ICS950812 Integrated Circuit Systems, Inc. Frequency Generator with 200MHz Differential CPU Clocks ICS950812 Recommended Application: Pin Configuration CK-408 clock with Buffered/Unbuffered mode supporting VDDREF 1 56 REF Almador, Brookdale, ODEM, and Montara-G chipsets with X1 2 55 FS1 PIII/P4 processor. Programmable for group to group skew. X2 3 54 FS0 Output Features: GND 4 53 CPU_STOP#* PCICLK_F0 5 52 CPUCLKT0 * 3 Differential CPU Clock Pairs @ 3.3V PCICLK_F1 6 51 CPUCLKC0 * 7 PCI (3.3V) @ 33.3MHz including 2 early PCI clocks PCICLK_F2 7 50 VDDCPU * 3 PCI_F (3.3V) @ 33.3MHz VDDPCI 8 49 CPUCLKT1 GND 9 48 CPUCLKC1 * 1 USB (3.3V) @ 48MHz, 1 DOT (3.3V) @ 48MHz PCICLK0 10 47 GND * 1 REF (3.3V) @ 14.318MHz **E_PCICLK1/PCICLK1 11 46 VDDCPU * 5 3V66 (3.3V) @ 66.6MHz PCICLK2 12 45 CPUCLKT2 **E_PCICLK3/PCICLK3 13 44 CPUCLKC2 * 1 VCH/3V66 (3.3V) @ 48MHz or 66.6MHz VDDPCI 14 43 MULTSEL* * 3 66MHz_OUT/3V66 (3.3V) @ 66.6MHz_IN or 66.6MHz GND 15 42 IREF PCICLK4 16 41 GND Features: PCICLK5 17 40 FS2 * Provides standard frequencies and additional 5% PCICLK6 18 39 48MHz_USB/FS3** and 10% over-clocked frequencies VDD3V66 19 38 48MHz_DOT * Supports spread spectrum modulation: GND 20 37 VDD48 No spread, Center Spread (0.35%, 0.5%, 66MHZ_OUT0/3V66_2 21 36 GND or 0.75%), or Down Spread (-0.5%, -1.0%, or -1.5%) 66MHZ_OUT1/3V66_3 22 35 3V66_1/VCH_CLK/FS4** 66MHZ_OUT2/3V66_4 23 34 PCI_STOP#* * Offers adjustable PCI early clock via latch inputs 66MHZ_IN/3V66_5 24 33 3V66_0/FS5** 2 * Selectable 1X or 2X strength for REF via I C interface *PD# 25 32 VDD3V66 VDDA 26 31 GND * Efficient power management scheme through PD#, GND 27 30 SCLK CPU_STOP# and PCI_STOP#. Vtt_PWRGD# 28 29 SDATA * Uses external 14.318MHz crystal * Stop clocks and functional control available through 56-Pin 300mil SSOP I2C interface. 6.10 mm. Body, 0.50 mm. pitch TSSOP Key Specifications: * These inputs have 120K internal pull-up resistors to VDD. * CPU Output Jitter <150ps ** Internal pull-down resistors to ground. * 3V66 Output Jitter <250ps Note: * 66MHz Output Jitter (Additive) (Buffered Mode) <100ps Almador board level designs MUST use pin 22, * CPU Output Skew <100ps 66MHZ_OUT1, as the feedback connection from the clock buffer path to the Almador (GMCH) chipset. Block Diagram 48MHz_USB PLL2 Frequency Select 48MHz_DOT X1 X2 XTAL OSC 3V66_5/66MHz_IN 3V66_3/66MHz_OUT1 3V66_(4,2)/66MHz_OUT(2,0) PLL1 Spread Spectrum REF CPU DIVDER Stop CPUCLKT (2:0) CPUCLKC (2:0) 3 3 PD# CPU_STOP# PCI_STOP# MULTSEL FS (5:0) SDATA SCLK VTT_PWRGD# 0542G--08/21/03 PCI DIVDER Control Logic 3V66 DIVDER Stop 7 2 PCICLK (6:4, 2, 0) E_PCICLK(1,3)/PCICLK(1,3) 3 PCICLK_F (2:0) 3V66_0 Config. Reg. 3V66_1/VCH_CLK I REF Bit FS2 FS1 FS0 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 CPUCLK MHz 66.66 100.00 200.00 133.33 66.66 100.00 200.00 133.33 3V66 MHz 66.66 66.66 66.66 66.66 66.66 66.66 66.66 66.66 66MHz_OU T (2:0) 3V66 (4:2) MHz 66.66 66.66 66.66 66.66 66MHz_IN 66MHz_IN 66MHz_IN 66MHz_IN 66MHz_IN PCICLK_F 3V66_5 MHz 66.66 66.66 66.66 66.66 Input Input Input Input PCICLK MHz 33.33 33.33 33.33 33.33 66MHz_IN/2 66MHz_IN/2 66MHz_IN/2 66MHz_IN/2 ICS950812 Pin Configuration PIN # PIN NAME PIN TYPE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 VDDREF X1 X2 GND PCICLK_F0 PCICLK_F1 PCICLK_F2 VDDPCI GND PCICLK0 **E_PCICLK1/PCICLK1 PCICLK2 **E_PCICLK3/PCICLK3 VDDPCI GND PCICLK4 PCICLK5 PCICLK6 VDD3V66 GND 66MHZ_OUT0/3V66_2 66MHZ_OUT1/3V66_3 66MHZ_OUT2/3V66_4 PWR IN OUT PWR OUT OUT OUT PWR PWR OUT I/O OUT I/O PWR PWR OUT OUT OUT PWR PWR OUT OUT OUT 24 66MHZ_IN/3V66_5 I/O 25 *PD# IN 26 27 VDDA GND PWR PWR 28 Vtt_PWRGD# IN DESCRIPTION Ref, XTAL power supply, nominal 3.3V Crystal input, Nominally 14.318MHz. Crystal output, Nominally 14.318MHz Ground pin. Free running PCI clock not affected by PCI_STOP# . Free running PCI clock not affected by PCI_STOP# . Free running PCI clock not affected by PCI_STOP# . Power supply for PCI clocks, nominal 3.3V Ground pin. PCI clock output. Early/Normal PCI clock output latched at power up. PCI clock output. Early/Normal PCI clock output latched at power up. Power supply for PCI clocks, nominal 3.3V Ground pin. PCI clock output. PCI clock output. PCI clock output. Power pin for the 3V66 clocks. Ground pin. 3.3V 66.66MHz clock output selected via buffered or internal VCO. 3.3V 66.66MHz clock output selected via buffered or internal VCO. 3.3V 66.66MHz clock output selected via buffered or internal VCO. 3.3V 66.66MHz clock from internal VCO, 66MHZ input to 66MHz output and PCI. Asynchronous active low input pin used to power down the device into a low power state. The internal clocks are disabled and the VCO and the crystal are stopped. The latency of the power down will not be greater than 1.8ms. 3.3V power for the PLL core. Ground pin. This 3.3V LVTTL input is a level sensitive strobe used to determine when latch inputs are valid and are ready to be sampled. This is an active low input. 0542G--08/21/03 2 ICS950812 Pin Configuration (Continued) PIN # PIN NAME PIN TYPE 29 30 31 32 33 SDATA SCLK GND VDD3V66 3V66_0/FS5** I/O IN PWR PWR I/O 34 PCI_STOP#* IN 35 3V66_1/VCH_CLK/FS4** I/O 36 37 38 39 40 41 GND VDD48 48MHz_DOT 48MHz_USB/FS3** FS2 GND PWR PWR OUT I/O IN PWR 42 IREF OUT 43 MULTSEL* IN 44 CPUCLKC2 OUT 45 CPUCLKT2 OUT 46 47 VDDCPU GND PWR PWR 48 CPUCLKC1 OUT 49 CPUCLKT1 OUT 50 VDDCPU PWR 51 CPUCLKC0 OUT 52 CPUCLKT0 OUT 53 54 55 56 CPU_STOP#* FS0 FS1 REF IN IN IN OUT DESCRIPTION Data pin for I2C circuitry 5V tolerant Clock pin of I2C circuitry 5V tolerant Ground pin. Power pin for the 3V66 clocks. Frequency select latch input pin / 3.3V 66.66MHz clock output. Stops all PCICLKs besides the PCICLK_F clocks at logic 0 level, when input low Frequency select latch input pin / 3.3V 66.66MHz clock output / 48MHz VCH clock output. Ground pin. Power pin for the 48MHz output.3.3V 48MHz clock output. Frequency select latch input pin / 3.3V 48MHz clock output. Frequency select pin. Ground pin. This pin establishes the reference current for the differential current-mode output pairs. This pin requires a fixed precision resistor tied to ground in order to establish the appropriate current. 475 ohms is the standard value. 3.3V LVTTL input for selection the current multiplier for CPU outputs Complimentary clock of differential pair CPU outputs. These are current mode outputs. External resistors are required for voltage bias. True clock of differential pair CPU outputs. These are current mode outputs. External resistors are required for voltage bias. Supply for CPU clocks, 3.3V nominal Ground pin. Complimentary clock of differential pair CPU outputs. These are current mode outputs. External resistors are required for voltage bias. True clock of differential pair CPU outputs. These are current mode outputs. External resistors are required for voltage bias. Supply for CPU clocks, 3.3V nominal Complimentary clock of differential pair CPU outputs. These are current mode outputs. External resistors are required for voltage bias. True clock of differential pair CPU outputs. These are current mode outputs. External resistors are required for voltage bias. Stops all CPUCLK besides the free running clocks Frequency select pin. Frequency select pin. 14.318 MHz reference clock. 0542G--08/21/03 3 ICS950812 Frequency Select Table 1 Freq Sel FS FS FS 2 1 0 FS(5:3) From 000 to 101 (See table 2) 110 (See table 2) 111 (See table 2) CPU MHz 3V66 MHz 66MHz_OU T (2:0) 66MHz_IN 3V66 (4:2) 3V66 _5 Freq Sel REF MHz USB/DOT MHz 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 66.66 100.00 200.00 133.33 66.66 100.00 200.00 133.33 70.00 105.00 Tristate 140.00 70.00 105.00 Tristate 140.00 73.32 110.00 Test/2 146.60 73.32 110.00 Test/2 66.66 66.66 66.66 66.66 66.66 66.66 66.66 66.66 70.00 70.00 Tristate 70.00 70.00 70.00 Tristate 70.00 73.32 73.32 Test/4 73.32 73.32 73.32 Test/4 66.66 66.66 66.66 66.66 66MHz_IN 66MHz_IN 66MHz_IN 66MHz_IN 70.00 70.00 Tristate 70.00 66MHz_IN 66MHz_IN Tristate 66MHz_IN 73.32 73.32 Test/4 73.32 66MHz_IN 66MHz_IN Test/4 66.66 66.66 66.66 66.66 Input Input Input Input 70.00 70.00 Tristate 70.00 Input Input Tristate Input 73.32 73.32 Test/4 73.32 Input Input Test/4 33.33 33.33 33.33 33.33 66MHz_IN/2 66MHz_IN/2 66MHz_IN/2 66MHz_IN/2 35.00 35.00 Tristate 35.00 66MHz_IN/2 66MHz_IN/2 Tristate 66MHz_IN/2 36.66 36.66 Test/8 36.66 66MHz_IN/2 66MHz_IN/2 Test/8 14.318 14.318 14.318 14.318 14.318 14.318 14.318 14.318 14.318 14.318 Tristate 14.318 14.318 14.318 Tristate 14.318 14.318 14.318 Test 14.318 14.318 14.318 Test 48.008 48.008 48.008 48.008 48.008 48.008 48.008 48.008 48.008 48.008 Tristate 48.008 48.008 48.008 Tristate 48.008 48.008 48.008 Test/2 48.008 48.008 48.008 Test/2 1 1 1 146.60 73.32 66MHz_IN Input 66MHz_IN/2 14.318 48.008 Frequency Select Table 2 FS FS FS 5 4 3 PCI MHz CPU, 3V66, 66MHz_OUT, 66MHz_IN, PCI Clocking Mode 0 0 0 Standard Clocking No Spread (default) or +/-0.4% 0 0 1 Standard Clocking 0 to -0.5%, Down Spread 0 1 0 Standard Clocking 0 to -1.0%, Down Spread 0 1 1 Standard Clocking 0 to -1.5%, Down Spread 1 0 0 Standard Clocking +/-0.5%, Center Spread 1 0 1 Standard Clocking +/-0.75%, Center Spread 1 1 0 5% Overclocking +/-0.35%, Center Spread 1 1 1 10% Overclocking +/-0.35%, Center Spread Note: To enable spread, Byte 0 Bit 7 must be set to 1. 0542G--08/21/03 4 Clocking Mode Standard Clocking Standard Clocking 5% Overclocking Tristate 5% Overclocking Tristate 5% Overclocking 10% Overclocking Test 10% Overclocking Test 10% Overclocking ICS950812 Maximum Allowed Current Condition Max 3.3V supply consumption Max discrete cap loads, Vdd = 3.465V All static inputs = Vdd or GND Powerdown Mode (PD# = 0) 40mA Active Full 280mA Host Swing Select Functions MULTSEL Board Target Trace/Term Z Reference R, Iref = VDD/3*Rr Output Current Voh @ Z 0 50 ohms Rr = 221 1%, Iref = 5.00mA Ioh = 4 * I REF 1.0V @ 50 ohm 1 50 ohms Rr = 475 1%, Iref = 2.32mA Ioh = 6 * I REF 0.7V @ 50 ohm PCI Select Functions * E_PCICLK1 (11) E_PCICLK3 (13) E_PCICLK(3,1) 0 0 1 1 0 1 0 1 0ns 0.5ns 1.0ns 1.5ns Note: E_PCICLK1 = 10Kohm resistor. E_PCICLK3 = 10Kohm resistor. 0 = No resistor 1 = 10Kohm pull-up to VDD. * Approximate values 0542G--08/21/03 5 ICS950812 BYTE 0 Bit 7 Pin # - Affected Pin Name Spread Enabled Bit 6 - CPUCLKT(2:0) Bit 5 Bit 4 35 53 3V66_1/VCH_CLK/FS4** CPU_STOP#* Bit 3 34 PCI_STOP#* Bit 2 39 FS3 Bit 1 55 FS1 Bit 0 54 FS0 Note: For PCI_STOP# function, refer to table 3. BYTE 1 Bit 7 Pin # 43 Affected Pin Name MULTSEL* Control Function Type Spread Spectrum Control Power down mode output level 0= CPU driven in power down 1= undriven VCH/66.66 Select Reflects value of pin Reflects value of pin at power up. Also can be set. Frequency Selection Frequency Selection Frequency Selection RW Bit Control 0 1 OFF ON RW HIGH LOW 0 RW R 66.66 Stop 48.00 Active 0 X RW Stop Active X RW R R - - X X X Control Function Reflects value of pin CPU_Stop mode output level Bit 6 CPUCLKT(2:0) 0= CPU driven when stopped 1 = undriven CPUCLKT2, CPUCLKC2 Allow control of output with Bit 5 45, 44 (see note) assertion of CPU_STOP#. CPUCLKT1, CPUCLKC1 Allow control of output with Bit 4 49, 48 (see note) assertion of CPU_STOP#. CPUCLKT0, CPUCLKC0 Allow control of output with Bit 3 52, 51 (see note) assertion of CPU_STOP#. Bit 2 45, 44 CPUCLKT2, CPUCLKC2 Output control Bit 1 49, 48 CPUCLKT1, CPUCLKC1 Output control Bit 0 52, 51 CPUCLKT0, CPUCLKC0 Output control Note: CPUCLK(2:0) can be turned on/off by CPU_STOP#. Refer to table 4. BYTE 2 Pin # Bit 7 56 Bit 6 18 Bit 5 17 Bit 4 16 Bit 3 13 Bit 2 12 Bit 1 11 Bit 0 10 Note: PCICLK(6:0) BYTE 3 Bit 7 Bit 6 Affected Pin Control Function Name REF 1X or 2X Strength control PCICLK6 Output control PCICLK5 Output control PCICLK4 Output control **E_PCICLK3/PCICLK3 Output control PCICLK2 Output control **E_PCICLK1/PCICLK1 Output control PCICLK0 Output control can be turned on/off by PCI_STOP#. Refer to table 3. Affected Pin Pin # 38 39 Control Function Name 48MHz_DOT 48MHz_USB/FS3** Output control Output control Allow control of output with Bit 5 7 PCICLK_F2 (see note) assertion of PCI_STOP#. Allow control of output with Bit 4 6 PCICLK_F1 (see note) assertion of PCI_STOP#. Allow control of output with Bit 3 5 PCICLK_F0 (see note) assertion of PCI_STOP#. Bit 2 7 PCICLK_F2 Output control Bit 1 6 PCICLK_F1 Output control Bit 0 5 PCICLK_F0 Output control Note: PCICLK_F(2:0) can be turned on/off by PCI_STOP#. Refer to table 5. 0542G--08/21/03 6 Type R RW RW RW RW RW RW RW Type RW RW RW RW RW RW RW RW Type Bit Control 0 1 HIGH Not Freerun Not Freerun Not Freerun Disable Disable Disable PWD 0 PWD x LOW 0 Freerun 0 Freerun 0 Freerun 0 Enable Enable Enable 1 1 1 Bit Control 0 1 1X 2X Disable Enable Disable Enable Disable Enable Disable Enable Disable Enable Disable Enable Disable Enable PWD 0 1 1 1 1 1 1 1 Bit Control RW RW 0 Disable Disable RW Freerun RW Freerun RW Freerun RW RW RW Disable Disable Disable 1 Enable Enable Not Freerun Not Freerun Not Freerun Enable Enable Enable PWD 1 1 0 0 0 1 1 1 ICS950812 BYTE 4 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # 35 33 33 35 24 23 22 21 BYTE 5 Bit 7 Bit 6 Pin # X X Bit 5 X Bit 4 X 3V66(1:0) (See table 7) 38 48MHz_DOT Slew Control 39 48MHz_USB Slew Control Bit 3 Bit 2 Bit 1 Bit 0 Affected Pin Name FS4 FS5 3V66_0/FS5** 3V66_1/VCH_CLK/FS4** 66MHZ_IN/3V66_5 66MHZ_OUT2/3V66_4 66MHZ_OUT1/3V66_3 66MHZ_OUT0/3V66_2 Affected Pin Name 3V66(5:2)/66MHZ_OUT(2:0) (See table 6) Control Function Type Frequency Selection Frequency Selection Output control Output control Output control Output control Output control Output control RW RW RW RW RW RW RW RW Control Function Type Unused Reserved Allow control of output with assertion of CPU_STOP#. Allow control of output with assertion of CPU_STOP#. 00 = Medium (default), 01 = Low, 11,10 =High 00 = Medium (default), 01 = Low, 11,10 =High X X X RW RW RW RW Bit Control 0 1 Disable Enable Disable Enable Disable Enable Disable Enable Disable Enable Disable Enable Disable Enable Disable Enable Bit Control 0 1 Not Freerun Freerun Not Freerun Freerun - - PWD X X 1 1 1 1 1 1 PWD 0 0 0 0 0 0 0 0 Note: Functions in Byte 5 of CK408 were intended as a test and debug byte only. BYTE 6 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # X X X X X X X X Affected Pin Name Revision ID Bit 3 Revision ID Bit 2 Revision ID Bit 1 Revision ID Bit 0 Vendor ID Bit 3 Vendor ID Bit 2 Vendor ID Bit 1 Vendor ID Bit 0 BYTE 7 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # X X X X X X X X Affected Pin Name - BYTE 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Pin # X X X X X X Affected Pin Name - Bit 1 X - Control Function Type Bit Control 0 1 - PWD X X X X 0 0 0 1 Bit Control 0 1 - PWD 0 0 0 0 0 0 0 0 PWD 0 0 0 0 1 1 (Reserved) (Reserved) (Reserved) (Reserved) R R R R R R R R Control Function Type Unused Unused Unused Unused Unused Unused Unused Unused R R R R R R R R Control Function Type (Reserved) (Reserved) (Reserved) (Reserved) X X X X R R Bit Control 0 1 - R - Revision ID Value Based on Device Revision Readback Byte Count - 1 Bit 0 X R 1 Note: Byte 8 is for ICS test only. Do not write as system damage may occur. Bit(3:0) contain the readback Byte count. 0542G--08/21/03 7 ICS950812 BYTE 9 Pin # Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 BYTE 10 Pin # Affected Pin Name 35 VCHCLK Slew Control 7, 6, 5 PCICLK_F (2:0) Slew Contol 13, 12, 11, 10 PCICLK (3:0) Slew Contol 18, 17, 16, 13, 12, 11, 10 PCICLK (6:0) Slew Contol Affected Pin Name Control Function Type 00 = High(default), 01 = Low, 11,10 = Medium 00 (default), 11 = Medium 01 = Low, 10 =High 00 (default), 11 = Medium 10 = Low, 01 =High 00 (default), 11 = Medium 10 = Low, 01 =High RW RW RW RW RW RW RW RW Control Function Type M/N Enable (Enable access to Byte 11 - 14) Unused Bit 7 X - Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 X 24, 23, 22, 21 3V66(5:2)/66MHZ_OUT(2:0) Skew 33, 35 3V66(1:0) Skew Approx 250ps per bit (Ref to PCI) X X - Unused Unused Approx 250ps per bit (Ref to PCI) RW RW RW RW RW - Bit Control 0 1 - Bit Control 0 1 Byte HW/B0 (11-14) - BYTE Affected Pin Bit Control Control Function Type Pin # Name 0 1 11 Bit 7 X VCO Divider Bit8 RW Bit 6 X REF Divider Bit6 RW Bit 5 X REF Divider Bit5 RW Bit 4 X REF Divider Bit4 RW Bit 3 X REF Divider Bit3 RW Bit 2 X REF Divider Bit2 RW Bit 1 X REF Divider Bit1 RW Bit 0 X REF Divider Bit0 RW Note: The decimal representation of these 7 bits (Byte 11 bit[6:0]) + 2 is equal to the REF divider value. Note: See table 8 for Byte 11-14 default information BYTE 12 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # X X X X X X X X Affected Pin Name - Control Function VCO VCO VCO VCO VCO VCO VCO VCO Divider Divider Divider Divider Divider Divider Divider Divider Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Type RW RW RW RW RW RW RW RW Bit Control 0 1 - PWD 0 0 0 0 0 0 0 0 PWD 0 0 0 0 0 0 0 0 PWD X X X X X X X X PWD X X X X X X X X Note: The decimal representation of these 9 bits (Byte 12 bit[7:0]) and Byte 11 bit [7]) + 8 is equal to the VCO divider value. Note: See table 8 for Byte 11-14 default information 0542G--08/21/03 8 ICS950812 BYTE 13 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # X X X X X X X X Affected Pin Name - Control Function Type Spread Spectrum Bit7 Spread Spectrum Bit6 Spread Spectrum Bit5 Spread Spectrum Bit4 Spread Spectrum Bit3 Spread Spectrum Bit2 Spread Spectrum Bit1 Spread Spectrum Bit0 RW RW RW RW RW RW RW RW Bit Control 0 1 - PWD X X X X X X X X Note: Please utilize software utility provided by ICS Application Engineering to configure spread spectrum. Incorrect spread percentage may cause system failure. Note: See table 8 for Byte 11-14 default information BYTE 14 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # X X X X X X X X Affected Pin Name - Control Function Type (Reserved) (Reserved) Spread Spectrum Bit13 Spread Spectrum Bit12 Spread Spectrum Bit11 Spread Spectrum Bit10 Spread Spectrum Bit9 Spread Spectrum Bit8 RW RW RW RW RW RW RW RW Bit Control 0 1 - PWD X X X X X X X X Note: Please utilize software utility provided by ICS Application Engineering to configure spread spectrum. Incorrect spread percentage may cause system failure. Note: See table 8 for Byte 11-14 default information Spread Spectrum Enable Procedure Step 1: Power-up ---- Latched inputs, FS(5:0), set frequency per Hardware default on board. SS is off. BIOS program set IIC Byte0, bit7 to 1, SS will be enable Spread. Note that Byte 10, bit 7 is default to 0. This allows all setup to be controlled by the Frequency Select Tables, 1 and 2. Step 2: After power up, SS% can be changed to the fixed selections shown in Frequency Table 2. This is achieved by Writing to Byte 4, bit 6/7 (FS5:4) and/or Byte 0 (FS3), The data written to these bytes will overwrite the existing contents and switch to the desired selection. Step 3: To set up Linear programming and SS% adjust using Byte 11 through 14, the BIOS must set Byte 10, bit 7 to a 1. This will enable access to Byte 11 and 12, M/N linear programming and Byte 13 and 14, Spread Spectrum % adjust. 0542G--08/21/03 9 ICS950812 Table 3 PCI_STOP# I2C Control Table-Byte 0, Bit 3 PCI_STOP# (Pin 34) Byte 0 Bit 3 Write Bit Byte 0, Bit 3 Read Bit (Internal Status) 0 0 0 0 1 0 1 0 0 1 1 1 Note: When this Byte 0, Bit 3 is low (0), all PCI clocks are stopped. Table 4 CPUCLKT/C (2:0) Outputs I2C Control Table Byte 1 CPU_STOP# CPUCLKT/C (2:0) Outputs Bit 3, 4, 5 (Pin 53) 0 0 Stop 0 1 Running 1 0 Running 1 1 Running Note: Individual CPUCLK outputs are controlled by Byte 1, Bit 3, 4, and 5. Table 5 PCICLK_F (2:0) Outputs I2C Control Table PCI_STOP# Byte 3 PCICLK (2:0) Outputs Bit 3, 4, 5 (Pin 34) 0 0 Stop 0 1 Running 1 0 Running 1 1 Running Note: Individual PCICLK outputs are controlled by Byte 3, Bit 3, 4, and 5. Table 6 3V66 (5:2)/66MHz_OUT(2:0)/66MHz_IN I2C Control Table CPU_STOP# (Pin 53) Byte 5 Bit 5 3V66 (5:2) (Driven) 66MHZ_OUT(2:0)/66MHZ_IN (Buffered) 0 0 Running 0 1 Stopped 1 0 Running 1 1 Running Note: Activating Byte 5, Bit 5 will allow CPU_STOP# to control stop of pins 21, 22, 23, and 24. 0542G--08/21/03 10 ICS950812 Table 7 3V66 (0:1) I2C Control Table CPU_STOP# Byte 5 3V66 (1:0) (Pin 53) Bit 4 0 0 Running 0 1 Stopped 1 0 Running 1 1 Running Note: Activating Byte 5, Bit 4 will allow CPU_STOP# to control stop of pins 33 and 35. Table 8: Byte 11-14 Defaults ADDRESS CPU FS5 FS4 FS3 FS1 FS0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 31 1 1 1 1 1 Freq 66.66 99.99 199.98 133.32 66.50 99.75 199.50 133.00 66.34 99.51 199.02 132.68 66.16 99.23 198.47 132.31 66.66 99.99 199.98 133.32 66.66 99.99 199.98 133.32 70.00 105.00 210.00 140.00 73.33 109.99 219.98 146.65 Bytes Spread Center Down Center Center Center Center Down Down Down Down Down Down Down Down Down Down Down Down Center Center Center Center Center Center Center Center Center Center Center Center Center Center Center Center 0.40% 0.40% 0.40% 0.40% -0.48% -0.48% -0.48% -0.48% -0.98% -0.98% -0.98% -0.98% -1.52% -1.52% -1.52% -1.52% 0.51% 0.51% 0.51% 0.51% 0.74% 0.74% 0.74% 0.74% 0.35% 0.35% 0.35% 0.35% 0.34% 0.34% 0.34% 0.34% I2C read back values in Hex. I2C read back values in binary. 11 12 13 14 11 12 13 14 8D 8D 8D 8D 8D 8D 8D 8D 8D 8D 8D 8D 90 90 90 90 8D 8D 8D 8D 8D 8D 8D 8D 8D 8D 8D 8D 89 89 89 89 9B 9B 9B 9B 9A 9A 9A 9A 99 99 99 99 EB EB EB EB 9B 9B 9B 9B 9B 9B 9B 9B B0 B0 B0 B0 4A 4A 4A 4A 02 02 02 02 EF EF EF EF E7 E7 E7 E7 DD DD DD DD 05 05 05 05 0B 0B 0B 0B 35 35 35 35 68 68 68 68 18 18 18 18 17 17 17 17 17 17 17 17 17 17 17 17 18 18 18 18 18 18 18 18 19 19 19 19 1A 1A 1A 1A 10001101 10001101 10001101 10001101 10001101 10001101 10001101 10001101 10001101 10001101 10001101 10001101 10010000 10010000 10010000 10010000 10001101 10001101 10001101 10001101 10001101 10001101 10001101 10001101 10001101 10001101 10001101 10001101 10001001 10001001 10001001 10001001 10011011 10011011 10011011 10011011 10011010 10011010 10011010 10011010 10011001 10011001 10011001 10011001 11101011 11101011 11101011 11101011 10011011 10011011 10011011 10011011 10011011 10011011 10011011 10011011 10110000 10110000 10110000 10110000 01001010 01001010 01001010 01001010 00000010 00000010 00000010 00000010 11101111 11101111 11101111 11101111 11100111 11100111 11100111 11100111 11011101 11011101 11011101 11011101 00000101 00000101 00000101 00000101 00001011 00001011 00001011 00001011 00110101 00110101 00110101 00110101 01101000 01101000 01101000 01101000 00011000 00011000 00011000 00011000 00010111 00010111 00010111 00010111 00010111 00010111 00010111 00010111 00010111 00010111 00010111 00010111 00011000 00011000 00011000 00011000 00011000 00011000 00011000 00011000 00011001 00011001 00011001 00011001 00011010 00011010 00011010 00011010 0542G--08/21/03 11 ICS950812 Absolute Maximum Ratings Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . GND -0.5 V to VDD +0.5 V Ambient Operating Temperature . . . . . . . . . . 0C to +90C Case Temperature . . . . . . . . . . . . . . . . . . . . . . 115C Storage Temperature . . . . . . . . . . . . . . . . . . . . -65C to +150C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress specifications only and functional operation of the device at these or any other conditions above those listed in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability. Electrical Characteristics - Input/Supply/Common Output Parameters TA = 0 - 90C; Supply Voltage VDD = 3.3 V +/-5% PARAMETER SYMBOL Input High Voltage V IH 2 Input Low Voltage VIL VSS0.3 IIH Input High Current IIH IIL1 Input Low Current IIL2 CONDITIONS VIN = VDD; Inputs with no pull-down resistors VIN = VDD; Inputs with pull-down resistors VIN = 0 V; Inputs with no pull-up resistors VIN = 0 V; Inputs with pull-up resistors MIN TYP MAX VDD+0. 3 UNITS 0.8 V 5.75 mA 200 A V -5.75 mA -200 A IDD3.3OP CL = Full load; Select @ 100 MHz 233 280 mA IDD3.3OP CL =Full load; Select @ 133 MHz 234 280 mA IDD3.3PD IDD3.3PDHIz Fi Lpin CIN COUT CINX IREF=5 mA 20 0.289 14.32 52 0.5 30 7 5 6 45 mA mA MHz nH pF pF pF 1 2.1 ms 12 12 ns ns Operating Supply Current Powerdown Current Input Frequency Pin Inductance Input Capacitance1 Clk Stabilization1,2 TSTAB Delay 1 tPZH,tPZL tPHZ,tPLZ V DD = 3.3 V Logic Inputs Output pin capacitance X1 & X2 pins From PowerUp or deassertion of PowerDown to 1st clock. Output enable delay (all outputs) Output disable delay (all outputs) 1 Guaranteed by design, not 100% tested in production. See timing diagrams for buffered and un-buffered timing requirements. 2 0542G--08/21/03 12 27 1 1 ICS950812 Electrical Characteristics - CPU (1V Select) 100MHz TA = 0 - 90C; VDD=3.3V +/-5%; CL = 10-20 pF (unless otherwise specified) PARAMETER Current Source Output Impedance Average Period Output High Voltage Output Low Voltage Rise Time Fall Time Duty Cycle Skew Jitter, Cycle to cycle SYMBOL CONDITIONS MIN Zo1 V O = Vx 2500 TPERIOD V OH3 V OL3 tr3 tf3 dt3 tsk3 Fig. 5 10.00 0.92 -0.2 175 175 45 tjcyc-cyc 1 Measured from Single Ended Waveform VOL = 0.41V, VOH = 0.86V (Fig. 6) VOH = 0.86V VOL = 0.41V (Fig.6) Fig. 5 VT = 50% VT = 50% TYP MAX UNITS 10.01 390 305 51 10 40 10.20 1.45 0.35 540 540 55 100 175 ns V ps ps % ps ps 1 Guaranteed by design, not 100% tested in production. IOWT can be varied and is selectable thru the MULTSEL pin. 2 Electrical Characteristics - CPU (0.7V Select) 100MHz TA = 0 - 90C; VDD=3.3V +/-5%; (unless otherwise specified) PARAMETER Current Source Output Impedance Average Period Voltage High Voltage Low Max Voltage Min Voltage Crossing Voltage (abs) Crossing Voltage (var) Rise Time Fall Time Rise Time Variation Fall Time Variation Duty Cycle Skew Jitter, Cycle to cycle SYMBOL CONDITIONS MIN Zo1 VO = V x 3000 TPERIOD VHigh VLow Vovs Vuds Vcross(abs) d-Vcross tr tf d-t r d-t f dt3 t sk3 Fig. 1 Statistical measurement on single ended signal using oscilloscope math function. Measurement on single ended signal using absolute value. Fig. 3 Variation of crossing over all edges (Fig. 4) VOL = 0.175V, VOH = 0.525V (Fig. 3) VOH = 0.525V VOL = 0.175V (Fig. 3) 10.00 660 -150 Measurement from differential wavefrom (Fig 1) VT = 50% 45 t jcyc-cyc 1 VT = 50% (Fig. 1) 1 Guaranteed by design, not 100% tested in production. IOWT can be varied and is selectable thru the MULTSEL pin. 2 0542G--08/21/03 13 -450 250 175 175 TYP MAX UNITS 10.01 720 15 750 -2 319 12 310 300 10 10 51 16 10.20 850 150 1150 ns mV 550 140 810 810 125 125 55 100 mV mV ps ps ps ps % ps 48 175 ps mV ICS950812 Electrical Characteristics - CPU (0.7V Select) 133.33MHz TA = 0 - 90C; VDD=3.3V +/-5%; (unless otherwise specified) PARAMETER Current Source Output Impedance Average Period Voltage High Voltage Low Max Voltage Min Voltage Crossing Voltage (abs) Crossing Voltage (var) Rise Time SYMBOL CONDITIONS MIN Zo1 VO = Vx 3000 TPERIOD VHigh VLow Vovs Vuds Vcross(abs) d-Vcross Fig. 1 Statistical measurement on single ended signal using oscilloscope math function. Measurement on single ended signal using absolute value. Fig. 3 Variation of crossing over all edges (Fig. 4) 7.50 660 -150 tr VOL = 0.175V, VOH = 0.525V (Fig. 3) VOH = 0.525V VOL = 0.175V (Fig. 3) Fall Time tf Rise Time Variation Fall Time Variation d-tr d-tf Duty Cycle dt3 Skew tsk3 Jitter, Cycle to cycle tjcyc-cyc MAX UNITS 7.51 718 17 730 7 340 15 7.65 850 150 1150 550 140 mV mV 175 310 810 ps 175 315 810 ps 5 5 125 125 ps ps 51 55 % VT = 50% 14 100 ps VT = 50% (Fig. 1) 75 175 ps TYP 33 MAX 65 UNITS Measurement from differential wavefrom (Fig 1) 1 TYP -450 250 45 ns mV mV 1 Guaranteed by design, not 100% tested in production. 2 I OWT can be varied and is selectable thru the MULTSEL pin. Electrical Characteristics - PCICLK Buffered Mode TA = 0 - 90C; VDD = 3.3V +/-5%; CL = 10-30 pF (unless otherwise specified) PARAMETER Output Impedance Output High Voltage Output Low Voltage Output High Current Output Low Current Rise Time Fall Time Duty Cycle Skew Jitter,cycle to cyc SYMBOL RDSP11 V OH1 V OL1 IOH1 IOL1 tr11 tf11 dt11 tsk11 tjcyc-cyc 1 CONDITIONS V O = V DD*(0.5) MIN 12 IOH = -1 mA 2.05 V IOL = 1 mA 0.65 V VOH@MIN = 1.0V, V OH@MAX = 3.135V -33 -28 mA V OL @MIN = 1.95V, VOL @MAX = 0.4V 26 38 mA VOL = 0.4 V, VOH = 2.4 V (Fig. 7) 0.5 1.4 2.3 ns VOH = 2.4 V, VOL = 0.4 V (Fig. 7) 0.5 1.2 2.3 ns V T = 1.5 V 45 52 55 % V T = 1.5 V 35 500 ps V T = 1.5 V (Additive) (Fig. 8) 60 120 ps 1 Guaranteed by design, not 100% tested in production. 0542G--08/21/03 14 ICS950812 Electrical Characteristics - PCICLK Un-Buffered Mode TA = 0 - 90C; VDD=3.3V +/-5%; CL = 10-30 pF (unless otherwise specified) PARAMETER Output Impedance Average Period Output High Voltage Output Low Voltage Output High Current Output Low Current Rise Time Fall Time Duty Cycle Skew Jitter,cycle to cyc SYMBOL RDSP11 TPERIOD VOH1 VOL1 IOH1 IOL1 tr11 tf11 dt11 tsk11 tjcyc-cyc CONDITIONS VO = VDD*(0.5) MIN 12 TYP 33 Fig. 8 IOH = -1 mA 30.00 2.05 30.01 IOL = 1 mA MAX 65 UNITS ns V 0.65 V VOH@MIN = 1.0V, VOH@MAX = 3.135V -33 -28 mA V OL @MIN = 1.95 V, VOL @MAX = 0.4 V 26 38 mA VOL = 0.4 V, VOH = 2.4 V (Fig. 7) 0.5 1.4 2.3 ns VOH = 2.4 V, VOL = 0.4 V (Fig. 7) 0.5 1.2 2.3 ns V T = 1.5 V (Fig. 8) 45 50 55 % VT = 1.5 V 65 500 ps V T = 1.5 V (Fig. 8) 101 290 ps 1 1 Guaranteed by design, not 100% tested in production. Electrical Characteristics- 3V66 - Buffered Mode: 3V66 [1:0] 66MHz_OUT [2:0] TA = 0 - 90C; VDD=3.3V +/-5%; CL = 10-30 pF (unless otherwise specified) PARAMETER Output Impedance SYMBOL RDSP11 CONDITIONS V O = V DD*(0.5) MIN 12 Output High Voltage VOH1 IOH = -1 mA 2.05 Output Low Voltage Skew VOL1 IOH1 IOL1 tr11 tf11 dt11 tsk11 Jitter tjcyc-cyc 1 Skew Jitter Output High Current Output Low Current Rise Time Fall Time Duty Cycle TYP 33 MAX 65 UNITS V IOL = 1 mA 0.65 V -33 -28 mA VOL @MIN = 1.95 V, V OL @MAX = 0.4 V 26 38 mA VOL = 0.4 V, VOH = 2.4 V (Fig. 7) 0.5 1.6 2.3 ns VOH = 2.4 V, V OL = 0.4 V (Fig. 7) 0.5 1 2.3 ns VT = 1.5 V (Fig. 8) 45 52 55 % 10 250 ps V T = 1.5 V 3V66 [1:0] (Additive) (Fig. 8) 83 120 ps tsk11 VT = 1.5 V 66MHz_OUT [2:0] 169 250 ps tjcyc-cyc 1 VT = 1.5V 66MHz_OUT [2:0] (Fig. 8) 83 290 ps V OH@MIN = 1.0 V, V VT = 1.5 V 1 Guaranteed by design, not 100% tested in production. 0542G--08/21/03 15 OH@MAX = 3.135 V 3V66 [1:0] ICS950812 Electrical Characteristics - 3V66 -Un-Buffered Mode: 3V66 [5:0] TA = 0 - 90C; VDD=3.3V +/-5%; CL = 10-30 pF (unless otherwise specified) PARAMETER Output Impedance SYMBOL Average Period Output High Voltage TPERIOD Output Low Voltage Output High Current Output Low Current Rise Time Fall Time Duty Cycle Skew Jitter CONDITIONS VO = VDD*(0.5) MIN 12 TYP 33 MAX 65 UNITS Fig. 8 IOH = -1 mA 15.00 2.05 15.01 15.30 ns V 0.65 V -33 -28 mA V OL @MIN = 1.95 V, VOL @MAX = 0.4 V 26 38 mA VOL = 0.4 V, VOH = 2.4 V (Fig. 7) 0.5 1.6 2.3 ns VOH = 2.4 V, VOL = 0.4 V (Fig. 7) 0.5 1.2 2.3 ns V T = 1.5 V (Fig. 8) 45 48 55 % VT = 1.5 V 40 250 ps VT = 1.5 V (Fig. 8) 133 290 ps RDSP11 V OH1 VOL1 IOH1 IOL1 tr11 tf11 dt11 tsk11 tjcyc-cyc IOL = 1 mA V OH@MIN 1 = 1.0 V, V OH@MAX = 3.135 V 1 Guaranteed by design, not 100% tested in production. Electrical Characteristics - VCH, 48MHz DOT, 48MHz, USB TA = 0 - 90C; VDD=3.3V +/-5%; CL = 10-20 pF (unless otherwise specified) PARAMETER SYMBOL CONDITIONS Fig. 8 Output Frequency FO1 1 VO = VDD*(0.5) Output Impedance RDSP1 1 IOH = -1 mA Output High Voltage VOH 1 Output Low Voltage V OL Output High Current IOH1 Output Low Current IOL1 48DOT Rise Time tr11 tf11 tr11 tf11 dt11 dt11 48DOT Fall Time VCH 48 USB Rise Time VCH 48 USB Fall Time 48 DOT Duty Cycle VCH 48 USB Duty Cycle 48 DOT Jitter tjcyc-cyc USB to DOT Skew tsk11 VCH Jitter tjcyc-cyc MIN 20 TYP 48 48 1 70 2.05 UNITS MHz V IOL = 1 mA 0.5 V -29 -20 mA VOL @MIN = 1.95 V, VOL @MAX = 0.4 V 25 27 mA VOL = 0.4 V, VOH = 2.4 V (Fig. 7) 0.5 0.7 1.15 ns VOH = 2.4 V, VOL = 0.4 V (Fig. 7) 0.5 0.8 1.15 ns VOL = 0.4 V, VOH = 2.4 V (Fig. 7) 1 1.2 2.3 ns VOH = 2.4 V, VOL = 0.4 V (Fig. 7) 1 1.4 2.3 ns VT = 1.5 V (Fig. 8) 45 53 55 % VT = 1.5 V (Fig. 8) 45 V 1 MAX OH@MIN = 1.0 V, V OH@MAX = 3.135 V 53 55 % VT = 1.5 V (Fig. 8) 183 410 ps VT = 1.5 V (0 OR 180 degrees) 0.43 1 ns VT = 1.5 V (Fig. 8) 157 410 ps 1 Guaranteed by design, not 100% tested in production. 0542G--08/21/03 16 ICS950812 Electrical Characteristics - REF (1X select) TA = 0 - 90C; VDD=3.3V +/-5%; CL = 10-20 pF (unless otherwise specified) PARAMETER Output Frequency Output Impedance SYMBOL FO1 Output High Voltage Output Low Voltage V OH1 VOL1 Output High Current IOH1 Output Low Current IOL1 RDSP11 tr1 1 Fall Time tf1 1 Duty Cycle dt11 Rise Time Jitter tjcyc-cyc CONDITIONS Fig. 8 VO = VDD*(0.5) MIN IOH = -1 mA 2.05 20 TYP 14.32 48 OH@MIN = 1.0 V, V OH@MAX = 3.135 V 70 UNITS MHz V IOL = 1 mA V MAX 0.45 V -29 -25 mA 27 mA VOL @MIN = 1.95 V, VOL @MAX = 0.4 V 25 VOL = 0.4 V, VOH = 2.4 V (Fig. 7) 1 1.1 2.3 ns VOH = 2.4 V, VOL = 0.4 V (Fig. 7) 1 1.4 2.3 ns VT = 1.5 V 45 53 55 % 180 1200 ps TYP 14.32 MAX UNITS MHz 1 VT = 1.5 V (Fig. 8) 1 Guaranteed by design, not 100% tested in production. Electrical Characteristics - REF (2X select) TA = 0 - 90C; VDD=3.3V +/-5%; CL = 20-40 pF (unless otherwise specified) PARAMETER Output Frequency Output Impedance SYMBOL FO1 RDSP11 CONDITIONS Fig. 8 VO = VDD*(0.5) Output High Voltage VOH1 IOH = -1 mA V Output Low Voltage VOL1 IOL = 1 mA V Output High Current IOH1 IOL1 tr11 tf11 dt11 Output Low Current Rise Time Fall Time Duty Cycle Jitter tjcyc-cyc V OH@MIN = 1.0 V, V OH@MAX MIN = 3.135 V mA VOL @MIN = 1.95 V, VOL @MAX = 0.4 V 1 mA VOL = 0.4 V, VOH = 2.4 V (Fig. 7) 1 1.1 2.3 ns VOH = 2.4 V, VOL = 0.4 V (Fig. 7) 1 0.9 2.3 ns VT = 1.5 V 45 53 55 % 180 1200 ps VT = 1.5 V (Fig. 8) 1 Guaranteed by design, not 100% tested in production. 0542G--08/21/03 17 ICS950812 Figure 1 - Differential (CPUCLK - CPUCLK#) Measurement Points (Tperiod, Duty Cycle, Jitter) TPERIOD High Duty Cycle % Low Duty Cycle % 0.000 V Figure 2 - 0.7V Differential TRise and TFall Measurement Points CPUCLK# +0.35V 0.0V -0.35V CPUCLK TRISE TFALL 0542G--08/21/03 18 ICS950812 Figure 3 - 0.7V Single Ended Measurement Points for TRise, TFall TRISE (CPUCLK) V OH = 0.525 CP K UC LK # CL U CP VCROSS V OL = 0.175V TFALL (CPUCLK#) Figure 4 - 0.7V VCross Range Measurement Clarification VCROSS(REL) max Total VCROSS Variation (140mV max) VCROSS(REL) min 0542G--08/21/03 19 ICS950812 Figure 5 - 1.0V Single Ended VCross, VOH and VOL Measurement Points VOH Max 1.45V CPUCLK# VOH Min 0.92V VCROSS Max 0.76V VCROSS Min 0.51V VOL Max 0.35V CPUCLK VOL Min -0.20V Figure 6 - 1.0V Single Ended Measurement Points for TRise, TFall TRISE (CPUCLK) V OH = 0.86V CP K UC LK # CL U CP VCROSS V OL = 0.41V TFALL (CPUCLK#) 0542G--08/21/03 20 ICS950812 Figure 7 - Measurement Points for TRise, TFall with Lumped Load 2.4V 1.5V 0.4V Figure 8 - Measurement Points for TPeriod, Duty Cycle and Jitter TPERIOD High Duty Cycle % Low Duty Cycle % 1.5V 0542G--08/21/03 21 ICS950812 General I2C serial interface information How to Write: How to Read: Controller (host) sends a start bit. Controller (host) sends the write address D2 (H) ICS clock will acknowledge Controller (host) sends the begining byte location = N ICS clock will acknowledge Controller (host) sends the data byte count = X ICS clock will acknowledge Controller (host) starts sending Byte N through Byte N + X -1 (see Note 2) * ICS clock will acknowledge each byte one at a time * Controller (host) sends a Stop bit * * * * * * * * * * * * * * * * * * * * * * Controller (host) will send start bit. Controller (host) sends the write address D2 (H) ICS clock will acknowledge Controller (host) sends the begining byte location = N ICS clock will acknowledge Controller (host) will send a separate start bit. Controller (host) sends the read address D3 (H) ICS clock will acknowledge ICS clock will send the data byte count = X ICS clock sends Byte N + X -1 ICS clock sends Byte 0 through byte X (if X(H) was written to byte 8). Controller (host) will need to acknowledge each byte Controllor (host) will send a not acknowledge bit Controller (host) will send a stop bit Index Block Read Operation Index Block Write Operation Controller (Host) starT bit Slave Address D2(H) WR WRite Controller (Host) T starT bit Slave Address D2(H) WR WRite ICS (Slave/Receiver) T ICS (Slave/Receiver) ACK ACK Beginning Byte = N Beginning Byte = N ACK ACK RT Repeat starT Slave Address D3(H) RD ReaD Data Byte Count = X ACK Beginning Byte N ACK X Byte ACK Data Byte Count = X ACK Beginning Byte N Byte N + X - 1 ACK X Byte ACK P stoP bit Byte N + X - 1 N P 0542G--08/21/03 22 Not acknowledge stoP bit ICS950812 Buffered Mode - 3V66[0:1], 66MHz_IN, 66MHz_OUT[0:2] and PCI Phase Relationship All 3V66 clocks are to be in phase with each other. All 66MHz_OUT clocks are to be in phase with each other. There is NO phase relationship between the 3V66 clocks and the 66MHz_OUT and PCI clocks. In the case where 3V66_1 is configured as 48MHz VCH clock, there is no defined phase relationship between 3V66_1_VCH and other 3V66 clocks. The PCI group should lag 3V66 by the standard skew described below as Tpci. The 66MHz_IN to 66MHz_OUT delay is shown in the figure below and is specified to be within a min and max propagation value. 66MHz_IN Tpd 66MHz_OUT 3V66 No Relationship Tpci PCICLK_F (2:0) PCICLK (6:0) E_PCICLK (3,1) Tepci Group to Group Skews at Common Transition Edges: Buffered Mode GROUP SYMBOL 66MHz_IN 66MHz_OUT1,2 Tpd 66MHz_OUT to PCI 1,2 Tpci CONDITIONS Propogation delay from 66MHz_IN to 66MHz_OUT (2:0) 66MHz_OUT (2:0) leads 33 MHz PCICLK MIN TYP MAX UNITS 2.5 2.9 4.5 ns 3.5 ns 1.5 1 Guaranteed by design, not 100% tested in production. 500ps Tolerance 2 E_PCICLK to PCICLK Skews GROUP SYMBOL TE_PCI-PCI1 E_PCICLK to PCICLK 1 TE_PCI-PCI2 TE_PCI-PCI3 CONDITIONS E_PCICLK1 (pin 11)=0 E_PCICLK3 (pin 13)=1 E_PCICLK1 (pin 11)=1 E_PCICLK3 (pin 13)=0 E_PCICLK1 (pin 11)=1 E_PCICLK3 (pin 13)=1 1 Guaranteed by design, not 100% tested in production. 0542G--08/21/03 23 MIN TYP MAX UNITS 0.3 0.5 0.7 ns 0.8 1.0 1.2 ns 1.3 1.5 1.7 ns ICS950812 Un-Buffered Mode 3V66 & PCI Phase Relationship All 3V66 clocks are to be in pphase with each other. In the case where 3V66_1 is configured as 48MHz VCH clock, there is no defined phase relationship between 3V66_1_VCH and other 3V66 clocks. The PCI group should lag 3V66 by the standard skew described below as Tpci. 3V66 (1:0) 3V66 (4:2) 3V66_5 Tpci PCICLK_F (2:0) PCICLK (6:0) E_PCICLK (3,1) Tepci Group to Group Skews at Common Transition Edges: Unbuffered Mode GROUP 3V66 to PCI1,2 SYMBOL S3V66-PCI CONDITIONS 3V66 (5:0) leads 33MHz PCI MIN 1.5 TYP 2.55 MAX 3.5 UNITS ns MIN TYP MAX UNITS 0.3 0.5 0.7 ns 0.8 1.0 1.2 ns 1.3 1.5 1.7 ns 1 Guarenteed by design, not 100% tested in production. 500ps Tolerance 2 E_PCICLK to PCICLK Skews GROUP SYMBOL TE_PCI-PCI1 E_PCICLK to PCICLK 1 TE_PCI-PCI2 TE_PCI-PCI3 CONDITIONS E_PCICLK1 (pin 11)=0 E_PCICLK3 (pin 13)=1 E_PCICLK1 (pin 11)=1 E_PCICLK3 (pin 13)=0 E_PCICLK1 (pin 11)=1 E_PCICLK3 (pin 13)=1 1 Guaranteed by design, not 100% tested in production. 0542G--08/21/03 24 ICS950812 PCI_STOP# - Assertion (transition from logic "1" to logic "0") The impact of asserting the PCI_STOP# signal will be the following. All PCI[6:0] and stoppable PCI_F[2,0] clocks will latch low in their next high to low transition. The PCI_STOP# setup time tsu is 10 ns, for transitions to be recognized by the next rising edge. Assertion of PCI_STOP# Waveforms PCI_STOP# PCI_F[2:0] 33MHz PCI[6:0] 33MHz tsu CPU_STOP# - Assertion (transition from logic "1" to logic "0") The impact of asserting the CPU_STOP# pin is all CPU outputs that are set in the I2C configuration to be stoppable via assertion of CPU_STOP# are to be stopped after their next transition. When the I2C Bit 6 of Byte 1 is programmed to '0' the final state of the stopped CPU signals is CPU = High and CPU# = Low. There is to be no change to the output drive current values. The CPU will be driven high with a current value equal to (Mult 0 'select') x (Iref), the CPU# signal will not be driven . When the I2C Bit 6 of Byte 1 is programmed to '1' then final state of the stopped CPU signals is Low, both CPU and CPU# outputs will not be driven. Assertion of CPU_STOP# Waveforms CPU_STOP# CPUCLKT CPUCLKC CPU_STOP# Functionality CPU_STOP# CPUT CPUC 1 Normal Normal 0 iref * Mult Float 0542G--08/21/03 25 ICS950812 CPU_STOP# - De-assertion (transition from logic "0" to logic "1") All CPU outputs that were stopped are to resume normal operation in a glitch free manner. The maximum latency from the de-assertion to active outputs is to be defined to be between 2 - 6 CPU clock periods (2 clocks are shown). If the I2C Bit 6 of Byte 1 is programmed to "1" then the stopped CPU outputs will be driven High within 10 nS of CPU_Stop# deassertion. De-assertion of CPU_STOP# Waveforms CPU_STOP# CPUCLKT(2:0) Tdrive_CPU_STOP# <10ns @ 200mV *CPUCLKT(2:0)TS CPUCLKC(2:0) *Signal TS is CPUCLKT in Tri-State mode PD# - Assertion (transition from logic "1" to logic "0") When PWRDWN# is sampled low by two consecutive rising edges of CPU clock, then all clock outputs except CPU clocks must be held low on their next high to low transitions. When the I2C Bit 6 of Byte 0 is programmed to '0' CPU clocks must be held with the CPU clock pin driven high with a value of 2 x Iref, and CPU# undriven. If Bit 6 of Byte 0 is '1' then both CPU and CPU# are undriven. Note the example below shows CPU = 133 MHz and Bit 6 of Byte 0 = '0', this diagram and description is applicable for all valid CPU frequencies 66, 100, 133, 200 MHz. Due to the state if the internal logic, stopping and holding the REF clock outputs in the LOW state may require more than one clock cycle to complete. Power Down Assertion of Waveforms 25ns 0ns 50ns PD# CPUCLKT 100MHz CPUCLKC 100MHz 3V66MHz 66MHz_IN 66MHz_OUT PCICLK 33MHz USB 48MHz REF 14.318MHz PD# Functionality PD# CPUCLKT CPUCLKC 3V66 66MHz_OUT PCICLK_F PCICLK PCICLK USB/DOT 48MHz 1 Normal Normal 66MHz 66MHz_IN 66MHz_IN/2 66MHz_IN/2 48MHz 0 iref * Mult Float Low Low Low Low Low 0542G--08/21/03 26 ICS950812 Power Down De-Assertion Mode The power-up latency needs to be less than 1.8mS. this is the time from the de-asseration of the powerdown of the ramping of the power supply until the time that stable clocks are output from the clock chip. If the I2C Bit 6 of Byte 0 is programmed to "1" then the stopped CPU outputs will be driven high within 3 nS of PD# de-asseration. Test Configuration Diagrams Rs=33 Ohms 1% TLA Rdif=475 Ohms 1% CLK408 CPUCLKT test point Rs=33 Ohms 1% TLB Rp=63.4 Ohms 1% CPUCLKC test point Rp=63.4 Ohms 1% 2pF 5% RREF=221 Ohms 1% 2pF 5% MULTSEL Pin must be Low CPU 1.0V Configuration test load board termination Rs=33 Ohms 5% TLA CLK408 CPUCLKT test point Rs=33 Ohms 5% TLB Rp=49.9 Ohms 1% CPUCLKC test point Rp=49.9 Ohms 1% Rset=475 Ohms 1% 2pF 5% 2pF 5% MULTSEL Pin must be High CPU 0.7V Configuration test load board termination 0542G--08/21/03 27 ICS950812 c N L E1 INDEX AREA E 1 2 h x 45 D A A1 -Ce SEATING PLANE b In Millimeters SYMBOL COMMON DIMENSIONS MIN MAX A 2.41 2.80 A1 0.20 0.40 b 0.20 0.34 c 0.13 0.25 SEE VARIATIONS D E 10.03 10.68 E1 7.40 7.60 0.635 BASIC e h 0.38 0.64 L 0.50 1.02 SEE VARIATIONS N 0 8 In Inches COMMON DIMENSIONS MIN MAX .095 .110 .008 .016 .008 .0135 .005 .010 SEE VARIATIONS .395 .420 .291 .299 0.025 BASIC .015 .025 .020 .040 SEE VARIATIONS 0 8 VARIATIONS N .10 (.004) C 56 D mm. MIN 18.31 D (inch) MAX 18.55 MIN .720 Reference Doc.: JEDEC Publicat ion 95, M O-118 300 mil SSOP Package 10-0034 Ordering Information ICS950812yFLFT Example: ICS XXXX y F LF T Designation for tape and reel packaging Lead Free (optional) Package Type F = SSOP Revision Designator (will not correlate with datasheet revision) Device Type (consists of 3 or 4 digit numbers) Prefix ICS, AV = Standard Device 0542G--08/21/03 28 MAX .730 ICS950812 c N In Millimeters In Inches SYMBOL COMMON DIMENSIONS COMMON DIMENSIONS MIN MAX MIN MAX A -1.20 -.047 A1 0.05 0.15 .002 .006 A2 0.80 1.05 .032 .041 b 0.17 0.27 .007 .011 c 0.09 0.20 .0035 .008 SEE VARIATIONS SEE VARIATIONS D 8.10 BASIC 0.319 BASIC E E1 6.00 6.20 .236 .244 0.50 BASIC 0.020 BASIC e L 0.45 0.75 .018 .030 SEE VARIATIONS SEE VARIATIONS N 0 8 0 8 aaa -0.10 -.004 L E1 INDEX AREA E 1 2 D A A2 A1 -Ce VARIATIONS SEATING PLANE b N aaa C 56 D mm. MIN MAX 13.90 14.10 D (inch) MIN .547 Reference Doc.: JEDEC Publicat ion 95, M O-153 6.10 mm. Body, 0.50 mm. pitch TSSOP (20 mil) (240 mil) 10-0039 Ordering Information ICS950812yGLFT Example: ICS XXXX y G LF T Designation for tape and reel packaging Lead Free (optional) Package Type G = TSSOP Revision Designator (will not correlate with datasheet revision) Device Type (consists of 3 or 4 digit numbers) Prefix ICS, AV = Standard Device 0542G--08/21/03 29 MAX .555