PCF8566 Universal LCD driver for low multiplex rates Rev. 07 -- 25 February 2009 Product data sheet 1. General description The PCF8566 is a peripheral device which interfaces to almost any Liquid Crystal Display (LCD) with low multiplex rates. It generates the drive signals for any static or multiplexed LCD containing up to four backplanes and up to 24 segments and can easily be cascaded for larger LCD applications. The PCF8566 is compatible with most microprocessors or microcontrollers and communicates via a two-line bidirectional I2C-bus. Communication overheads are minimized by a display RAM with auto-incremented addressing, by hardware subaddressing and by display memory switching (static and duplex drive modes). 2. Features n Single-chip LCD controller/driver n 24 segment drives: u Up to twelve 7-segment numeric characters including decimal pointer u Up to six 14-segment alphanumeric characters u Any graphics of up to 96 elements n Versatile blinking modes n No external components required (even in multiple device applications) n Selectable backplane drive configuration: static or 2, 3, 4 backplane multiplexing n Selectable display bias configuration: static, 12 or 13 n Internal LCD bias generation with voltage-follower buffers n 24 x 4-bit RAM for display data storage n Auto-incremented display data loading across device subaddress boundaries n Display memory bank switching in static and duplex drive modes n LCD and logic supplies may be separated n 2.5 V to 6 V power supply range n Low power consumption n Power-saving mode for extremely low power consumption in battery-operated and telephone applications n I2C-bus interface n TTL and CMOS compatible n Compatible with any 4, 8 or 16-bit microprocessor or microcontroller n May be cascaded for large LCD applications (up to 1536 segments possible) n Cascadable with 40-segment LCD driver PCF8576C n Optimized pinning for plane wiring in both and multiple PCF8566 applications n Space-saving 40-lead plastic very small outline package (VSO40; SOT158-1) n Manufactured in silicon gate CMOS process PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 3. Ordering information Table 1. Ordering information Type number Package Name Description Version PCF8566P DIP40 plastic dual in-line package; 40 leads (600 mil) SOT129-1 PCF8566T VSO40 plastic very small outline package; 40 leads SOT158-1 PCF8566TS[1] VSO40 plastic very small outline package; 40 leads SOT158-1 PCF8566U[2] PCF8566U wire bond die; 40 bonding pads; 2.5 x 2.91 x 0.381 mm PCF8566U [1] Dark-green version. [2] Chip in tray for chip on board. 4. Marking Table 2. Marking codes Type number Marking code PCF8566P PCF8566P PCF8566T PCF8566T PCF8566TS PCF8566TS PCF8566U PC8566-1 PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 2 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 5. Block diagram BP0 BP2 BP1 BP3 13 VDD 5 14 15 S0 to S23 16 BACKPLANE OUTPUTS 17 to 40 DISPLAY SEGMENT OUTPUTS R LCD VOLTAGE SELECTOR R R VLCD CLK SYNC 12 LCD BIAS GENERATOR SHIFT REGISTER PCF8566 4 3 DISPLAY LATCH TIMING INPUT BANK SELECTOR BLINKER DISPLAY RAM 24 x 4 BITS OUTPUT BANK SELECTOR DISPLAY CONTROLLER OSC VSS SCL SDA 6 OSCILLATOR POWERON RESET DATA POINTER COMMAND DECODER 11 2 1 INPUT FILTERS SUBADDRESS COUNTER I2C-BUS CONTROLLER 10 7 SA0 A0 8 A1 9 A2 mgg383 Fig 1. Block diagram of PCF8566 PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 3 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 6. Pinning information 6.1 Pinning SDA 1 40 S23 SCL 2 39 S22 SYNC 3 38 S21 CLK 4 37 S20 VDD 5 36 S19 OSC 6 35 S18 A0 7 34 S17 A1 8 33 S16 A2 9 32 S15 SA0 10 VSS 11 PCF8566 31 S14 30 S13 VLCD 12 29 S12 BP0 13 28 S11 BP2 14 27 S10 BP1 15 26 S9 BP3 16 25 S8 S0 17 24 S7 S1 18 23 S6 S2 19 22 S5 S3 20 21 S4 001aai338 Fig 2. Pin configuration for PCF8566 PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 4 of 48 PCF8566 NXP Semiconductors S8 S7 S6 S5 S4 S3 S2 S1 S0 BP3 Universal LCD driver for low multiplex rates 25 24 23 22 21 20 19 18 17 16 15 BP1 S9 26 14 BP2 S10 27 13 BP0 S11 28 12 VLCD S12 29 S13 30 11 VSS S14 31 10 SA0 S15 32 9 A2 S16 33 8 A1 S17 34 7 A0 S18 35 6 OSC 36 37 38 39 40 1 2 3 4 5 S19 S20 S21 S22 S23 SDA SCL SYNC CLK VDD PCF8566U mbh783 Fig 3. Pin configuration for PCF8566U 6.2 Pin description Table 3. Pin description Symbol Pin Description SDA 1 I2C-bus data input and output SCL 2 I2C-bus clock input and output SYNC 3 cascade synchronization input and output CLK 4 external clock input and output VDD 5 positive supply voltage[1] OSC 6 oscillator select A0 7 I2C-bus subaddress inputs A1 8 A2 9 SA0 10 I2C-bus slave address bit 0 input VSS 11 logic ground VLCD 12 LCD supply voltage PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 5 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates Table 3. Pin description ...continued Symbol Pin Description BP0 13 LCD backplane outputs BP2 14 BP1 15 BP3 16 S0 to S23 17 to 40 [1] LCD segment outputs The substrate (rear side of the die) is wired to VDD but should not be electrically connected. 7. Functional description The PCF8566 is a versatile peripheral device designed to interface any microprocessor or microcontroller to a wide variety of LCDs. It can directly drive any static or multiplexed LCD containing up to 4 backplanes and up to 24 segments. The display configurations possible with the PCF8566 depend on the number of active backplane outputs required. Display configuration selection is shown in Table 4. All of the display configurations given in Table 4 can be implemented in the typical system shown in Figure 4. The host microprocessor or microcontroller maintains the 2-line I2C-bus communication channel with the PCF8566. Biasing voltages for the multiplexed LCD waveforms are generated internally, removing the need for an external bias generator. The internal oscillator is selected by connecting pin OSC to VSS. The only other connections required to complete the system are the power supplies (pins VDD, VSS and VLCD) and the LCD panel selected for the application. Table 4. Display configurations Backplanes Elements 7-segment numeric 14-segment numeric Digits Indicator symbols Characters Indicator symbols 4 96 12 12 6 12 96 (4 x 24) 3 72 9 9 4 16 72 (3 x 24) 2 48 6 6 3 6 48 (2 x 24) 1 24 3 3 1 10 24 PCF8566_7 Product data sheet Dot matrix (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 6 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates VDD R trise 2 Cbus HOST MICROPROCESSOR/ MICROCONTROLLER VDD SDA SCL OSC VLCD 5 12 1 17 to 40 24 segment drives PCF8566 2 6 13 to 16 7 A0 8 A1 9 A2 10 4 backplanes LCD PANEL (up to 96 elements) 11 SA0 VSS mgg385 VSS Fig 4. Typical system configuration 7.1 Power-on reset At power-on the PCF8566 resets to the following starting conditions: * * * * * * * All backplane outputs are set to VDD All segment outputs are set to VDD Drive mode 1:4 multiplex with 13 bias is selected Blinking is switched off Input and output bank selectors are reset (as defined in Table 8) The I2C-bus interface is initialized The data pointer and the subaddress counter are cleared Do not transfer data on the I2C-bus after a power-on for at least 1 ms to allow the reset action to complete. 7.2 LCD bias generator The full-scale LCD voltage (Voper) is obtained from VDD - VLCD. The LCD voltage may be temperature compensated externally through the VLCD supply to pin 12. Fractional LCD biasing voltages are obtained from an internal voltage divider comprising three series resistors connected between VDD and VLCD. The center resistor can be switched out of the circuit to provide a 12 bias voltage level for the 1:2 multiplex configuration. 7.3 LCD voltage selector The LCD voltage selector coordinates the multiplexing of the LCD in accordance with the selected LCD drive configuration. The operation of the voltage selector is controlled by mode-set commands from the command decoder. The biasing configurations that apply to the preferred modes of operation, together with the biasing characteristics as functions of VLCD and the resulting discrimination ratios (D), are given in Table 5. PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 7 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates Table 5. Preferred LCD drive modes: summary of characteristics LCD drive mode Number of: Backplanes Bias levels LCD bias configuration static 1 2 static 0 1 1:2 multiplex 2 3 1 2 0.354 0.791 2.236 4 1 3 0.333 0.745 2.236 4 1 3 0.333 0.638 1.915 4 1 3 0.333 0.577 1.732 1:2 multiplex 1:3 multiplex 1:4 multiplex 2 3 4 V off ( RMS ) -------------------------V LCD V on ( RMS ) ------------------------V LCD V on ( RMS ) D = -------------------------V off ( RMS ) A practical value for VLCD is determined by equating Voff(RMS) with a defined LCD threshold voltage (Vth), typically when the LCD exhibits approximately 10 % contrast. In the static drive mode a suitable choice is VLCD > 3Vth. Multiplex drive modes of 1:3 and 1:4 with 12 bias are possible but the discrimination and hence the contrast ratios are smaller. 1 Bias is calculated by ------------- , where the values for a are 1+a a = 1 for 12 bias a = 2 for 13 bias The RMS on-state voltage (Von(RMS)) for the LCD is calculated with the equation V on ( RMS ) = V LCD 2 1 1 --- + ( n - 1 ) x ------------- 1 + a n -----------------------------------------------------------n (1) where VLCD is the resultant voltage at the LCD segment and where the values for n are n = 1 for static mode n = 2 for 1:2 multiplex n = 3 for 1:3 multiplex n = 4 for 1:4 multiplex The RMS off-state voltage (Voff(RMS)) for the LCD is calculated with the equation: 2 V off ( RMS ) = V LCD a - ( 2a + n ) -------------------------------2 n x (1 + a) (2) Discrimination is the ratio of Von(RMS) to Voff(RMS) and is determined from the equation: V on ( RMS ) ------------------------ = V off ( RMS ) 2 (a + 1) + (n - 1) ------------------------------------------2 (a - 1) + (n - 1) (3) Using Equation 3, the discrimination for an LCD drive mode of * 1:3 multiplex with 12 bias is 3 = 1.732 PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 8 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 21 3 * 1:4 multiplex with 12 bias is ---------- = 1.528 The advantage of these LCD drive modes is a reduction of the LCD full scale voltage VLCD as follows: * 1:3 multiplex (12 bias): V LCD = 6 x V off ( RMS ) = 2.449V off ( RMS ) 4 x 3) * 1:4 multiplex (12 bias): V LCD = (--------------------- = 2.309V off ( RMS ) 3 These compare with V LCD = 3V off ( RMS ) when 13 bias is used. It should be noted that VLCD is sometimes referred as the LCD operating voltage. PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 9 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 7.4 LCD drive mode waveforms 7.4.1 Static drive mode The static LCD drive mode is used when a single backplane is provided in the LCD. Backplane and segment drive waveforms for this mode are shown in Figure 5. Tfr LCD segments VLCD BP0 VSS state 1 (on) VLCD state 2 (off) Sn VSS VLCD Sn+1 VSS (a) Waveforms at driver. VLCD state 1 0V -VLCD VLCD state 2 0V -VLCD (b) Resultant waveforms at LCD segment. mgl745 Vstate1(t) = VSn(t) - VBP0(t). Von(RMS) = VLCD. Vstate2(t) = VSn+1(t) - VBP0(t). Voff(RMS) = 0 V. Fig 5. Static drive mode waveforms PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 10 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 7.4.2 1:2 Multiplex drive mode When two backplanes are provided in the LCD, the 1:2 multiplex mode applies. The PCF8566 allows the use of 12 bias or 13 bias (see Figure 6 and Figure 7). Tfr VLCD BP0 LCD segments VLCD / 2 VSS state 1 VLCD BP1 state 2 VLCD / 2 VSS VLCD Sn VSS VLCD Sn+1 VSS (a) Waveforms at driver. VLCD VLCD / 2 state 1 0V -VLCD / 2 -VLCD VLCD VLCD / 2 state 2 0V -VLCD / 2 -VLCD (b) Resultant waveforms at LCD segment. mgl746 Vstate1(t) = VSn(t) - VBP0(t). Von(RMS) = 0.791VLCD. Vstate2(t) = VSn(t) - VBP1(t). Voff(RMS) = 0.354VLCD Fig 6. Waveforms for the 1:2 multiplex drive mode with 12 bias PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 11 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates Tfr VLCD BP0 LCD segments 2VLCD / 3 VLCD / 3 VSS state 1 VLCD BP1 state 2 2VLCD / 3 VLCD / 3 VSS VLCD Sn Sn+1 2VLCD / 3 VLCD / 3 VSS VLCD 2VLCD / 3 VLCD / 3 VSS (a) Waveforms at driver. VLCD 2VLCD / 3 VLCD / 3 state 1 0V -VLCD / 3 -2VLCD / 3 -VLCD VLCD 2VLCD / 3 VLCD / 3 state 2 0V -VLCD / 3 -2VLCD / 3 -VLCD (b) Resultant waveforms at LCD segment. mgl747 Vstate1(t) = VSn(t) - VBP0(t). Von(RMS) = 0.745VLCD Vstate2(t) = VSn(t) - VBP1(t) Voff(RMS) = 0.333VLCD. Fig 7. Waveforms for the 1:2 multiplex drive mode with 13 bias PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 12 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 7.4.3 1:3 Multiplex drive mode When three backplanes are provided in the LCD, the 1:3 multiplex drive mode applies as shown in Figure 8. Tfr VLCD BP0 BP1 LCD segments 2VLCD / 3 VLCD / 3 VSS state 1 VLCD 2VLCD / 3 state 2 VLCD / 3 VSS VLCD BP2 2VLCD / 3 VLCD / 3 VSS VLCD Sn Sn+1 Sn+2 2VLCD / 3 VLCD / 3 VSS VLCD 2VLCD / 3 VLCD / 3 VSS VLCD 2VLCD / 3 VLCD / 3 VSS (a) Waveforms at driver. VLCD 2VLCD / 3 VLCD / 3 state 1 0V -VLCD / 3 -2VLCD / 3 -VLCD VLCD 2VLCD / 3 VLCD / 3 state 2 0V -VLCD / 3 -2VLCD / 3 -VLCD (b) Resultant waveforms at LCD segment. mgl748 Vstate1(t) = VSn(t) - VBP0(t). Von(RMS) = 0.638VLCD. Vstate2(t) = VSn(t) - VBP1(t). Voff(RMS) = 0.333VLCD. Fig 8. Waveforms for the 1:3 multiplex drive mode with 13 bias PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 13 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 7.4.4 1:4 multiplex drive mode When four backplanes are provided in the LCD, the 1:4 multiplex drive mode applies, as shown in Figure 9. Tfr VLCD BP0 LCD segments 2VLCD / 3 VLCD / 3 VSS state 1 VLCD BP1 state 2 2VLCD / 3 VLCD / 3 VSS VLCD BP2 BP3 2VLCD / 3 VLCD / 3 VSS VLCD 2VLCD / 3 VLCD / 3 VSS VLCD Sn 2VLCD / 3 VLCD / 3 VSS VLCD Sn+1 2VLCD / 3 VLCD / 3 VSS VLCD Sn+2 2VLCD / 3 VLCD / 3 VSS VLCD Sn+3 2VLCD / 3 VLCD / 3 VSS (a) Waveforms at driver. VLCD 2VLCD / 3 VLCD / 3 state 1 0V -VLCD / 3 -2VLCD / 3 -VLCD VLCD 2VLCD / 3 VLCD / 3 state 2 0V -VLCD / 3 -2VLCD / 3 -VLCD (b) Resultant waveforms at LCD segment. mgl749 Vstate1(t) = VSn(t) - VBP0(t). Von(RMS) = 0.577VLCD. Vstate2(t) = VSn(t) - VBP1(t). Voff(RMS) = 0.333VLCD. Fig 9. Waveforms for the 1:4 multiplex mode with 13 bias PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 14 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 7.5 Oscillator The internal logic and the LCD drive signals of the PCF8566 are timed by the frequency fclk, which equals either the built-in oscillator frequency fosc or the external clock frequency fclk(ext). The clock frequency (fclk) determines the LCD frame frequency (ffr) and the maximum rate for data reception from the I2C-bus. To allow I2C-bus transmissions at their maximum data rate of 100 kHz, fclk should be chosen to be above 125 kHz. 7.5.1 Internal clock The internal oscillator is enabled by connecting pin OSC to pin VSS. In this case, the output from pin CLK is the clock signal for any cascaded PCF8566s or PCF8576s in the system. 7.5.2 External clock Connecting pin OSC to VDD enables an external clock source. Pin CLK then becomes the external clock input. Remark: A clock signal must always be supplied to the device. Removing the clock, freezes the LCD in a DC state. 7.6 Timing The timing of the PCF8566 sequences the internal data flow of the device. This includes the transfer of display data from the display RAM to the display segment outputs. In cascaded applications, the synchronization signal (SYNC) maintains the correct timing relationship between the PCF8566s in the system. The timing also generates the LCD frame frequency which is derived as an integer division of the clock frequency (see Table 6). The frame frequency is set by the mode set commands when an internal clock is used or by the frequency applied to the pin CLK when an external clock is used. Table 6. LCD frame frequencies [1] PCF8566 mode Frame frequency Nominal frame frequency (Hz) normal mode f clk f fr = -----------2880 69 [2] power saving mode f clk f fr = --------480 65 [3] [1] The possible values for fclk see Table 20. [2] For fclk = 200 kHz. [3] For fclk = 31 kHz. The ratio between the clock frequency and the LCD frame frequency depends on the mode in which the device is operating. In the power-saving mode the reduction ratio is six times smaller; this allows the clock frequency to be reduced by a factor of six. The reduced clock frequency results in a significant reduction in power dissipation. PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 15 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates The lower clock frequency has the disadvantage of increasing the response time when large amounts of display data are transmitted on the I2C-bus. When a device is unable to process a display data byte before the next one arrives, it holds the SCL line LOW until the first display data byte is stored. This slows down the transmission rate of the I2C-bus but no data loss occurs. 7.7 Display register The display register holds the display data while the corresponding multiplex signals are generated. There is a one-to-one relationship between the data in the display register, the LCD segment outputs and one column of the display RAM. 7.8 Shift register The shift register transfers display information from the display RAM to the display register while previous data is displayed. 7.9 Segment outputs The LCD drive section includes 24 segment outputs S0 to S23 which must be connected directly to the LCD. The segment output signals are generated based on the multiplexed backplane signals and with data resident in the display register. When less than 24 segment outputs are required, the unused segment outputs should be left open-circuit. 7.10 Backplane outputs The LCD drive section includes four backplane outputs: BP0 to BP3. The backplane output signals are generated based on the selected LCD drive mode. * In 1:4 multiplex drive mode: BP0 to BP3 must be connected directly to the LCD. If less than four backplane outputs are required the unused outputs can be left as an open-circuit. * In 1:3 multiplex drive mode: BP3 carries the same signal as BP1, therefore these two adjacent outputs can be tied together to give enhanced drive capabilities. * In 1:2 multiplex drive mode: BP0 and BP2, BP1 and BP3 respectively carry the same signals and can also be paired to increase the drive capabilities. * In static drive mode: the same signal is carried by all four backplane outputs and they can be connected in parallel for very high drive requirements. 7.11 Display RAM The display RAM is a static 24 x 4-bit RAM which stores LCD data. Logic 1 in the RAM bit map indicates the on-state of the corresponding LCD segment; similarly, logic 0 indicates the off-state. There is a direct relationship between the RAM addresses and the segment outputs, and between the individual bits of a RAM word and the backplane outputs. The first RAM row corresponds to the 24 segments operated with respect to backplane BP0 (see Figure 10). In multiplexed LCD applications, the segment data of rows 1 to 4 of the display RAM are time-multiplexed with BP0, BP1, BP2 and BP3 respectively. PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 16 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates display RAM addresses (columns)/segment outputs (S) 0 1 2 3 4 19 20 21 22 23 0 display RAM bits 1 (rows)/ backplane outputs 2 (BP) 3 mgg389 Fig 10. Display RAM bit map showing the direct relationship between display RAM addresses and segment outputs and between bits in a RAM word and backplane outputs When display data is transmitted to the PCF8566 the display bytes received are stored in the display RAM based on the selected LCD drive mode. An example of a 7-segment numeric display illustrating the storage order for all drive modes is shown in Figure 11. The RAM storage organization applies equally to other LCD types. The following applies to Figure 11: * Static drive mode: the eight transmitted data bits are placed in row 0 to eight successive display RAM addresses. * 1:2 multiplex drive mode: the eight transmitted data bits are placed in row 0 and 1 to four successive display RAM addresses. * 1:3 multiplex drive mode: the eight transmitted data bits are placed in row 0, 1 and 2 of three successive addresses, with bit 2 of the third address left unchanged. This last bit can, if necessary, be controlled by an additional transfer to this address but avoid overriding adjacent data because always full bytes are transmitted. * 1:4 multiplex drive mode: the eight transmitted data bits are placed in row 0, 1, 2 and 3 to two successive display RAM addresses. 7.12 Data pointer The addressing mechanism for the display RAM is realized using the data pointer. This allows the loading of an individual display data byte or a series of display data bytes, into any location of the display RAM. The sequence commences with the initialization of the data pointer by the load data pointer command (see Table 13). After this, the data byte is stored starting at the display RAM address indicated by the data pointer (see Figure 11). Once each byte is stored, the data pointer is automatically incremented based on the selected LCD configuration. The contents of the data pointer are incremented as follows: * * * * In static drive mode by eight. In 1:2 multiplex drive mode by four. In 1:3 multiplex drive mode by three. In 1:4 multiplex drive mode by two. If an I2C-bus data access terminates early, the state of the data pointer is unknown. Consequently, the data pointer must be rewritten prior to further RAM accesses. PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 17 of 48 xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx LCD segments g Sn+7 c Sn+1 DP BP1 e Sn+1 DP b f e BP1 c Sn BP2 DP b n 6 n 7 c x x x b x x x a x x x f x x x g x x x e x x x d x x x DP x x x n n 1 n 2 n 3 a b x x f g x x e c x x d DP x x n n 1 n 2 b DP c x a d g x f e x x n n 1 a c b DP f e g d LSB c b a f g e d DP e BP0 bit/ BP BP1 c d MSB a b f LSB g e c d DP 0 1 2 3 MSB LSB b DP c a d g f e BP2 g Sn+1 0 1 2 3 a f multiplex n 5 Sn bit/ BP d 1:4 n 4 BP0 a g multiplex bit/ BP c d Sn+2 n 3 b f Sn+3 1:3 n 2 BP3 0 1 2 3 MSB a c b DP f LSB e g d DP x = data bit unchanged Fig 11. Relationship between LCD layout, drive mode, display RAM filling order and display data transmitted over the I2C-bus PCF8566 18 of 48 (c) NXP B.V. 2009. All rights reserved. mgl751 Universal LCD driver for low multiplex rates Rev. 07 -- 25 February 2009 Sn+2 0 1 2 3 a g multiplex n 1 BP0 Sn 1:2 n MSB bit/ BP Sn d Sn+6 transmitted display byte Sn+1 e Sn+5 BP0 b f Sn+4 static display RAM filling order a Sn+2 Sn+3 LCD backplanes NXP Semiconductors PCF8566_7 Product data sheet drive mode PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 7.13 Sub-address counter The storage of display data is conditioned by the contents of the subaddress counter. Storage is allowed to take place only when the contents of the subaddress counter match with the hardware subaddress applied to A0, A1 and A2. The subaddress counter value is defined by the device select command (see Table 14 and Table 21). If the contents of the subaddress counter and the hardware subaddress do not match then data storage is blocked but the data pointer will be incremented as if data storage had taken place. The subaddress counter is also incremented when the data pointer overflows. The storage arrangements described lead to extremely efficient data loading in cascaded applications. When a series of display bytes are sent to the display RAM, automatic wrap-over to the next PCF8566 occurs when the last RAM address is exceeded. Subaddressing across device boundaries is successful even if the change to the next device in the cascade occurs within a transmitted character (such as during the 14th display data byte transmitted in 1:3 multiplex mode). 7.14 Output bank selector The output bank selector (see Table 15), selects one of the four bits per display RAM address for transfer to the display register. The actual bit selected depends on the LCD drive mode in operation and on the instant in the multiplex sequence. * In 1:4 multiplex mode: all RAM addresses of bit 0 are selected, followed sequentially by the contents of bit 1, bit 2 and then bit 3. * In 1:3 multiplex mode: bits 0, 1 and 2 are selected sequentially. * In 1:2 multiplex mode: bits 0 and 1 are selected. * In the static mode: bit 0 is selected. The PCF8566 includes a RAM bank switching feature in the static and 1:2 multiplex drive modes. In the static drive mode, the bank select command may request the contents of bit 2 to be selected for display instead of the contents of bit 0. In 1:2 multiplex drive mode, the contents of bits 2 and 3 may be selected instead of bits 0 and 1. This enables preparation of display information in an alternative bank and the ability to switch to it once it has been assembled. 7.15 Input bank selector The input bank selector loads display data into the display RAM based on the selected LCD drive configuration. Using the bank select command, display data can be loaded in bit 2 into static drive mode or in bits 2 and 3 into 1:2 multiplex drive mode. The input bank selector functions independently of the output bank selector. 7.16 Blinker The display blinking capabilities of the PCF8566 are very versatile. The whole display can be blinked at frequencies selected by the blink command. The blinking frequencies are integer fractions of the clock frequency; the ratios between the clock and blinking frequencies depend on the mode in which the device is operating (see Table 7). PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 19 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates Table 7. Blink frequencies Blinking mode Normal operating mode ratio Power saving mode ratio Blink frequency off - - blinking off 1 f clk f blink = --------------92160 f elk f blink = --------------15360 2 Hz 2 f clk f blink = ------------------184320 f clk f blink = --------------30720 1 Hz 3 f clk f blink = ------------------368640 f clk f blink = --------------61440 0.5 Hz An additional feature is for an arbitrary selection of LCD segments to be blinked. This applies to the static and 1:2 multiplex drive modes and can be implemented without any communication overheads. Using the output bank selector, the displayed RAM banks are exchanged with alternate RAM banks at the blinking frequency. This mode can also be specified by the blink select command. In the 1:3 and 1:4 multiplex modes, where no alternate RAM bank is available, groups of LCD segments can be blinked by selectively changing the display RAM data at fixed time intervals. If the entire display needs to be blinked at a frequency other than the nominal blinking frequency, this can be done using the mode set command to set and reset the display enable bit E at the required rate (see Table 9). 8. Basic architecture 8.1 Characteristics of the I2C-bus The I2C-bus provides bidirectional, two-line communication between different IC or modules. The two lines are a Serial Data line (SDA) and a Serial Clock Line (SCL). When connected to the output stages of a device, both lines must be connected to a positive supply via a pull-up resistor. Data transfer is initiated only when the bus is not busy. 8.1.1 Bit transfer One data bit is transferred during each clock pulse. The data on the SDA line must remain stable during the HIGH period of the clock pulse. Changes in the data line at this time will be interpreted as a control signal. Bit transfer is illustrated in Figure 12. SDA SCL data line stable; data valid change of data allowed mba607 Fig 12. Bit transfer PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 20 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 8.1.1.1 START and STOP conditions Both data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW change of the data line, while the clock is HIGH, is defined as the START condition (S). A LOW-to-HIGH change of the data line, while the clock is HIGH, is defined as the STOP condition (P). The START and STOP conditions are illustrated in Figure 13. SDA SDA SCL SCL S P START condition STOP condition mbc622 Fig 13. Definition of START and STOP conditions 8.1.2 System configuration A device generating a message is a transmitter and a device receiving a message is the receiver. The device that controls the message is the master and the devices which are controlled by the master are the slaves. The system configuration is illustrated in Figure 14. MASTER TRANSMITTER/ RECEIVER SLAVE RECEIVER SLAVE TRANSMITTER/ RECEIVER MASTER TRANSMITTER MASTER TRANSMITTER/ RECEIVER SDA SCL mga807 Fig 14. System configuration 8.1.3 Acknowledge The number of data bytes transferred between the START and STOP conditions from transmitter to receiver is unlimited. Each byte of eight bits is followed by an acknowledge bit. The acknowledge bit is a HIGH level signal put on the bus by the transmitter during which time the master generates an extra acknowledge related clock pulse. (See Figure 15). Acknowledgement on the I2C-bus is illustrated in * A slave receiver which is addressed must generate an acknowledge after the reception of each byte. * A master receiver must generate an acknowledge after the reception of each byte that has been clocked out of the slave transmitter. * The device that acknowledges must pull-down the SDA line during the acknowledge clock pulse, so that the SDA line is stable LOW during the HIGH period of the acknowledge related clock pulse (set-up and hold times must be taken into consideration). PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 21 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates * A master receiver must signal an end-of-data to the transmitter by not generating an acknowledge on the last byte that has been clocked out of the slave. In this event, the master receiver must leave the data line HIGH during the 9th pulse to not acknowledge. The master will now generate a STOP condition. data output by transmitter not acknowledge data output by receiver acknowledge SCL from master 1 2 8 9 S START condition clock pulse for acknowledgement mbc602 Fig 15. Acknowledgement on the I2C-bus 8.1.4 PCF8566 I2C-bus controller The PCF8566 acts as an I2C-bus slave receiver. It does not initiate I2C-bus transfers or transmit data to an I2C-bus master receiver. The only data output from the PCF8566 are the acknowledge signals of the selected devices. Device selection depends on the I2C-bus slave address, the transferred command data and the hardware subaddress. In single device application, the hardware subaddress inputs A0, A1 and A2 are normally tied to VSS which defines the hardware subaddress 0. In multiple device applications A0, A1 and A2 are tied to VSS or VDD using a binary coding scheme so that no two devices with a common I2C-bus slave address have the same hardware subaddress. In the power-saving mode it is possible that the PCF8566 is not able to keep up with the highest transmission rates when large amounts of display data are transmitted. If this situation occurs, the PCF8566 forces the SCL line LOW until its internal operations are completed. This is known as the clock synchronization feature of the I2C-bus and serves to slow down fast transmitters. Data loss does not occur. 8.1.5 Input filter To enhance noise immunity in electrically adverse environments, RC low-pass filters are provided on the SDA and SCL lines. 8.2 I2C-bus protocol Two I2C-bus 7 bit slave addresses (0111 110 and 0111 111) are reserved for the PCF8566. The least significant bit after the slave address is bit R/W. The PCF8566 is a write-only device. It will not respond to a read access, so this bit should always be logic 0. The second bit of the slave address is defined by the level tied at input SA0. PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 22 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates R/W slave address S 0 1 1 1 1 1 A 0 0 1 byte 001aai455 Fig 16. Slave address structure Two displays controlled by PCF8566 can be recognized on the same I2C-bus which allows: * Up to 16 PCF8566s on the same I2C-bus for very large LCD applications (see Section 13) * The use of two types of LCD multiplex on the same I2C-bus The I2C-bus protocol is shown in Figure 17. The sequence is initiated with a START condition (S) from the I2C-bus master which is followed by one of the PCF8566 slave addresses. All PCF8566s with the same SA0 level acknowledge in parallel to the slave address. All PCF8566s with the alternative SA0 level ignore the whole I2C-bus transfer. After acknowledgement, one or more command bytes (m) follow which define the status of the addressed PCF8566s. The last command byte is tagged with a cleared most significant bit, the continuation bit C. The command bytes are also acknowledged by all addressed PCF8566s on the bus. After the last command byte, a series of display data bytes (n) may follow. These display bytes are stored in the display RAM at the address specified by the data pointer and the subaddress counter. Both data pointer and subaddress counter are automatically updated and the data is directed to the intended PCF8566 device. The acknowledgement after each byte is made only by the (A0, A1 and A2) addressed PCF8566. After the last display byte, the I2C-bus master issues a STOP condition (P). R/W acknowledge by A0, A1 and A2 selected PCF8566 only acknowledge by all addressed PCF8566s slave address S S 0 1 1 1 1 1 A 0 A C 0 1 byte COMMAND m 1 byte(s) A DISPLAY DATA A P n > 0 byte(s) update data pointers and if necessary, subaddress counter mgg390 Fig 17. I2C-bus protocol PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 23 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 8.3 Command decoder The command decoder identifies command bytes that arrive on the I2C-bus. All available commands carry a continuation bit C in their most significant bit position as shown in Figure 18. When this bit is set, it indicates that the next byte of the transfer to arrive will also represent a command. If this bit is reset, it indicates that the command byte is the last in the transfer. Further bytes will be regarded as display data. The five commands available to the PCF8566 are defined in Table 8. MSB LSB C REST OF OPCODE msa833 (1) C = 0; last command. (2) C = 1; commands continue. Fig 18. General format of byte command Table 8. Definition of PCF8566 commands Command Opcode Reference Description Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Mode set C 1 0 LP E B M1 M0 Section 8.3.1 defines LCD drive mode, LCD bias configuration, display status and power dissipation mode Load data pointer C 0 0 P4 P3 P2 P1 P0 Section 8.3.2 data pointer to define one of 24 display RAM addresses Device select C 1 1 0 0 A2 A1 A0 Section 8.3.3 define one of eight hardware subaddresses Bank select C 1 1 1 1 0 I O Section 8.3.4 bit I: defines input bank selection (storage of arriving display data); bit O: defines output bank selection (retrieval of LCD display data) Blink C 1 1 1 0 A BF1 BF0 Section 8.3.5 defines the blink frequency and blink mode 8.3.1 Mode set command Table 9. LCD drive mode command bit description LCD drive mode Bit Drive mode Backplane M1 M0 static BP0 0 1 1:2 BP0, BP1 1 0 1:3 BP0, BP1. BP2 1 1 1:4 BP0, BP1. BP2, BP3 0 0 PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 24 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates Table 10. LCD bias configuration command bit description LCD bias Bit B 1 3 bias 0 1 2 bias 1 Table 11. Display status command bit description[1] Display status Bit E disabled (blank) 0 enabled 1 [1] The possibility to disable the display allows implementation of blinking under external control. Table 12. Power dissipation mode command bit description Display status Bit LP normal mode 0 power saving mode 1 8.3.2 Load data pointer command Table 13. Load data pointer command bit description Description Bit 5 bit binary value, 0 to 23 P4 P3 P2 P1 P0 8.3.3 Device select command Table 14. Device select command bit description Description Bit 3 bit binary value, 0 to 7 A2 A1 A0 8.3.4 Bank select command Table 15. Bank select command[1] Bank Mode Static 1:2 MUX RAM bit 0 RAM bits 0 and 1 RAM bit 2 RAM bits 2 and 3 RAM bit 0 RAM bits 0 and 1 RAM bit 2 RAM bits 2 and 3 Bit Value I 0 Input bank 1 Output bank [1] 0 1 The bank select command has no effect in 1:3 or 1:4 multiplex drive modes. PCF8566_7 Product data sheet O (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 25 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 8.3.5 Blink command Table 16. Blink frequency command bit description Blink frequency Bit BF1 BF0 off 0 0 1 0 1 2 1 0 3 1 1 Table 17. Blink mode command bit description Blink mode Bit A Normal blinking 0 Alternate RAM bank blinking 1 8.4 Display controller The display controller executes the commands identified by the command decoder. It contains the status registers of the PCF8566 and coordinates their effects. The controller also loads display data into the display RAM as required by the storage order. 9. Internal circuitry VLCD VSS SDA, SCL, SYNC, CLK, OSC, A0 to A2, SA0 VDD BP0 to BP3, S0 to S23 001aai456 Fig 19. Device protection diagram PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 26 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 10. Limiting values CAUTION Static voltages across the liquid crystal display can build up when the LCD supply voltage (VLCD) is on while the IC supply voltage (VDD) is off, or vice versa. This may cause unwanted display artifacts. To avoid such artifacts, VLCD and VDD must be applied or removed together. Table 18. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions VDD supply voltage VLCD LCD supply voltage VI input voltage on each of the pins SCL, SDA, A0 to A2, OSC, CLK, SYNC and SA0 VO output voltage on each of the pins S0 to S23 and BP0 to BP3 II Max Unit -0.5 7.0 V -0.5 7.0 V -0.5 7.0 V -0.5 7.0 V input current -20 +20 mA IO output current -25 +25 mA IDD supply current -50 +50 mA ISS ground supply current -50 +50 mA IDD(LCD) LCD supply current -50 +50 mA Ptot total power dissipation - 400 mW Po output power Tstg storage temperature Vesd electrostatic discharge voltage Ilu [1] [1] per package - 100 mW [2] -65 +150 C HBM [3] - 2000 V MM [4] - 200 V [5] - 100 mA latch-up current [1] Values with respect to VDD. [2] According to the NXP store and transport conditions (document SNW-SQ-623) the devices have to be stored at a temperature of +5 C to +45 C and a humidity of 25 % to 75 %. [3] Pass level; Human Body Model (HBM) according to JESD22-A114. [4] Pass level; Machine Model (MM), according to JESD22-A115. [5] Pass level; latch-up testing, according to JESD78. PCF8566_7 Product data sheet Min (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 27 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 11. Static characteristics Table 19. Static characteristics VSS = 0 V; VDD = 2.5 V to 6.0 V; VLCD = VDD - 2.5 V to VDD - 6.0 V; Tamb = -40 C to +85 C; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Supplies VDD supply voltage 2.5 - 6.0 V VLCD LCD supply voltage VDD - 6.0 - VDD - 2.5 V IDD supply current: IDD(lp) low-power mode supply current fclk = 200 kHz [1] - 30 90 A VDD = 3.5 V; VLCD = 0 V; fclk = 35 kHz; A0 to A2 tied to VSS [1] - 15 40 A Logic Vi input voltage VSS - 0.5 - VDD + 0.5 V VIL LOW-level input voltage VSS - 0.3VDD V VIH HIGH-level input voltage 0.7VDD - VDD V IOL LOW-level output current on pins CLK and SYNC; VOL = 1.0 V; VDD = 5.0 V -1 - - mA IL leakage current on pins SA0, CLK, OSC, A0 to A2; VI = VDD or VSS -1 - +1 A IOH(CLK) HIGH-level output current on pin CLK VOH = 4.0 V; VDD = 5.0 V - - +1 mA Ipd pull-down current on pins OSC and A0 to A2; VI = 1.0 V; VDD = 5.0 V 15 50 150 A RPU pull-up resistance on pin SYNC VPOR CI I2C-bus; 15 25 60 k power-on reset voltage [2] - 1.3 2 V input capacitance [3] - - 7 pF pins SDA and SCL Vi input voltage VSS - 0.5 - 6 V VIL LOW-level input voltage VSS - 0.3VDD V VIH HIGH-level input voltage 0.7VDD - 6 V IL leakage current VI = VDD or VSS -1 0 +1 A IOL LOW-level output current VOL = 0.4 V; VDD = 5.0 V -3 - - mA CI input capacitance - - 7 pF tw(spike) spike pulse width - - 100 ns [3] on bus PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 28 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates Table 19. Static characteristics ...continued VSS = 0 V; VDD = 2.5 V to 6.0 V; VLCD = VDD - 2.5 V to VDD - 6.0 V; Tamb = -40 C to +85 C; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit VBP voltage on pin BP BP0 to BP3; Cbpl = 35 nF - 20 - mV VS voltage on pin S S0 to S23; Csgm = 5 nF - 20 - mV Zo output impedance on pin BP0 to BP3; VLCD = VDD - 5 V [4] - 1 5 k on pin S0 to S23; VLCD = VDD - 5 V [4] - 3 7 k LCD outputs [1] Outputs open; inputs at VSS or VDD; external clock with 50 % duty factor; I2C-bus inactive. [2] Resets all logic when VDD < VPOR. [3] Periodically sampled, not 100 % tested. [4] Outputs measured one at a time. 11.1 Typical supply current characteristics mgg397 40 IDD (A) IDD (A) -40 C 30 mgg398 24 -40 C 16 +85 C +85 C 20 8 10 0 0 0 2 4 VLCD = 0 V; fclk(ext) = 200 kHz. Fig 20. Normal mode 6 VDD (V) 8 0 4 6 VDD (V) 8 VLCD = 0 V; fclk(ext) = 35 kHz. Fig 21. Low power mode PCF8566_7 Product data sheet 2 (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 29 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 11.2 Typical LCD output characteristics mgg399 6 RBP (k) mgg400 12 RS (k) 8 4 -40 C 4 2 +25 C +85 C 0 0 0 2 4 6 VDD (V) 8 VDD = 5 V; Tamb = -40 C to +85 C. 0 4 6 VDD (V) 8 VDD = 5 V. Fig 22. Backplane output impedance BP0 to BP3 (RBP) Fig 23. Segment output impedance S0 to S23 (RS) PCF8566_7 Product data sheet 2 (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 30 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 12. Dynamic characteristics Table 20. Dynamic characteristics VSS = 0 V; VDD = 2.5 V to 6.0 V; VLCD = VDD - 2.5 V to VDD - 6.0 V; Tamb = -40 C to +85 C; unless otherwise specified. [1] Symbol Parameter Conditions clock frequency normal mode; VDD = 5 V Min Typ Max Unit 125 200 315 kHz 21 31 48 kHz Clock fclk [2] power saving mode; VDD = 3.5 V tclk(H) HIGH-level clock time 1 - - s tclk(L) LOW-level clock time 1 - - s tPD(SYNC_N) SYNC propagation delay - - 400 ns tSYNC_NL SYNC LOW time 1 - - s tPD(drv) driver propagation delay - - 30 s with test loads; VLCD = VDD - 5 V I2C-bus tBUF bus free time between a STOP and START condition 4.7 - - s tHD;STA hold time (repeated) START condition 4.0 - - s tLOW low period of the SCL clock 4.7 - - s tHIGH high period of the SCL clock 4.0 - - s tSU;STA set-up time for a repeated START condition 4.7 - - s tHD;DAT data hold time 0 - - ns tSU;DAT data set-up time 250 - - ns tr rise time of both SDA and SCL signals - - 1.0 s tf fall time of both SDA and SCL signals - - 300 ns tSU;STO set-up time for STOP condition 4.7 - - s [1] All timing values referred to VIH and VIL levels with an input voltage swing of VSS to VDD. [2] At fclk < 125 kHz, I2C-bus maximum transmission speed is derated. PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 31 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 1 fclk tclk(H) tclk(L) 0.7VDD CLK 0.3VDD 0.7VDD SYNC 0.3VDD tPD(SYNC_N) tSYNC_NL 0.5 V BP0 to BP3 S0 to S23 (VDD = 5 V) 0.5 V tPD(drv) mgg391 Fig 24. Driver timing waveforms SDA tBUF tLOW tf SCL tHD;STA tr tHD;DAT tHIGH tSU;DAT SDA tSU;STA tSU;STO mga728 Fig 25. I2C-bus timing waveforms PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 32 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 13. Application information 13.1 Cascaded operation Large display configurations of up to sixteen PCF8566s can be recognized on the same I2C-bus by using the 3-bit hardware subaddress (A0, A1 and A2) and the programmable I2C-bus slave address (SA0). Table 21. Addressing cascaded PCF8566 Cluster Bit SA0 Pin A2 Pin A1 Pin A0 Device 1 0 0 0 0 0 0 0 1 1 0 1 0 2 0 1 1 3 1 0 0 4 1 0 1 5 1 1 0 6 1 1 1 7 0 0 0 8 0 0 1 9 0 1 0 10 0 1 1 11 1 0 0 12 1 0 1 13 1 1 0 14 1 1 1 15 2 1 Cascaded PCF8566s are synchronized. They can share the backplane signals from one of the devices in the cascade. Such an arrangement is cost-effective in large LCD applications since the backplane outputs of only one device need to be through-plated to the backplane electrodes of the display. The other PCF8566s of the cascade contribute additional segment outputs but their backplane outputs are left open-circuit (see Figure 26). PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 33 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates VLCD VDD 5 12 SDA 1 SCL 2 SYNC 17 to 40 24 segment drives LCD PANEL PCF8566 3 CLK 4 OSC 6 7 (up to 1536 elements) 13 to 16 8 A0 9 A1 10 A2 11 SA0 VSS BP0 to BP3 (open-circuit) VLCD VDD R trise 2 Cbus VDD VLCD 5 HOST MICROPROCESSOR/ MICROCONTROLLER SDA SCL SYNC CLK OSC 12 1 17 to 40 2 24 segment drives PCF8566 3 4 13 to 16 6 4 backplanes BP0 to BP3 7 A0 8 A1 9 A2 10 11 mgg384 SA0 VSS VSS Fig 26. Cascaded PCF8566 configuration The SYNC line is provided to maintain the correct synchronization between all cascaded PCF8566s. This synchronization is guaranteed after the power-on reset. The only time that SYNC is likely to be needed is if synchronization is accidentally lost (e.g. by noise in adverse electrical environments or by defining a multiplex mode when PCF8566s with differing SA0 levels are cascaded). SYNC is organized as an input/output pin; the output selection being realized as an open-drain driver with an internal pull-up resistor. A PCF8566 asserts the SYNC line at the onset of its last active backplane signal and monitors the SYNC line at all other times. If synchronization in the cascade is lost, it is restored by the first PCF8566 to assert SYNC. The timing relationship between the backplane waveforms and the SYNC signal for the various drive modes of the PCF8566 are shown in Figure 27. PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 34 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates Tfr = 1 ffr BP0 SYNC (a) static drive mode. BP0 (1/2 bias) BP0 (1/3 bias) SYNC (b) 1:2 multiplex drive mode. BP0 (1/3 bias) SYNC (c) 1:3 multiplex drive mode. BP0 (1/3 bias) SYNC (d) 1:4 multiplex drive mode. mgl755 Fig 27. Synchronization of the cascade for the various PCF8566 drive modes PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 35 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates Single plane wiring of packaged PCF8566s is illustrated in Figure 28. SDA SCL SYNC CLK VDD VSS VLCD SDA 1 40 S23 1 40 S47 SCL 2 39 S22 2 39 S46 SYNC 3 38 S21 3 38 S45 CLK 4 37 S20 4 37 S44 VDD 5 36 S19 5 36 S43 OSC 6 35 S18 6 35 S42 A0 7 34 S17 7 34 S41 A1 8 33 S16 8 33 S40 S39 A2 9 32 S15 9 32 SA0 10 31 S14 10 31 S38 VSS 11 30 S13 11 30 S37 VLCD 12 29 S12 12 29 S36 BP0 13 28 S11 BP0 13 28 S35 BP2 14 27 S10 BP2 14 27 S34 BP1 15 26 S9 BP1 15 26 S33 BP3 16 25 S8 BP3 16 25 S32 S0 17 24 S7 S24 17 24 S31 S1 18 23 S6 S25 18 23 S30 S2 19 22 S5 S26 19 22 S29 S3 20 21 S4 S27 20 21 S28 PCF8566 open-circuit S23 S0 S24 SEGMENTS BACKPLANES PCF8566 S47 mgg386 Fig 28. Single plane wiring of packaged PCF8566s PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 36 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 14. Package outline seating plane DIP40: plastic dual in-line package; 40 leads (600 mil) SOT129-1 ME D A2 L A A1 c e Z w M b1 (e 1) b MH 21 40 pin 1 index E 1 20 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 min. A2 max. b b1 c mm 4.7 0.51 4 1.70 1.14 0.53 0.38 0.36 0.23 52.5 51.5 inches 0.19 0.02 0.16 0.067 0.045 0.021 0.015 0.014 0.009 2.067 2.028 D e e1 L ME MH w Z (1) max. 14.1 13.7 2.54 15.24 3.60 3.05 15.80 15.24 17.42 15.90 0.254 2.25 0.56 0.54 0.1 0.6 0.14 0.12 0.62 0.60 0.69 0.63 0.01 0.089 (1) E (1) Note 1. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC JEITA SOT129-1 051G08 MO-015 SC-511-40 EUROPEAN PROJECTION ISSUE DATE 99-12-27 03-02-13 Fig 29. Package outline SOT129-1 (DIP40) PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 37 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates VSO40: plastic very small outline package; 40 leads SOT158-1 D E A X c y HE v M A Z 40 21 Q A2 A (A 3) A1 pin 1 index Lp L 1 detail X 20 w M bp e 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (2) e HE L Lp Q v w y Z (1) mm 2.7 0.3 0.1 2.45 2.25 0.25 0.42 0.30 0.22 0.14 15.6 15.2 7.6 7.5 0.762 12.3 11.8 2.25 1.7 1.5 1.15 1.05 0.2 0.1 0.1 0.6 0.3 0.012 0.096 0.004 0.089 0.01 0.017 0.0087 0.61 0.012 0.0055 0.60 0.30 0.29 0.03 0.48 0.46 0.089 0.067 0.059 inches 0.11 0.045 0.024 0.008 0.004 0.004 0.041 0.012 o 7 o 0 Notes 1. Plastic or metal protrusions of 0.4 mm (0.016 inch) maximum per side are not included. 2. Plastic interlead protrusions of 0.25 mm (0.01 inch) maximum per side are not included. OUTLINE VERSION REFERENCES IEC JEDEC JEITA EUROPEAN PROJECTION ISSUE DATE 95-01-24 03-02-19 SOT158-1 Fig 30. Package outline SOT158-1 (VSO40) PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 38 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 15. Bare die outline Wire bond die; 40 bonding pads; 2.5 x 2.91 x 0.381 mm PCF8566U D e A 24 23 22 21 PC8566-1 25 20 19 18 17 16 C1 15 e 26 14 F 27 13 28 12 29 x 30 0 11 0 31 y E 10 32 9 33 8 C2 34 7 35 6 P4 P3 P2 36 37 38 39 40 1 2 3 4 5 P1 X 0 0.5 detail X 1 mm scale DIMENSIONS (mm are the original dimensions) UNIT mm max nom min A D E e P1(1) P2(2) P3(1) P4(2) 0.406 0.381 0.356 2.5 2.91 0.548 0.200 0.018 0.12 0.106 0.12 0.106 Notes 1. Pad size 2. Passivation opening OUTLINE VERSION REFERENCES IEC JEDEC JEITA EUROPEAN PROJECTION ISSUE DATE 08-06-19 08-09-03 PCF8566U Fig 31. Bare die outline PCF8566U PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 39 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates Table 22. Bonding pad description All x/y coordinates represent the position of the center of each pad with respect to the center (x/y = 0) of the chip (see Figure 31). Symbol Pad X (m) Y (m) Description SDA 1 200 -1235 I2C-bus data input / output SCL 2 400 -1235 I2C-bus clock input / output SYNC 3 604 -1235 cascade synchronization input / output CLK 4 856 -1235 external clock input / output VDD 5 1062 -1235 supply voltage OSC 6 1080 -1235 oscillator select A0 7 1080 -825 I2C-bus subaddress input A1 8 1080 -625 A2 9 1080 -425 SA0 10 1080 -225 I2C-bus slave address bit 0 input VSS 11 1080 -25 logic ground VLCD 12 1080 347 LCD supply voltage BP0 13 1080 547 LCD backplane output BP2 14 1080 747 BP1 15 1080 947 BP3 16 1074 1235 S0 17 874 1235 S1 18 674 1235 S2 19 474 1235 S3 20 274 1235 S4 21 -274 1235 S5 22 -474 1235 S6 23 -674 1235 S7 24 -874 1235 S8 25 -1074 1235 S9 26 -1080 765 S10 27 -1080 565 S11 28 -1080 365 S12 29 -1080 165 S13 30 -1080 -35 S14 31 -1080 -235 S15 32 -1080 -435 S16 33 -1080 -635 S17 34 -1080 -835 S18 35 -1080 -1035 S19 36 -1056 -1235 S20 37 -830 -1235 PCF8566_7 Product data sheet LCD segment output (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 40 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates Table 22. Bonding pad description ...continued All x/y coordinates represent the position of the center of each pad with respect to the center (x/y = 0) of the chip (see Figure 31). Symbol Pad X (m) Y (m) S21 38 -630 -1235 S22 39 -430 -1235 S23 40 -230 -1235 Description REF REF C1 F REF C2 001aai300 Fig 32. Alignment marks Table 23. Alignment marks Symbol X (m) Y (m) C1 1100 1090 C2 325 -625 F -790 700 16. Handling information All input and output pins are protected against ElectroStatic Discharge (ESD) under normal handling. When handling Metal-Oxide Semiconductor (MOS) devices ensure that all normal precautions are taken as described in JESD625-A, IEC 61340-5 or equivalent standards. 17. Packing information Tray information for the PCF8566U is shown in Figure 33, Figure 35 and Table 24. PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 41 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates G A C H D B F E 001aai237 marking code Fig 33. Tray details 001aaj619 Fig 34. Tray alignment Table 24. Tray dimensions Symbol Description Value A pocket pitch; x direction 4.43 mm B pocket pitch; y direction 4.43 mm C pocket width; x direction 3.04 mm D pocket width; y direction 3.04 mm PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 42 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates Table 24. Tray dimensions ...continued Symbol Description Value E tray width; x direction 50.8 mm F tray width; y direction 50.8 mm G cut corner to pocket 1,1 center 5.47 mm H cut corner to pocket 1,1 center 5.47 mm x number of pockets; x direction 10 y number of pockets; y direction 10 18. Soldering of SMD packages This text provides a very brief insight into a complex technology. A more in-depth account of soldering ICs can be found in Application Note AN10365 "Surface mount reflow soldering description". 18.1 Introduction to soldering Soldering is one of the most common methods through which packages are attached to Printed Circuit Boards (PCBs), to form electrical circuits. The soldered joint provides both the mechanical and the electrical connection. There is no single soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and Surface Mount Devices (SMDs) are mixed on one printed wiring board; however, it is not suitable for fine pitch SMDs. Reflow soldering is ideal for the small pitches and high densities that come with increased miniaturization. 18.2 Wave and reflow soldering Wave soldering is a joining technology in which the joints are made by solder coming from a standing wave of liquid solder. The wave soldering process is suitable for the following: * Through-hole components * Leaded or leadless SMDs, which are glued to the surface of the printed circuit board Not all SMDs can be wave soldered. Packages with solder balls, and some leadless packages which have solder lands underneath the body, cannot be wave soldered. Also, leaded SMDs with leads having a pitch smaller than ~0.6 mm cannot be wave soldered, due to an increased probability of bridging. The reflow soldering process involves applying solder paste to a board, followed by component placement and exposure to a temperature profile. Leaded packages, packages with solder balls, and leadless packages are all reflow solderable. Key characteristics in both wave and reflow soldering are: * * * * * Board specifications, including the board finish, solder masks and vias Package footprints, including solder thieves and orientation The moisture sensitivity level of the packages Package placement Inspection and repair PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 43 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates * Lead-free soldering versus SnPb soldering 18.3 Wave soldering Key characteristics in wave soldering are: * Process issues, such as application of adhesive and flux, clinching of leads, board transport, the solder wave parameters, and the time during which components are exposed to the wave * Solder bath specifications, including temperature and impurities 18.4 Reflow soldering Key characteristics in reflow soldering are: * Lead-free versus SnPb soldering; note that a lead-free reflow process usually leads to higher minimum peak temperatures (see Figure 35) than a SnPb process, thus reducing the process window * Solder paste printing issues including smearing, release, and adjusting the process window for a mix of large and small components on one board * Reflow temperature profile; this profile includes preheat, reflow (in which the board is heated to the peak temperature) and cooling down. It is imperative that the peak temperature is high enough for the solder to make reliable solder joints (a solder paste characteristic). In addition, the peak temperature must be low enough that the packages and/or boards are not damaged. The peak temperature of the package depends on package thickness and volume and is classified in accordance with Table 25 and 26 Table 25. SnPb eutectic process (from J-STD-020C) Package thickness (mm) Package reflow temperature (C) Volume (mm3) < 350 350 < 2.5 235 220 2.5 220 220 Table 26. Lead-free process (from J-STD-020C) Package thickness (mm) Package reflow temperature (C) Volume (mm3) < 350 350 to 2000 > 2000 < 1.6 260 260 260 1.6 to 2.5 260 250 245 > 2.5 250 245 245 Moisture sensitivity precautions, as indicated on the packing, must be respected at all times. Studies have shown that small packages reach higher temperatures during reflow soldering, see Figure 35. PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 44 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates maximum peak temperature = MSL limit, damage level temperature minimum peak temperature = minimum soldering temperature peak temperature time 001aac844 MSL: Moisture Sensitivity Level Fig 35. Temperature profiles for large and small components For further information on temperature profiles, refer to Application Note AN10365 "Surface mount reflow soldering description". 19. Abbreviations Table 27. Abbreviations Acronym Description CMOS Complementary Metal Oxide Semiconductor DC Direct Current HBM Human Body Model I2C Inter-Integrated Circuit IC Integrated Circuit LCD Liquid Crystal Display MM Machine Model MSL Moisture Sensitivity Level POR Power-On Reset RC Resistance and Capacitance RAM Random Access Memory RMS Root Mean Square SMD Surface Mount Device TTL Transistor-Transistor Logic PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 45 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 20. Revision history Table 28. Revision history Document ID Release date Data sheet status Change notice Supersedes PCF8566_7 20090225 Product data sheet - PCF8566_6 Modifications: * The format of this data sheet has been redesigned to comply with the new identity guidelines of NXP Semiconductors. * * * * * * Legal texts have been adapted to the new company name where appropriate. Added U and TS type Added tray information Changed values in limiting values table from relative to absolute values Changed letter symbols to NXP approved symbols Rewritten chapter 7.3 PCF8566_6 19980504 Product specification - PCF8566_5 PCF8566_5 19970402 Product specification - PCF8566_4 PCF8566_4 19961203 Product specification - PCF8566_3 PCF8566_3 19961029 Product specification - PCF8566_2 PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 46 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 21. Legal information 21.1 Data sheet status Document status[1][2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification. [1] Please consult the most recently issued document before initiating or completing a design. [2] The term `short data sheet' is explained in section "Definitions". [3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URL http://www.nxp.com. 21.2 Definitions Draft -- The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Short data sheet -- A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local NXP Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. 21.3 Disclaimers General -- Information in this document is believed to be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. Right to make changes -- NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. Suitability for use -- NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in medical, military, aircraft, space or life support equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors accepts no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer's own risk. Bare die -- All die are tested on compliance with their related technical specifications as stated in this data sheet up to the point of wafer sawing and are handled in accordance with the NXP Semiconductors storage and transportation conditions. If there are data sheet limits not guaranteed, these will be separately indicated in the data sheet. There are no post-packing tests performed on individual die or wafers. NXP Semiconductors has no control of third party procedures in the sawing, handling, packing or assembly of the die. Accordingly, NXP Semiconductors assumes no liability for device functionality or performance of the die or systems after third party sawing, handling, packing or assembly of the die. It is the responsibility of the customer to test and qualify their application in which the die is used. All die sales are conditioned upon and subject to the customer entering into a written die sale agreement with NXP Semiconductors through its legal department. Applications -- Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Limiting values -- Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) may cause permanent damage to the device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the Characteristics sections of this document is not implied. Exposure to limiting values for extended periods may affect device reliability. Terms and conditions of sale -- NXP Semiconductors products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms, including those pertaining to warranty, intellectual property rights infringement and limitation of liability, unless explicitly otherwise agreed to in writing by NXP Semiconductors. In case of any inconsistency or conflict between information in this document and such terms and conditions, the latter will prevail. No offer to sell or license -- Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. 21.4 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. I2C-bus -- logo is a trademark of NXP B.V. 22. Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com PCF8566_7 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 07 -- 25 February 2009 47 of 48 PCF8566 NXP Semiconductors Universal LCD driver for low multiplex rates 23. Contents 1 2 3 4 5 6 6.1 6.2 7 7.1 7.2 7.3 7.4 7.4.1 7.4.2 7.4.3 7.4.4 7.5 7.5.1 7.5.2 7.6 7.7 7.8 7.9 7.10 7.11 7.12 7.13 7.14 7.15 7.16 8 8.1 8.1.1 8.1.1.1 8.1.2 8.1.3 8.1.4 8.1.5 8.2 8.3 8.3.1 8.3.2 8.3.3 8.3.4 8.3.5 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pinning information . . . . . . . . . . . . . . . . . . . . . . 4 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5 Functional description . . . . . . . . . . . . . . . . . . . 6 Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . . 7 LCD bias generator. . . . . . . . . . . . . . . . . . . . . . 7 LCD voltage selector . . . . . . . . . . . . . . . . . . . . 7 LCD drive mode waveforms . . . . . . . . . . . . . . 10 Static drive mode . . . . . . . . . . . . . . . . . . . . . . 10 1:2 Multiplex drive mode . . . . . . . . . . . . . . . . . 11 1:3 Multiplex drive mode . . . . . . . . . . . . . . . . . 13 1:4 multiplex drive mode . . . . . . . . . . . . . . . . . 14 Oscillator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Internal clock. . . . . . . . . . . . . . . . . . . . . . . . . . 15 External clock . . . . . . . . . . . . . . . . . . . . . . . . . 15 Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Display register . . . . . . . . . . . . . . . . . . . . . . . . 16 Shift register . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Segment outputs. . . . . . . . . . . . . . . . . . . . . . . 16 Backplane outputs . . . . . . . . . . . . . . . . . . . . . 16 Display RAM . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Data pointer . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Sub-address counter . . . . . . . . . . . . . . . . . . . 19 Output bank selector. . . . . . . . . . . . . . . . . . . . 19 Input bank selector . . . . . . . . . . . . . . . . . . . . . 19 Blinker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Basic architecture . . . . . . . . . . . . . . . . . . . . . . 20 Characteristics of the I2C-bus . . . . . . . . . . . . . 20 Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 START and STOP conditions . . . . . . . . . . . . . 21 System configuration . . . . . . . . . . . . . . . . . . . 21 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 21 PCF8566 I2C-bus controller . . . . . . . . . . . . . . 22 Input filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 I2C-bus protocol . . . . . . . . . . . . . . . . . . . . . . . 22 Command decoder . . . . . . . . . . . . . . . . . . . . . 24 Mode set command . . . . . . . . . . . . . . . . . . . . 24 Load data pointer command . . . . . . . . . . . . . . 25 Device select command . . . . . . . . . . . . . . . . . 25 Bank select command . . . . . . . . . . . . . . . . . . 25 Blink command . . . . . . . . . . . . . . . . . . . . . . . . 26 8.4 9 10 11 11.1 11.2 12 13 13.1 14 15 16 17 18 18.1 18.2 18.3 18.4 19 20 21 21.1 21.2 21.3 21.4 22 23 Display controller . . . . . . . . . . . . . . . . . . . . . . Internal circuitry . . . . . . . . . . . . . . . . . . . . . . . Limiting values . . . . . . . . . . . . . . . . . . . . . . . . Static characteristics . . . . . . . . . . . . . . . . . . . Typical supply current characteristics. . . . . . . Typical LCD output characteristics . . . . . . . . . Dynamic characteristics . . . . . . . . . . . . . . . . . Application information . . . . . . . . . . . . . . . . . Cascaded operation . . . . . . . . . . . . . . . . . . . . Package outline . . . . . . . . . . . . . . . . . . . . . . . . Bare die outline . . . . . . . . . . . . . . . . . . . . . . . . Handling information . . . . . . . . . . . . . . . . . . . Packing information . . . . . . . . . . . . . . . . . . . . Soldering of SMD packages . . . . . . . . . . . . . . Introduction to soldering. . . . . . . . . . . . . . . . . Wave and reflow soldering . . . . . . . . . . . . . . . Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . Revision history . . . . . . . . . . . . . . . . . . . . . . . Legal information . . . . . . . . . . . . . . . . . . . . . . Data sheet status . . . . . . . . . . . . . . . . . . . . . . Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . Contact information . . . . . . . . . . . . . . . . . . . . Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 26 27 28 29 30 31 33 33 37 39 41 41 43 43 43 44 44 45 46 47 47 47 47 47 47 48 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section `Legal information'. (c) NXP B.V. 2009. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 25 February 2009 Document identifier: PCF8566_7