 STA321MP 5.2.63 5.2.64 5.2.65 5.2.66 5.2.67 5.2.68 5.2.69 Registers Coefficient a1 data register, bits 7:0 (0x45) D7 D6 D5 D4 D3 D2 D1 D0 C3B7 0 C3B6 0 C3B5 0 C3B4 0 C3B3 0 C3B2 0 C3B1 0 C3B0 0 Coefficient a2 data register, bits 23:16 (0x46) D7 D6 D5 D4 D3 D2 D1 D0 C4B23 C4B22 C4B21 C4B20 C4B19 C4B18 C4B17 C4B16 0 0 0 0 0 0 0 0 Coefficient a2 data register, bits 15:8 (0x47) D7 D6 D5 D4 D3 D2 D1 D0 C4B15 0 C4B14 0 C4B13 0 C4B12 0 C4B11 0 C4B10 0 C4B9 0 C4B8 0 Coefficient a2 data register, bits 7:0 (0x48) D7 D6 D5 D4 D3 D2 D1 D0 C4B7 0 C4B6 0 C4B5 0 C4B4 0 C4B3 0 C4B2 0 C4B1 0 C4B0 0 Coefficient b0 data register, bits 23:16 (0x49) D7 D6 D5 D4 D3 D2 D1 D0 C5B23 C5B22 C5B21 C5B20 C5B19 C5B18 C5B17 C5B16 0 0 0 0 0 0 0 0 Coefficient b0 data register, bits 15:8 (0x4A) D7 D6 D5 D4 D3 D2 D1 D0 C5B15 C5B14 C5B13 C5B12 C5B11 C5B10 C5B9 C5B8 0 0 0 0 0 0 0 0 Coefficient b0 data register, bits 7:0 (0x4B) D7 D6 D5 D4 D3 D2 D1 D0 C5B7 C5B6 C5B5 C5B4 C5B3 C5B2 C5B1 C5B0 0 0 0 0 0 0 0 0 DocID022647 Rev 5 53/84 Registers 5.2.70 STA321MP Coefficient write control register (0x4C) D7 D6 D5 D4 D3 D2 D1 D0 WA W1 0 0 Coefficients for EQ and Bass Management are handled internally in the STA321MP via RAM. Access to this RAM is available to the user via an I2C register interface. A collection of I2C registers are dedicated to this function. One contains a coefficient base address, five sets of three store the values of the 24-bit coefficients to be written or that were read, and one contains bits used to control the write of the coefficient(s) to RAM. The following are instructions for reading and writing coefficients. 54/84 DocID022647 Rev 5 STA321MP 5.3 5.4 Registers Reading a coefficient from RAM 1. Write the top 2 bits of address to I2C register 0x3B 2. Write the bottom 8 bits of address to I2C register 0x3C 3. Read the top 8 bits of coefficient in I2C address 0x3D 4. Read the middle 8 bits of coefficient in I2C address 0x3E 5. Read the bottom 8 bits of coefficient in I2C address 0x3F Reading a set of coefficients from RAM 1. Write the top 2 bits of address to I2C register 0x3B 2. Write the bottom 8 bits of address to I2C register 0x3C 3. Read the top 8 bits of coefficient in I2C address 0x3D 4. Read the middle 8 bits of coefficient in I2C address 0x3E 5. Read the bottom 8 bits of coefficient in I2C address 0x3F 6. Read the top 8 bits of coefficient b2 in I2C address 0x40 7. Read the middle 8 bits of coefficient b2 in I2C address 0x41 8. Read the bottom 8 bits of coefficient b2 in I2C address 0x42 9. Read the top 8 bits of coefficient a1 in I2C address 0x43 10. Read the middle 8 bits of coefficient a1 in I2C address 0x44 11. Read the bottom 8 bits of coefficient a1 in I2C address 0x45 12. Read the top 8 bits of coefficient a2 in I2C address 0x46 13. Read the middle 8 bits of coefficient a2 in I2C address 0x47 14. Read the bottom 8 bits of coefficient a2 in I2C address 0x48 15. Read the top 8 bits of coefficient b0 in I2C address 0x49 16. Read the middle 8 bits of coefficient b0 in I2C address 0x4A 17. Read the bottom 8 bits of coefficient b0 in I2C address 0x4B 5.5 Writing a single coefficient to RAM 1. Write the top 2 bits of address to I2C register 0x3B 2. Write the bottom 8 bits of address to I2C register 0x3C 3. Write the top 8 bits of coefficient in I2C address 0x3D 4. Write the middle 8 bits of coefficient in I2C address 0x3E 5. Write the bottom 8 bits of coefficient in I2C address 0x3F 6. Write 1 to the W1 bit in I2C address 0x4C DocID022647 Rev 5 55/84 Registers 5.6 STA321MP Writing a set of coefficients to RAM 1. Write the top 2 bits of starting address to I2C register 0x3B 2. Write the bottom 8 bits of starting address to I2C register 0x3C 3. Write the top 8 bits of coefficient b1 in I2C address 0x3D 4. Write the middle 8 bits of coefficient b1 in I2C address 0x3E 5. Write the bottom 8 bits of coefficient b1 in I2C address 0x3F 6. Write the top 8 bits of coefficient b2 in I2C address 0x40 7. Write the middle 8-bits of coefficient b2 in I2C address 0x41 8. Write the bottom 8 bits of coefficient b2 in I2C address 0x42 9. Write the top 8 bits of coefficient a1 in I2C address 0x43 10. Write the middle 8 bits of coefficient a1 in I2C address 0x44 11. Write the bottom 8 bits of coefficient a1 in I2C address 0x45 12. Write the top 8 bits of coefficient a2 in I2C address 0x46 13. Write the middle 8 bits of coefficient a2 in I2C address 0x47 14. Write the bottom 8 bits of coefficient a2 in I2C address 0x48 15. Write the top 8-bits of coefficient b0 in I2C address 0x49 16. Write the middle 8 bits of coefficient b0 in I2C address 0x4A 17. Write the bottom 8 bits of coefficient b0 in I2C address 0x4B 18. Write 1 to the WA bit in I2C address 0x4C The mechanism for writing a set of coefficients to RAM provides a method of updating the five coefficients corresponding to a given biquad (filter) simultaneously to avoid possible unpleasant acoustic side-effects. When using this technique, the 10-bit address would specify the address of the biquad b1 coefficient (for example, decimals 0, 5, 10, 15, ..., 100, ... 395), and the STA321MP will generate the RAM addresses as offsets from this base value to write the complete set of coefficient data. 56/84 DocID022647 Rev 5 STA321MP 6 Configuration registers (0x77; 0x78; 0x79) Configuration registers (0x77; 0x78; 0x79) CBQ1 (reg 0x77) D7 D6 D5 D4 D3 D2 D1 D0 EBQ3_1 EBQ3_0 EBQ2_1 EBQ2_0 EBQ1_1 EBQ1_0 EBQ0_0 EBQ0_0 0 0 0 0 0 0 0 0 CBQ2 (reg 0x78) D7 D6 D5 D4 D3 D2 D1 D0 EBQ7_1 EBQ7_0 EBQ6_1 EBQ6_0 EBQ5_1 EBQ5_0 EBQ4_1 EBQ4_0 0 0 0 0 0 0 0 0 D5 D4 D3 D2 D1 D0 nshen EBQ9_1 EBQ9_0 EBQ8_1 EBQ8_0 1 0 0 0 0 CBQ3 (reg 0x79) D7 D6 0 0 0 The STA321MP EQ biquads use the following equation: Y[n] = 2 * (b0 / 2) * X[n] + 2 * (b1 / 2) * X[n-1] + b2 * X[n-2] - 2 * (a1 / 2) * Y[n-1] - a2 * Y[n-2] = b0 * X[n] + b1 * X[n-1] + b2 * X[n-2] - a1 * Y[n-1] - a2 * Y[n-2] where Y[n] represents the output and X[n] represents the input. Multipliers are 24-bit signed fractional multipliers, with coefficient values in the range of 0x800000 (-1) to 0x7FFFFF (0.9999995231628). The default coefficient range (+/-1) can be reconfigured to 2 or 4 with the 0x77, 0x78 and 0x79 I2C registers. The coefficients range setting is common for all the channels. (EBQx_1;EBQx_0)="00": Biquad x use +/-1 range (EBQx_1;EBQx_0)="01": Biquad x use +/-2 range (EBQx_1;EBQx_0)="10": Biquad x use +/-4 range (EBQx_1;EBQx_0)="11": reserved Coefficients stored in the user-defined coefficient RAM are referenced in the following manner: CxHy0 = b1 / 2 CxHy1 = b2 CxHy2 = -a1 / 2 CxHy3 = -a2 CxHy4 = b0 / 2 where x represents the channel and the y the biquad number. For example, C0H41 is the b2 coefficient in the fourth biquad for channel 2. DocID022647 Rev 5 57/84 Configuration registers (0x77; 0x78; 0x79) STA321MP By default, all user-defined filters are pass-through where all coefficients are set to 0, except the b0/2 coefficient which is set to 0x400000 (representing 0.5). Mix coefficients use only 1 range. A special feature inside the digital processing block is available (active when the nshen bit is set to `1'). In case of poles positioned at very low frequencies, biquads filters can generate some audible quantization noise or unwanted DC level. In order to avoid this kind of effect a quantization noise-shaping capability can be used. The filter structure including this special feature, relative to each biquad is shown in Figure 10. The new feature can be enabled independently for each biquad using the I2C registers. The D7 bit, when set, is responsible for activating this function on the crossover filter while the other bits address any specific biquads according to the previous table. Channels 1 and 2 share the same settings. Bit D7 is effective also for channel 3 if the related OCFG is used. Figure 10. Biquad filter structure with quantization error noise shaping In(t) b0 z-1 - + Q z-1 Out(t) z-1 b1 a1 z-1 z-1 b2 a2 Figure 11. Channel mixer CxMIX1 Channel 1 CxMIX2 Channel 2 CxMIX3 Channel 3 CxMIX4 Channel 4 CxMIX5 Channel 5 CxMIX6 Channel 6 CxMIX7 Channel 7 CxMIX8 Channel 8 58/84 DocID022647 Rev 5 Channel x STA321MP 6.1 Configuration registers (0x77; 0x78; 0x79) Post-scale The STA321MP provides one additional multiplication after the last interpolation stage and before the distortion compensation on each channel. This is a 24-bit signed fractional multiply. The scale factor for this multiply is loaded into RAM using the same I2C registers as the biquad coefficients and the bass-management. This post-scale factor can be used in conjunction with an ADC-equipped microcontroller to perform power-supply error correction. All channels can use the channel 1 by setting the post-scale link bit. Table 12. RAM block for biquads, mixing, and bass management Index Index (decimal) (hex) 0 0x00 1 Parameter Channel 1 - Biquad 1 Coefficient Default C1H10 (b1/2) 0x000000 0x01 C1H11 (b2) 0x000000 2 0x02 C1H12 (a1/2) 0x000000 3 0x03 C1H13 (a2) 0x000000 4 0x04 C1H14 (b0/2) 0x400000 5 0x05 Channel 1 - Biquad 2 C1H20 0x000000 ... ... ... ... ... 49 0x31 Channel 1 - Biquad 10 C1HA4 0x400000 50 0x32 Channel 2 - Biquad 1 C2H10 0x000000 51 0x33 C2H11 0x000000 ... ... ... ... ... 99 0x63 Channel 2 - Biquad 10 C2HA4 0x4000000 100 0x64 Channel 3 - Biquad 1 C3H10 0x000000 ... ... ... ... ... 399 0x18F Channel 8 - Biquad 10 C8HA4 0x400000 400 0x190 Channel 1 - Pre-scale C1PreS 0x7FFFFF 401 0x191 Channel 2 - Pre-scale C2PreS 0x7FFFFF 402 0x192 Channel 3 - Pre-scale C3PreS 0x7FFFFF ... ... ... ... ... 407 0x197 Channel 8 - Pre-scale C8PreS 0x7FFFFF 408 0x198 Channel 1 - Post-scale C1PstS 0x7FFFFF 409 0x199 Channel 2 - Post-scale C2PstS 0x7FFFFF ... ... ... ... ... 415 0x19F Channel 8 - Post-scale C8PstS 0x7FFFFF 416 0x1A0 Channel 1 - Mix# 1 1 C1MX11 0x7FFFFF DocID022647 Rev 5 59/84 Configuration registers (0x77; 0x78; 0x79) STA321MP Table 12. RAM block for biquads, mixing, and bass management (continued) 60/84 Index Index (decimal) (hex) Parameter Coefficient Default 417 0x1A1 Channel 1 - Mix#1 2 C1MX12 0x000000 ... ... ... ... ... 423 0x1A7 Channel 1 - Mix#1 8 C1MX18 0x000000 424 0x1A8 Channel 2 - Mix#1 1 C2MX11 0x000000 425 0x1A9 Channel 2 - Mix#1 2 C2MX12 0x7FFFFF ... ... ... ... ... 479 0x1DF Channel 8 - Mix#1 8 C8MX18 0x7FFFFF 480 0x1E0 Channel 1 - Mix#2 1 C1MX21 0x7FFFFF 481 0x1E1 Channel 1 - Mix#2 2 C1MX22 0x000000 ... ... ... ... ... 487 0x1E7 Channel 1 - Mix#2 8 C1MX28 0x000000 488 0x1E8 Channel 2 - Mix#2 1 C2MX21 0x000000 489 0x1E9 Channel 2 - Mix#2 2 C2MX22 0x7FFFFF ... ... ... ... ... 543 0x21F Channel 8 - Mix#2 8 C8MX28 0x7FFFFF DocID022647 Rev 5 STA321MP Configuration registers (0x77; 0x78; 0x79) 6.2 Variable max power correction 6.2.1 MPCC1-2 (0x4D, 0x4E) MPCC bits determine the 16 MSBs of the MPC compensation coefficient. This coefficient is used in place of the default coefficient when MPCV = 1. D7 D6 D5 D4 D3 D2 D1 D0 MPCC15 MPCC14 MPCC13 MPCC12 MPCC11 MPCC10 MPCC9 MPCC8 0 0 1 0 1 1 0 1 D7 D6 D5 D4 D3 D2 D1 D0 MPCC7 MPCC6 MPCC5 MPCC4 MPCC3 MPCC2 MPCC1 MPCC0 1 1 0 0 0 0 0 0 6.3 Variable distortion compensation 6.3.1 DCC1-2 (0x4F, 0x50) The DCC bits determine the 16 MSBs of the distortion compensation coefficient. This coefficient is used in place of the default coefficient when DCCV = 1. D7 D6 D5 D4 D3 D2 D1 D0 DCC15 DCC14 DCC13 DCC12 DCC11 DCC10 DCC9 DCC8 1 1 1 1 0 0 1 1 D7 D6 D5 D4 D3 D2 D1 D0 DCC7 DCC6 DCC5 DCC4 DCC3 DCC2 DCC1 DCC0 0 0 1 1 0 0 1 1 DocID022647 Rev 5 61/84 Configuration registers (0x77; 0x78; 0x79) 6.4 STA321MP PSCorrect registers An ADC is used to input ripple data to SDI78. The left channel (7) is used internally. No audio data can therefore be used on these channels, although all channel mapping and mixing from other inputs to channels 7 and 8 internally are still valid. 6.4.1 PSC1-2: ripple correction value (RCV) (0x51, 0x52) This value is equivalent to the negative maximum ripple peak as a percentage of Vcc (MPR), scaled by the inverse of the maximum ripple p-p as a percentage of the full-scale analog input to the ADC. It is represented as a 1.11 signed fractional number. 6.4.2 D7 D6 D5 D4 D3 D2 D1 D0 RCV11 RCV10 RCV9 RCV8 RCV7 RCV6 RCV5 RCV4 0 0 0 0 0 0 0 0 D7 D6 D5 D4 D3 D2 D1 D0 RCV3 RCV2 RCV1 RCV0 CNV11 CNV10 CNV9 CNV8 0 0 0 0 1 1 1 1 PSC3: correction normalization value (CNV) (0x53) This value is equivalent to 1 / (1+MPR) expressed as a 0.12 unsigned fractional number. D7 D6 D5 D4 D3 D2 D1 D0 CNV7 CNV6 CNV5 CNV4 CNV3 CNV2 CNV1 CNV0 1 1 1 1 1 1 1 1 6.5 PDM and recombination IP 6.5.1 Mike recombination RAM BIST (0x5C) 62/84 D7 D6 D5 D4 D3 D2 D1 D0 MHFail MHBad MHEnd MHAct MNFail MNBad MNEnd MNAct 0 0 0 0 0 0 0 0 DocID022647 Rev 5 STA321MP 6.5.2 Configuration registers (0x77; 0x78; 0x79) Bit RW RST Name Description 7 RW 0 MHFail `1' : MHBist computation bit fail 6 RW 0 MHBad `1' : MHBist computation bad 5 RW 0 MHEnd `1' : MHBist computation finished 4 RW 0 MHAct `1' : MHBist computation start 3 RW 0 MNFail `1' : MNBist computation bit fail 2 RW 0 MNBad `1' : MNBist computation bad 1 RW 0 MNEnd `1' : MNBist computation finished 0 RW 0 MNAct `1' : MNBist computation start Recombination control register 1 (0x5D) D7 D6 D5 D4 D3 Boost6db 0 0 0 0 0 D2 D1 D0 mike_en mike_byp m_mode 0 0 0 Bit RW RST Name Description 7 RW 0 Boost6dB(1) '1': Output (after recombination) multiplied x2 '0': Output (after recombination) as it is 6 RW 0 5 RW 0 4 RW 0 3 RW 0 2 RW 0 mike_en '1': Microphone recombination IP is active `0': Microphone recombination IP is not active (acts like an HW Bypass) 1 RW 0 mike_byp '1': Microphone recombination is bypassed '0': Microphone recombination is used 0 RW 0 m_mode '1': Auto-configuration of the CLKOUT generator to Fout = sys_clk/32 '0': CLKOUT is configured only through COS bits 1. Mike recomb only DocID022647 Rev 5 63/84 Configuration registers (0x77; 0x78; 0x79) 6.5.3 6.5.4 STA321MP PDM control register (0x5E) D7 D6 D5 D4 D3 D2 AdvM6 AdvM5 AdvM4 AdvM3 AdvM2 AdvM1 0 0 0 0 0 0 Bit RW RST Name 7 RW AdvM6 6 RW AdvM5 5 RW AdvM4 4 RW AdvM3 3 RW AdvM2 2 RW AdvM1 1 RW 0 RW D0 PDMSM[1:0] 0 0 Description PDMSM PDM channel x sampling edge configuration: '1': rising edge (of internal _CLK) '0': falling edge (of internal _CLK) (Active in Advance mode only, PDMSM = '11') 00: Normal mode 01: reserved 10: Dual-membrane 11: Advanced Recombination control register 2, 3 and 4 (0x5F; 0x60; 0x61) D7 D6 D5 D4 D3 bypRM1 D2 D1 D0 CH1GG[5:0] 0 0 1 0 0 0 0 0 D7 D6 D5 D4 D3 D2 D1 D0 bypRM2 CH2GG[5:0] 0 0 1 0 0 0 0 0 D7 D6 D5 D4 D3 D2 D1 D0 0 0 bypRM3 0 64/84 D1 0 CH3GG[5:0] 1 RST 0 Bit RW 7 RW reserved 6 RW bypRMx 5 RW 4 RW 3 RW 2 RW 1 RW 0 RW 0 Name CHxGG[5:0] 0 Description '1': Recombination of Mike_x is bypassed '0': Recombination of Mike_x is active see Table 13 DocID022647 Rev 5 STA321MP Configuration registers (0x77; 0x78; 0x79) Table 13. Gain adjustment (sensitivity) Index dB Index dB Index dB 0x00 -4 0x16 -1.25 0x2C 1.5 0x01 -3.875 0x17 -1.125 0x2D 1.625 0x02 -3.75 0x18 -1 0x2E 1.75 0x03 -3.625 0x19 -0.875 0x2F 1.875 0x04 -3.5 0x1A -0.75 0x30 2 0x05 -3.375 0x1B -0.625 0x31 2.125 0x06 -3.25 0x1C -0.5 0x32 2.25 0x07 -3.125 0x1D -0.375 0x33 2.375 0x08 -3 0x1E -0.25 0x34 2.5 0x09 -2.875 0x1F -0.125 0x35 2.625 0x0A -2.75 0x20 0 0x36 2.75 0x0B -2.625 0x21 0.125 0x37 2.875 0x0C -2.5 0x22 0.25 0x38 3 0x0D -2.375 0x23 0.375 0x39 3.125 0x0E -2.25 0x24 0.5 0x3A 3.25 0x0F -2.125 0x25 0.625 0x3B 3.375 0x10 -2 0x26 0.75 0x3C 3.5 0x11 -1.875 0x27 0.875 0x3D 3.625 0x12 -1.75 0x28 1 0x3E 3.75 0x13 -1.625 0x29 1.125 0x3F 3.875 0x14 -1.5 0x2A 1.25 0x15 -1.375 0x2B 1.375 DocID022647 Rev 5 65/84 Configuration registers (0x77; 0x78; 0x79) 6.5.5 STA321MP Recombination control register 5, 6 and 7 (0x62; 0x63; 0x64) D7 D6 D5 D4 D3 LP1en D1 D0 CH1NCA[5:0] 0 1 1 0 0 0 0 0 D7 D6 D5 D4 D3 D2 D1 D0 LP2en CH2NCA[5:0] 0 1 1 0 0 0 0 0 D7 D6 D5 D4 D3 D2 D1 D0 0 0 LP3en 0 CH3NCA[5:0] 1 Bit RW 7 RW 6 RW 5 RW 4 RW 3 RW 2 RW 1 RW 0 RW 1 RST 0 0 Name LPxen CHxNCA[5:0] 66/84 D2 0 Description '1': Low-pass filter of mike x is enabled '0': Low-pass filter of mike x is not enabled see Table 14 DocID022647 Rev 5 STA321MP Configuration registers (0x77; 0x78; 0x79) Table 14. Normal channel attenuation Index dB Index dB Index dB 0x00 0 0x16 18.75 0x2C 21.5 0x01 10.5 0x17 18.875 0x2D 21.625 0x02 11 0x18 19 0x2E 21.75 0x03 11.5 0x19 19.125 0x2F 21.875 0x04 12 0x1A 19.25 0x30 22 0x05 12.5 0x1B 19.375 0x31 22.5 0x06 13 0x1C 19.5 0x32 23 0x07 13.5 0x1D 19.625 0x33 23.5 0x08 14 0x1E 19.75 0x34 24 0x09 14.5 0x1F 19.875 0x35 24.5 0x0A 15 0x20 20 0x36 25 0x0B 15.5 0x21 20.125 0x37 25.5 0x0C 16 0x22 20.25 0x38 26 0x0D 16.5 0x23 20.375 0x39 26.5 0x0E 17 0x24 20.5 0x3A 27 0x0F 17.5 0x25 20.625 0x3B 27.5 0x10 18 0x26 20.75 0x3C 28 0x11 18.125 0x27 20.875 0x3D 28.5 0x12 18.25 0x28 21 0x3E 29 0x13 18.375 0x29 21.125 0x3F 29.5 0x14 18.5 0x2A 21.25 0x15 18.625 0x2B 21.375 DocID022647 Rev 5 67/84 Configuration registers (0x77; 0x78; 0x79) 6.5.6 STA321MP Recombination control register 8, 9 and 10 (0x65; 0x66; 0x67) D7 D6 D5 D4 D3 D2 D1 D0 CH1TH_N[5:0] 0 0 1 1 0 0 1 1 D7 D6 D5 D4 D3 D2 D1 D0 CH2TH_N[5:0] 0 0 1 1 0 0 1 1 D7 D6 D5 D4 D3 D2 D1 D0 1 1 CH3TH_N[5:0] 0 0 Bit RW 7 RW 6 RW 5 RW 4 RW 3 RW 2 RW 1 RW 0 RW 1 RST 1 0 Name Description Reserved CHxTH_N[5:0] 68/84 0 see Table 15 DocID022647 Rev 5 STA321MP Configuration registers (0x77; 0x78; 0x79) Table 15. Threshold configuration 6.5.7 Index dB Index dB Index dB Index dB Index dB Index dB 0x00 0 0x0B -11 0x16 -22 0x21 -33 0x2C -44 0x37 -55 0x01 -1 0x0C -12 0x17 -23 0x22 -34 0x2D -45 0x38 -56 0x02 -2 0x0D -13 0x18 -24 0x23 -35 0x2E -46 0x39 -57 0x03 -3 0x0E -14 0x19 -25 0x24 -36 0x2F -47 0x3A -58 0x04 -4 0x0F -15 0x1A -26 0x25 -37 0x30 -48 0x3B -59 0x05 -5 0x10 -16 0x1B -27 0x26 -38 0x31 -49 0x3C -60 0x06 -6 0x11 -17 0x1C -28 0x27 -39 0x32 -50 0x3D -61 0x07 -7 0x12 -18 0x1D -29 0x28 -40 0x33 -51 0x3E -62 0x08 -8 0x13 -19 0x1E -30 0x29 -41 0x34 -52 0x3F -63 0x09 -9 0x14 -20 0x1F -31 0x2A -42 0x35 -53 0x0A -10 0x15 -21 0x20 -32 0x2B -43 0x36 -54 Recombination control register 11, 12 and 13 (0x68; 0x69; 0x6A) D7 D6 D5 D4 D3 D2 D1 D0 CH1TH_H[5:0] 0 0 0 1 1 0 1 1 D7 D6 D5 D4 D3 D2 D1 D0 CH2TH_H[5:0] 0 0 0 1 1 0 1 1 D7 D6 D5 D4 D3 D2 D1 D0 1 1 CH3TH_H[5:0] 0 0 0 Bit RW RST 7 RW 0 6 RW 0 5 RW 0 4 RW 1 3 RW 1 2 RW 0 1 RW 1 0 RW 1 1 1 Name 0 Description Reserved CHxHCT[5:0] see Table 15 DocID022647 Rev 5 69/84 Configuration registers (0x77; 0x78; 0x79) 6.5.8 STA321MP Zero-mute threshold/hysteresis and RMS zero-mute selectors (0x6F) Zero-mute (0x6F) D7 D6 D5 D4 D3 D2 D1 D0 RMSZS2 RMSZS1 RMSZS0 ZMTHS2 ZMTHS1 ZMTHS0 ZMHYS1 ZMHYS0 0 0 0 0 0 0 0 0 Bit RW RST Name 7 RW 0 RMSZS2 6 RW 0 RMSZS1 5 RW 0 RMSZS0 4 RW 0 ZMTHS2 3 RW 0 ZMTHS1 2 RW 0 ZMTHS1 1 RW 0 ZMHYS1 0 RW 0 ZMHYS0 Description Select channel for reading the zero-mute RMS level on registers rmsZMH (0x7A) & rmsZML (0x7B). Select the zero-mute threshold level. If signal is below this level, output will be in switch off mode. Select the hysteresis window width. The STA321MP implements an RMS-based zero-detect function (on serial input interface data) able to detect in a very reliable way the presence of an input signal, so that the power bridge outputs can be automatically connected to ground. When active, the function will mute the output PWM when the input level become less than threshold - hysteresis. Once muted, the PWM will be unmuted when the input level is detected greater than threshold + hysteresis . The measured level is then reported (each input channel is selected by RMSZS[2:0] value) on registers 0x7A, 0x7B. Table 16. RMS channel select 70/84 RMSZS[2:0] Channel 000 1 001 2 010 3 011 4 100 5 101 6 110 7 111 8 DocID022647 Rev 5 STA321MP Configuration registers (0x77; 0x78; 0x79) Table 17. Zero-detect threshold ZMTHS[2:0] Equivalent input level (dB) 000 -78 001 -84 010 -90 011 -96 100 -102 101 -108 110 -114 111 -114 Table 18. Zero-detect hysteresis ZMHYS[1:0] Equivalent input level hysteresis(dB) 00 3 01 4 10 5 11 6 DocID022647 Rev 5 71/84 Configuration registers (0x77; 0x78; 0x79) 6.5.9 STA321MP RMS post-processing selectors and Fs autodetection (0x70) D7 D6 D5 D4 RMSOS2 RMSOS1 RMSOS0 0 0 0 D3 D2 D1 D0 FXLRC0 0 0 0 0 0 RMS out selector Bit RW RST Name Description 7 RW 0 RMSOS2 6 RW 0 RMSOS1 5 RW 0 RMSOS0 RMS post-processing selectors. For each channel the current RMS value after the processing step is available on registers rmsPOH (0x7C) and rmsPOL (0x7D). Table 19. RMS post-processing channel select RMSOS[2:0] Channel 000 1 001 2 010 3 011 4 100 5 101 6 110 7 111 8 Fs autodetection Bit 0 72/84 RW RW RST 0 Name FXLRC0 Description If set to 1, the IR and BST32K parameters are auto-selected by the Fs autodetection internal block; otherwise, the I2C register values are used. DocID022647 Rev 5 STA321MP 6.5.10 Configuration registers (0x77; 0x78; 0x79) Clock manager configuration PLL configuration registers (0x71, 0x72, 0x73, 0x74) PLL multiplication factor (fractional part, H) (0x71) D7 D6 D5 D4 D3 D2 D1 D0 0 0 0 D2 D1 D0 0 0 0 PLLFI[15:8] 0 0 0 0 0 PLL multiplication factor (fractional part, L) (0x72) D7 D6 D5 D4 D3 PLLFI[7:0] 0 0 0 0 0 PLL multiplication factor (integral part) named as N Division Factor (NDIV) and dithering (0x73) D7 D6 D5 D4 D3 PLLDD[1:0] 0 D2 D1 D0 0 0 PLLND[5:0] 0 0 0 Bit RW RST Name 7 RW 0 PLLDD1 6 RW 0 PLLDD0 5 RW 0 PLLND5 4 RW 0 PLLND4 3 RW 0 PLLND3 2 RW 1 PLLND2 1 RW 0 PLLND1 0 RW 1 PLLND0 0 0 Description PLL dithering: 00 : PLL clock dithering disabled 01 : PLL clock dithering enabled (triangular) 10 : PLLclock dithering enabled (rectangular) 11 : reserved N (loop) Division Factor This factor should be: DocID022647 Rev 5 5 N DIV 55 73/84 Configuration registers (0x77; 0x78; 0x79) STA321MP PLL input division factor and others (0x74) D7 D6 D5 D4 D3 D2 D1 D0 PDPDC PLLFC PLSTRB PLSTBB PLIDF3 PLIDF2 PLIDF1 PLIDF0 0 0 0 0 0 0 0 0 By default the STA321MP is able to configure the embedded PLL automatically depending on the MCS bits (reg 0x00). For certain applications and to provide flexibility to the user, a manual PLL configuration can be used (setting PLLFC to 1). The output PLL frequency formula is: Fin FI Fout = ---------- ND + -------IDF 2 16 when PLLFC = 1 Fin Fout = ---------- ND IDF when PLLFC = 0 Clock manager configuration register (0x75) D7 D5 D4 D3 D2 D1 D0 PLLBYP PLLDPR LOWEN BST32K 0 0 0 0 Bit RW RST Name 3 RW 0 PLLBYP PLL bypass enable `0': disabled `1': bypassed PLLDPR PLL direct programming `0': PLL configuration depends on MCS `1': PLL configuration depends on I2C regs (0x72, 0x73 and 0x74) 2 74/84 D6 RW 0 Description 1 RW 0 LOWEN Low clock enable `0': if input clock is too slow, master clock will become the internal oscillator clock (20 MHz), PLL bypassed `1': disabled 0 RW 0 BST32K Boost oversampling for fs = 32 kHz `0': disabled `1': input oversampling is selected x 3 DocID022647 Rev 5 STA321MP Configuration registers (0x77; 0x78; 0x79) Clock manager status register (0x76) D7 6.5.11 D6 D5 D4 D3 D2 D1 D0 PLLBYS PLLPDS OSCOK LOWCKS 0 0 0 0 Bit RW RST Name 3 R 0 PLLBYS PLL bypass status `0': normal `1': bypassed 2 R 0 PLLPDS PLL power-down status `0': normal `1': standby Oscillator clock OK `0': not ready `1': ready 1 R 0 OSCOK 0 R 0 LOWCKS Description Low clock status `0': normal `1': input clock too slow RMS level registers (0x7A, 0x7B, 0x7C, 0x7D) Two set of registers are available to monitor the RMS level detected by the zero-mute block and after the signal processing. The measured level for a selected channel is given in 0x7A & 0x7B (zero-mute level) and 0x7C & 0x7D (PWM out level) according to the following expression: Value(dB) = 20Log(rms[15:0]/(216 x 0.635)) where rms[15:0] is an unsigned integer formed by: rms[15:0] = rmsZMH[7:0], rmsZML[7:0] for zero-mute level or rms[15:0] = rmsPOH[7:0], rmsPOL[7:0] for PWM output level DocID022647 Rev 5 75/84 Configuration registers (0x77; 0x78; 0x79) STA321MP rmsZMx D7 D6 D5 D4 D3 D2 D1 D0 RZM15 RZM14 RZM13 RZM12 RZM11 RZM10 RZM9 RZM8 0 0 0 0 0 0 0 0 RZM7 RZM6 RZM5 RZM4 RZM3 RZM2 RZM1 RZM0 0 0 0 0 0 0 0 0 rmsZMH Bit RW RST Name Description 7 R RZM15 6 R RZM14 5 R RZM13 4 R RZM12 3 R RZM11 2 R RZM10 1 R RZM9 0 R RZM8 RMS zero-detect level register, H rmsZML Bit RW RST Name 7 R RZM7 6 R RZM6 5 R RZM5 4 R RZM4 3 R RZM3 2 R RZM2 1 R RZM1 0 R RZM0 Description RMS zero detect level register, L rmsPOx 76/84 D7 D6 D5 D4 D3 D2 D1 D0 RPO15 RPO14 RPO13 RPO12 RPO11 RPO10 RPO9 RPO8 0 0 0 0 0 0 0 0 RPO7 RPO6 RPO5 RPO4 RPO3 RPO2 RPO1 RPO0 0 0 0 0 0 0 0 0 DocID022647 Rev 5 STA321MP Configuration registers (0x77; 0x78; 0x79) rmsPOH Bit RW RST Name 7 R RPO15 6 R RPO14 5 R RPO13 4 R RPO12 3 R RPO11 2 R RPO10 1 R RPO9 0 R RPO8 Description RMS PWM out (post-processing) register, H rmsPOL Bit RW RST Name 7 R RPO7 6 R RPO6 5 R RPO5 4 R RPO4 3 R RPO3 2 R RPO2 1 R RPO1 0 R RPO0 Description RMS PWM out (post-processing) register, L DocID022647 Rev 5 77/84 Startup/shutdown pop noise removal STA321MP 7 Startup/shutdown pop noise removal 7.1 DPT: PWM and tristate delay (0x80) D7 7.2 D5 D4 D3 D2 D1 D0 DPT4 DPT3 DPT2 DPT1 DPT0 1 1 1 0 0 Bit RW RST Name 0 RW 0 DPT0 1 RW 0 DPT1 2 RW 1 DPT2 3 RW 1 DPT3 4 RW 1 DPT4 Description Set a delay between the PWM and the tristate signal to compensate the external amplifier delay. Configuration register (0x81) D7 D6 D5 D4 D3 D2 D1 D0 RL3 RL2 RL1 RL0 RD SID1 FBYP RTP 0 0 0 0 0 1 0 1 RST Name Bit 78/84 D6 RW 0 RW 1 RTP Bit RW RST Name 1 RW 0 FBYP Description Remove tristate initial pulses 1: remove the tristate initilal pulses with frequency less than 16 kHz 0: the tristate initial pulses are not removed Description Fault user-defined bypass mode 1: the fault internal management is disabled 0: the fault internal management is enabled DocID022647 Rev 5 STA321MP Startup/shutdown pop noise removal Bit RW RST Name Description 2 RW 1 SID1 Serial interface (IS out) 1: SDO_56 is connected to the fault signal and SDO_78 outputs the tristate signal 0: IS out normal Bit RW RST Name Description RD Startup/shutdown pop noise disable 1: the startup/shutdown tristate sequence used to remove the pop noise is disabled 0: the startup/shutdown tristate signal sequence used to remove the pop noise is enabled. This feature is available only when PWMS output speed is set to 384 kHz. 3 RW 0 Bit RW RST Name 4 RW 0 RL0 5 RW 0 RL1 6 RW 0 RL2 7 RW 0 RL3 Description Set a tristate duration (same value for startup/shutdown pop noise removal) RL[3:0] 7.3 Tristate duration 0000 default duration equal to 116 ms 0001 default value x2 0010 default value x3 0011 default value x4 0100 default value x5 0101 default value x6 0110 default value x7 User-defined delay time (0x82) and (0x83) D7 D6 D5 D4 D3 D2 D1 D0 UDDT15 UDDT14 UDDT13 UDDT12 UDDT11 UDDT10 UDDT9 UDDT8 0 0 0 0 0 0 0 0 D7 D6 D5 D4 D3 D2 D1 D0 UDDT7 UDDT6 UDDT5 UDDT4 UDDT3 UDDT2 UDDT1 UDDT0 1 1 1 1 1 1 1 1 DocID022647 Rev 5 79/84 Package information 8 STA321MP Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) packages, depending on their level of environmental compliance. ECOPACK(R) specifications, grade definitions and product status are available at: www.st.com. ECOPACK(R) is an ST trademark. Figure 12. TQFP64 (10 x 10 mm) package dimensions mm inch DIM. MIN. TYP. MAX. A MIN. TYP. 1.60 A1 0.05 0.15 0.063 0.002 0.006 A2 1.35 1.40 1.45 0.053 B 0.17 0.22 0.27 0.0066 0.0086 0.0106 0.055 0.057 C 0.09 D 11.80 12.00 12.20 0.464 0.472 0.480 D1 9.80 10.00 10.20 0.386 0.394 0.401 0.0035 D3 7.50 0.295 e 0.50 0.0197 E 11.80 12.00 12.20 0.464 0.472 0.480 E1 9.80 10.00 10.20 0.386 0.394 0.401 0.45 0.60 0.75 0.0177 0.0236 0.0295 E3 7.50 L OUTLINE AND MECHANICAL DATA MAX. 0.295 L1 1.00 K 0 (min.), 3.5 (min.), 7(max.) 0.0393 ccc 0.080 TQFP64 (10 x 10 x 1.4mm) 0.0031 D D1 A D3 A2 A1 48 33 49 32 0.08mm ccc E E1 E3 B B Seating Plane 17 64 1 16 C L L1 e K TQFP64 0051434 E 80/84 DocID022647 Rev 5 STA321MP Package information Table 20. VFQFPN56 (8 x 8 mm) package dimensions mm Reference Min. Typ. Max. A 0.80 0.90 1.00 A1 0 0.05 D 8.00 D2 See exposed pad variations E 8.00 E2 See exposed pad variations b b1 e (pad pitch) 0.25 0.30 0.35 0.20 0.25 0.30 (1) L1 0.05 0.15 aaa 0.15 bbb 0.10 ddd 0.05 eee 0.08 fff 0.10 ccc 0.10 1. Refer to Figure 13. Table 21. Exposed pad variations D2 E2 Variation Min. Typ. Max Min. Typ. Max. A 5.85 5.90 5.95 5.85 5.90 5.95 B 4.25 4.30 4.35 4.25 4.30 4.35 DocID022647 Rev 5 81/84 Package information STA321MP Figure 13. VFQFPN56 (8 x 8 mm) package outline The axis of each pad must lie simultaneously in both tolerance zones. (4) - The terminal A1 corner must be identified on the top surface through inked or lasered mark dot. A distinguishing feature is allowable on the bottom surface of the package, chamfer at die paddle corner to identify the terminal A1. Exact shape of each corner is optional. (5) - All dimensions are in mm. 826820 82/84 DocID022647 Rev 5 STA321MP 9 Revision history Revision history Table 22. Document revision history Date Revision Changes 07-Feb-2012 1 Initial release 20-Dec-2012 2 Updated pins 17, 21, and 22 in Figure 3: Pin connections STA321MPL - TQFP64 (top view) and Table 2: Pin description STA321MPL (TQFP64) 05-Mar-2013 3 Updated Description Updated Table 1: Device summary Updated Section 1.2: Pin description, Table 2, 3 Updated Table 4, 5, 6, 7 Removed section "Pin description" Added Section 3: Microphone interface, Figure 5, 6, and Table 9 Added Section 4.4: Read operation Removed "Application reference schematics" section Updated Section 5: Registers, Section 5.1, Table 10: Register summary, Section 5.2, added Figure 9 Added Section 5.2.3: Configuration register D (0x03) Added Section 5.2.27: Fine volume (FineVol) (0x5B) Added Section 5.2.32 through Section 5.2.36 Added Section 5.2.42 through Section 5.2.48 Renamed Section 6 and added Section 6.4 and 6.5 Added Section 7: Startup/shutdown pop noise removal 02-May-2013 4 Textual update in Section 3.6: Normal channel attenuation and Interpolation ratio select 03-Sep-2013 5 Added sentence "If XTI input is not used, related pin must be tied to GND" Chapter 5.2.1: Configuration register A (0x00) on page 27. 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