951464AGLF

ICS951464 IDT | Alldatasheet

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IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 Programmable System Clock Chip for ATI RS/RD690 K8TM - based Systems Recommended Application: ATI RS/RD690 systems using AMD K8 processors & SB600 Southbridge Output Features:

2 - 0.7V current-mode differential CPU pairs 6 - 0.7V current-mode differential SRC pairs 2 - 0.7V current-mode differential ATIG pairs 1 - HyperTransport clock seed 2 - 48MHz USB clock 3 - 14.318MHz Reference clock Pin Configuration Key Specifications: CPU outputs cycle-to-cycle jitter < 85ps SRC outputs cycle-to-cycle jitter < 125ps ATIG outputs cycle-to-cycle jitter < 125ps +/- 300ppm frequency accuracy on CPU, SRC & ATIG clocks Features/Benefits: 3 - Programmable Clock Request pins for SRC and ATIG clocks ATIGCLKs are programmable for frequency Spread Spectrum for EMI reduction Outputs may be disabled via SMBus External crystal load capacitors for maximum frequency accuracy GNDREF 1 56 FS0/REF0 VDDREF 2 55 FS1/REF1 X1 3 54 FS2/REF2 X2 4 53 **PD VDD48 5 52 VDDHTT 48MHz_0 6 51 HTTCLK0 48MHz_1 7 50 GNDHTT GND48 8 49 *CLKREQA# SMBCLK 9 48 CPUCLK8T0 SMBDAT 10 47 CPUCLK8C0 RESET_IN# 11 46 VDDCPU SRCCLKT7 12 45 GNDCPU SRCCLKC7 13 44 CPUCLK8T1 VDDSRC 14 43 CPUCLK8C1 GNDSRC 15 42 VDDA SRCCLKT6 16 41 GNDA SRCCLKC6 17 40 IREF SRCCLKT5 18 39 SRCCLKT0 SRCCLKC5 19 38 SRCCLKC0 SRCCLKT4 20 37 GNDSRC SRCCLKC4 21 36 VDDSRC GNDSRC 22 35 ATIGCLKT0 VDDSRC 23 34 ATIGCLKC0 SRCCLKT2 24 33 VDDATIG SRCCLKC2 25 32 GNDATIG VDDSRC 26 31 ATIGCLKT1 GNDSRC 27 30 ATIGCLKC1 *CLKREQB# 28 29 *CLKREQC# 56-Pin SSOP/TSSOP Note: Pins preceeded by * have a 120 Kohm Internal Pull Up resistor Pins preceeded by ** have a 120 Kohm Internal Pull Down resistor 951464AGLF

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems Pin Description PIN # PIN NAME TYPE DESCRIPTION 1 GNDREF PWR Ground pin for the REF outputs. 2 VDDREF PWR Ref, XTAL power supply, nominal 3.3V 3 X1 IN Crystal input, Nominally 14.318MHz. 4 X2 OUT Crystal output, Nominally 14.318MHz 5 VDD48 PWR Power pin for the 48MHz output.3.3V 6 48MHz_0 OUT 48MHz clock output. 7 48MHz_1 OUT 48MHz clock output.

8 GND48 PWR Ground pin for the 48MHz outputs

9 SMBCLK IN Clock pin of SMBUS circuitry, 5V tolerant

10 SMBDAT I/O Data pin of SMBUS circuitry, 5V tolerant

11 RESET_IN# IN Real time active low input. When active, SMBus is reset to power up default. 12 SRCCLKT7 OUT True clock of differential SRC clock pair. 13 SRCCLKC7 OUT Complement clock of differential SRC clock pair. 14 VDDSRC PWR Supply for SRC clo cks, 3.3V nominal

15 GNDSRC PWR Ground pin for the SRC outputs

16 SRCCLKT6 OUT True clock of differential SRC clock pair. 17 SRCCLKC6 OUT Complement clock of differential SRC clock pair. 18 SRCCLKT5 OUT True clock of differential SRC clock pair. 19 SRCCLKC5 OUT Complement clock of differential SRC clock pair. 20 SRCCLKT4 OUT True clock of differential SRC clock pair. 21 SRCCLKC4 OUT Complement clock of differential SRC clock pair.

22 GNDSRC PWR Ground pin for the SRC outputs

23 VDDSRC PWR Supply for SRC clo cks, 3.3V nominal 24 SRCCLKT2 OUT True clock of differential SRC clock pair. 25 SRCCLKC2 OUT Complement clock of differential SRC clock pair. 26 VDDSRC PWR Supply for SRC clo cks, 3.3V nominal

27 GNDSRC PWR Ground pin for the SRC outputs

28 *CLKREQB# IN Output enable for PCI Express (SRC) outputs. SMBus selects which outputs are controlled. 0 = enabled, 1 = tri-stated

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems Pin Description (Continued) PIN # PIN NAME TYPE DESCRIPTION 29 *CLKREQC# IN Output enable for PCI Express (SRC) outputs. SMBus selects which outputs are controlled. 0 = enabled, 1 = tri-stated 30 ATIGCLKC1 OUT Complementary clock of differential ATIGCLK clock pair. 31 ATIGCLKT1 OUT True clock of differential ATIGCLK clock pair.

32 GNDATIG PWR Ground for ATIG clocks

33 VDDATIG PWR Power supply ATIG clo cks, nominal 3.3V 34 ATIGCLKC0 OUT Complementary clock of differential ATIGCLK clock pair. 35 ATIGCLKT0 OUT True clock of differential ATIGCLK clock pair. 36 VDDSRC PWR Supply for SRC clo cks, 3.3V nominal

37 GNDSRC PWR Ground pin for the SRC outputs

38 SRCCLKC0 OUT Complement clock of differential SRC clock pair. 39 SRCCLKT0 OUT True clock of differential SRC clock pair.

40 IREF OUT

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. 41 GNDA PWR Ground pin for the PLL core. 42 VDDA PWR 3.3V power for the PLL core. 43 CPUCLK8C1 OUT Complementary clock of differential 3.3V push-pull K8 pair. 44 CPUCLK8T1 OUT True clock of differential 3.3V push-pull K8 pair.

45 GNDCPU PWR Ground pin for the CPU outputs

46 VDDCPU PWR Supply for CPU clo cks, 3.3V nominal 47 CPUCLK8C0 OUT Complementary clock of differential 3.3V push-pull K8 pair. 48 CPUCLK8T0 OUT True clock of differential 3.3V push-pull K8 pair. 49 *CLKREQA# IN Output enable for PCI Express (SRC) outputs. SMBus selects which outputs are controlled. 0 = enabled, 1 = tri-stated

50 GNDHTT PWR Ground pin for the HTT outputs

51 HTTCLK0 OUT 3.3V Hyper Transport output 52 VDDHTT PWR Supply for HTT clo cks, nominal 3.3V. 53 **PD IN Asynchronous active high input pin used to power down the device. The internal clocks are disabled and the VCO is sto pped. 54 FS2/REF2 I/O Frequency select latch input pin / 14.318 MHz reference clock. 55 FS1/REF1 I/O Frequency select latch input pin / 14.318 MHz reference clock. 56 FS0/REF0 I/O Frequency select latch input pin / 14.318 MHz reference clock.

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems General Description Block Diagram The ICS951464 is a main clock synthesizer chip that provides all clocks required for ATI RS/RD690-based systems. An SMBus interface allows full control of the device. Programmable Spread PLLsControl Logic Xtal Osc. Fixed PLL 48MHz(1:0) REF(2:0) CPUCLK(2:0) Programmable Dividers CLKREQA# SMBDAT SMBCLK FS(2:0) CLKREQB# ATIGCLK(2:0) SRCCLK(7:0) CLKREQC# RESET_IN# IREF HTTCLK0

951464 Power Group Table

VDD Pin# GND Pin# Description 2 1 Crsytal, REF VDD & VSS I/O & Core 5 8 48M Core and Output; FIX PLL Analog/Digital 14,26 15,27 SRC I/O & Core 23 22 SRC I/O & Core; SRC PLL Digital 36 37 SRC I/O & Core; SRC PLL Analog 33 32 ATIG I/O & Core; ATIG PLL Analog/Digital 42 41 CPU PLL Analog 46 45 CPU I/O & Core; CPU PLL Digital 52 50 HTT I/O & Core

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems Table1: CPU and HTT Frequency Selection Table Bit4 Bit3 Bit2 Bit1 Bit0 CPU SS_EN CPU FS3 CPU FS2 CPU FS1 CPU FS0 0 0 0 0 0 Hi-Z Hi-Z None 0 0 0 0 1 X / 2 X / 3 None 0 0 0 1 0 230.00 76.67 None 15% 0 0 0 1 1 240.00 80.00 None 20% 0 0 1 0 0 100.00 66.67 None 0 0 1 0 1 133.33 66.67 None 0 0 1 1 0 166.67 66.67 None 0 0 1 1 1 200.00 66.67 None 0 1 0 0 0 250.00 83.33 None 25% 0 1 0 0 1 260.00 86.67 None 30% 0 1 0 1 0 270.00 90.00 None 35% 0 1 0 1 1 280.00 93.33 None 40% 0 1 1 0 0 102.00 68.00 None 0 1 1 0 1 136.00 68.00 None 0 1 1 1 0 170.00 68.00 None 0 1 1 1 1 204.00 68.00 None 1 0 0 0 0 210.00 70.00 -0.5% 5% 1 0 0 0 1 220.00 73.33 -0.5% 10% 1 0 0 1 0 230.00 76.67 -0.5% 15% 1 0 0 1 1 240.00 80.00 -0.5% 20% 1 0 1 0 0 100.00 66.67 -0.5% 1 0 1 0 1 133.33 66.67 -0.5% 1 0 1 1 0 166.67 66.67 -0.5% 1 0 1 1 1 200.00 66.67 -0.5% 1 1 0 0 0 250.00 83.33 -0.5% 25% 1 1 0 0 1 260.00 86.67 -0.5% 30% 1 1 0 1 0 270.00 90.00 -0.5% 35% 1 1 0 1 1 280.00 93.33 -0.5% 40% 1 1 1 0 0 102.00 68.00 -0.5% 1 1 1 0 1 136.00 68.00 -0.5% 1 1 1 1 0 170.00 68.00 -0.5% 1 1 1 1 1 204.00 68.00 -0.5% Byte 0 CPUCLK (2:0) (MHz) Spread Overclock HTT (MHz)

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems Table2: SRC Frequency Selection Table Bit3 Bit2 Bit1 Bit0 SRC SS_EN SRC FS3 SRC FS2 SRC FS1 SRC FS0 0 0000 1 0 0 . 0 0 0 0% 0 0001 1 0 1 . 0 0 0 1% 0 0010 1 0 2 . 0 0 0 2% 0 0011 1 0 3 . 0 0 0 3% 0 0100 1 0 4 . 0 0 0 4% 0 0101 1 0 5 . 0 0 0 5% 0 0110 1 0 6 . 0 0 0 6% 0 0111 1 0 7 . 0 0 0 7% 0 1000 1 0 0 . 0 0 0 0% 0 1001 1 0 1 . 0 0 0 1% 0 1010 1 0 2 . 0 0 0 2% 0 1011 1 0 3 . 0 0 0 3% 0 1100 1 0 4 . 0 0 0 4% 0 1101 1 0 5 . 0 0 0 5% 0 1110 1 0 6 . 0 0 0 6% 0 1111 1 0 7 . 0 0 0 7% 1 0000 1 0 0 . 0 0 -0.25% 0% 1 0001 1 0 1 . 0 0 -0.25% 1% 1 0010 1 0 2 . 0 0 -0.25% 2% 1 0011 1 0 3 . 0 0 -0.25% 3% 1 0100 1 0 4 . 0 0 -0.25% 4% 1 0101 1 0 5 . 0 0 -0.25% 5% 1 0110 1 0 6 . 0 0 -0.25% 6% 1 0111 1 0 7 . 0 0 -0.25% 7% 1 1000 1 0 0 . 0 0 -0.5% 0% 1 1001 1 0 1 . 0 0 -0.5% 1% 1 1010 1 0 2 . 0 0 -0.5% 2% 1 1011 1 0 3 . 0 0 -0.5% 3% 1 1100 1 0 4 . 0 0 -0.5% 4% 1 1101 1 0 5 . 0 0 -0.5% 5% 1 1110 1 0 6 . 0 0 -0.5% 6% 1 1111 1 0 7 . 0 0 -0.5% 7% Byte 0 Bit 5 Spread SRC OverClock SRC (MHz) Byte 5

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems Table3: ATIG Frequency Selection Table Bit4 Bit3 Bit1 Bit0 ATIG SS_EN ATIG FS3 ATIG FS2 ATIG FS1 ATIG FS0 0 0000 1 0 0 . 0 0 0 0% 0 0001 1 0 5 . 0 0 0 5% 0 0010 1 1 0 . 0 0 0 10% 0 0011 1 1 5 . 0 0 0 15% 0 0100 1 2 0 . 0 0 0 20% 0 0101 1 2 5 . 0 0 0 25% 0 0110 1 3 0 . 0 0 0 30% 0 0111 1 3 5 . 0 0 0 35% 0 1000 1 0 0 . 0 0 0 0% 0 1001 1 0 5 . 0 0 0 5% 0 1010 1 1 0 . 0 0 0 10% 0 1011 1 1 5 . 0 0 0 15% 0 1100 1 2 0 . 0 0 0 20% 0 1101 1 2 5 . 0 0 0 25% 0 1110 1 3 0 . 0 0 0 30% 0 1111 1 3 5 . 0 0 0 35% 1 0000 1 0 0 . 0 0 -0.25% 0% 1 0001 1 0 5 . 0 0 -0.25% 5% 1 0010 1 1 0 . 0 0 -0.25% 10% 1 0011 1 1 5 . 0 0 -0.25% 15% 1 0100 1 2 0 . 0 0 -0.25% 20% 1 0101 1 2 5 . 0 0 -0.25% 25% 1 0110 1 3 0 . 0 0 -0.25% 30% 1 0111 1 3 5 . 0 0 -0.25% 35% 1 1000 1 0 0 . 0 0 -0.5% 0% 1 1001 1 0 5 . 0 0 -0.5% 5% 1 1010 1 1 0 . 0 0 -0.5% 10% 1 1011 1 1 5 . 0 0 -0.5% 15% 1 1100 1 2 0 . 0 0 -0.5% 20% 1 1101 1 2 5 . 0 0 -0.5% 25% 1 1110 1 3 0 . 0 0 -0.5% 30% 1 1111 1 3 5 . 0 0 -0.5% 35% Byte 0 Bit 6 ATIG (MHz) Spread ATIG OverClock Byte 9

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems Table 4: CPU Divider Ratios B19b(7:4) Bit 00 01 10 11 MSB 00 0000 2 0100 4 1000 8 1100 16 01 0001 3 0101 6 1001 12 1101 24 10 0010 5 0110 10 1010 20 1110 40 11 0011 15 0111 30 1011 60 1111 120 LSB Address Div Address Address Div Address Div Table 5: HTT Divider Ratios B20b(3:0) Bit 00 01 10 11 MSB 00 0000 4 0100 8 1000 16 1100 32 01 0001 3 0101 6 1001 12 1101 24 10 0010 5 0110 10 1010 20 1110 40 11 0011 15 0111 30 1011 60 1111 120 LSB Address Div Address Address Div Address Div Table 6: ATIG Divider Ratios B19b(3:0) Bit 00 01 10 11 MSB 00 0000 2 0100 4 1000 8 1100 16 01 0001 3 0101 6 1001 12 1101 24 10 0010 5 0110 10 1010 20 1110 40 11 0011 7 0111 14 1011 28 1111 56 LSB Address Div Address Address Div Address Div Divider (1:0) Divider (3:2) Divider (3:2) Divider (1:0) Divider (3:2) Divider (1:0)

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 ICS clock will acknowledge each byte one at a time Controller (host) sends a Stop bit How to Read: 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 ICS (Slave/Receiver) T WR ACK ACK ACK ACK ACK P stoP bit X Byte Index Block Write Operation Slave Address D2(H) Beginning Byte = N WRite starT bit Controller (Host) Byte N + X - 1 Data Byte Count = X Beginning Byte N T starT bit WR WRite RT Repeat starT RD ReaD Beginning Byte N Byte N + X - 1 N Not acknowledge Ps t o P b i t Slave Address D3(H) Index Block Read Operation Slave Address D2(H) Beginning Byte = N ACK ACK Data Byte Count = X ACK ICS (Slave/Receiver)Controller (Host) X Byte ACK ACK

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems SMBus Table: Spread Spectrum Enable and CPU Frequency Select Register Byte 0 Pin # Name Control Function Type 0 1 PWD Bit 7 - FS Source Latched Input or SMBus Frequency Select RW Latched Inputs SMBus 0 Bit 6 - ATIG SS_EN ATIG Spread Spectrum Enable RW Disable Enable 0 Bit 5 - SRC SS_EN SRC Spread Spectrum Enable RW Disable Enable 0 Bit 4 - CPU SS_EN CPU Spread Spectrum Enable RW Disable Enable 0 Bit 3 - CPU FS3 CPU Freq Select Bit 3 RW 0 Bit 2 - CPU FS2 CPU Freq Select Bit 2 RW Latch Bit 1 - CPU FS1 CPU Freq Select Bit 1 RW Latch Bit 0 - CPU FS0 CPU Freq Select Bit 0 RW Latch Note: Each Spread Spectrum Enable bit is independent from the other. Bit(6:4) must all set to "1" in order to enable spread for CPU, SRC and ATIG clocks. SMBus Table: Output Control Register Byte 1 Pin # Name Control Function Type 0 1 PWD Bit 7 7 48MHz_1 48MHz_1 Output Enable RW Disable Enable 1 Bit 6 6 48MHz_0 48MHz_0 Output Enable RW Disable Enable 1 Bit 5 54 REF2 REF2 Output Enable RW Disable Enable 1 Bit 4 55 REF1 REF1 Output Enable RW Disable Enable 1 Bit 3 56 REF0 REF0 Output Enable RW Disable Enable 1 Bit 2 51 HTTCLK0 HTTCLK0 Output Enable RW Disable Enable 1 Bit 1 44,43 CPUCLK1 CPUCLK1 Output Enable RW Disable Enable 1 Bit 0 48,47 CPUCLK0 CPUCLK0 Output Enable RW Disable Enable 1 SMBus Table: ATIGCLK and CLKREQB# Output Control Register Byte 2 Pin # Name Control Function Type 0 1 PWD Bit 7 1 Bit 6 1 Bit 5 31,30 ATIGCLK1 ATIGCLK1 Output Enable RW Disable Enable 1 Bit 4 35,34 ATIGCLK0 ATIGCLK0 Output Enable RW Disable Enable 1 Bit 3 20,21 REQBSRC4 CLKREQB# Controls SRC4 RW Does not control Controls 0 Bit 2 0 Bit 1 24,25 REQBSRC2 CLKREQB# Controls SRC2 RW Does not control Controls 0 Bit 0 0 SMBus Table: SRCCLK Output Control Register Byte 3 Pin # Name Control Function Type 0 1 PWD Bit 7 12,13 SRCCLK7 RW Disable Enable 1 Bit 6 16,17 SRCCLK6 RW Disable Enable 1 Bit 5 18,19 SRCCLK5 RW Disable Enable 1 Bit 4 20,21 SRCCLK4 RW Disable Enable 1 Bit 3 1 Bit 2 24,25 SRCCLK2 RW Disable Enable 1 Bit 1 1 Bit 0 39,38 SRCCLK0 RW Disable Enable 1 See Table 1: CPU Frequency Selection Table Master Output control. Enables or disables output, regardless of CLKREQ# inputs. Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems SMBus Table: CLKREQA# and CLKREQC# Output Control Register Byte 4 Pin # Name Control Function Type 0 1 PWD Bit 7 12,13 REQASRC7 CLKREQA# Controls SRC7 RW Does not control Controls 0 Bit 6 16,17 REQASRC6 CLKREQA# Controls SRC6 RW Does not control Controls 0 Bit 5 18,19 REQASRC5 CLKREQA# Controls SRC5 RW Does not control Controls 0 Bit 4 0 Bit 3 0 Bit 2 31,30 REQCATIG1 CLKREQC# Controls ATIG1 RW Does not control Controls 0 Bit 1 35,34 REQCATIG0 CLKREQC# Controls ATIG0 RW Does not control Controls 0 Bit 0 39,38 REQCSRC0 CLKREQC# Controls SRC0 RW Does not control Controls 0 SMBus Table: CPU Stop Control and SRC Frequency Select Register Byte 5 Pin # Name Control Function Type 0 1 PWD Bit 7 0 Bit 6 0 Bit 5 0 Bit 4 SRC, ATIG Differential Output Disable Mode Hi-Z or Driven when disable RW Driven Hi-Z 0 Bit 3 - SRC FS3 SRC Freq Select Bit 3 RW 0 Bit 2 - SRC FS2 SRC Freq Select Bit 2 RW 0 Bit 1 - SRC FS1 SRC Freq Select Bit 1 RW 0 Bit 0 - SRC FS0 SRC Freq Select Bit 0 RW 0 SMBus Table: Device ID Register Byte 6 Pin # Name Control Function Type 0 1 PWD Bit 7 - Device ID7 (MSB) R - - 0 Bit 6 - Device ID6 R - - 1 Bit 5 - Device ID5 R - - 1 Bit 4 - Device ID4 R - - 0 Bit 3 - Device ID3 R - - 0 Bit 2 - Device ID2 R - - 0 Bit 1 - Device ID1 R - - 1 Bit 0 - Device ID0 (LSB) R - - 0 SMBus Table: Revision and Vendor ID Register Byte 7 Pin # Name Control Function Type 0 1 PWD Bit 7 -R I D 3 R - - x Bit 6 -R I D 2 R - - x Bit 5 -R I D 1 R - - x Bit 4 -R I D 0 R - - x Bit 3 -V I D 3 R - - 0 Bit 2 -V I D 2 R - - 0 Bit 1 -V I D 1 R - - 0 Bit 0 -V I D 0 R - - 1 Reserved See Table 2: SRC Frequency Selection Table DEVICE ID REVISION ID Reserved Reserved VENDOR ID Reserved Reserved

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems SMBus Table: Byte Count Register Byte 8 Pin # Name Control Function Type 0 1 PWD Bit 7 - BC7 RW 0 Bit 6 - BC6 RW 0 Bit 5 - BC5 RW 0 Bit 4 - BC4 RW 0 Bit 3 - BC3 RW 1 Bit 2 - BC2 RW 0 Bit 1 - BC1 RW 0 Bit 0 - BC0 RW 1 SMBus Table: REF2, 48MHz Output Strength Control and ATIG Frequency Select Register Byte 9 Pin # Name Control Function Type 0 1 PWD Bit 7 54 REF2Str REF2 Strength Control RW 1X 2X 1 Bit 6 7 48MHz_1Str 48MHz_1 Strength Control RW 1X 2X 1 Bit 5 6 48MHz_0Str 48MHz_0 Strength Control RW 1X 2X 1 Bit 4 0 Bit 3 - ATIG FS3 ATIG Freq Select Bit 3 RW 0 Bit 2 - ATIG FS2 ATIG Freq Select Bit 2 RW 0 Bit 1 - ATIG FS1 ATIG Freq Select Bit 1 RW 0 Bit 0 - ATIG FS0 ATIG Freq Select Bit 0 RW 0 SMBus Table: PLLs M/N Programming Enable and REF1, REF0 Output Strength Control Register Byte 10 Pin # Name Control Function Type 0 1 PWD Bit 7 - M/N_EN PLLs M/N Programming Enable RW Disable Enable 0 Bit 6 55 REF1Str REF1 Strength Control RW 1X 2X 1 Bit 5 56 REF0Str REF0 Strength Control RW 1X 2X 1 Bit 4 0 Bit 3 0 Bit 2 0 Bit 1 0 Bit 0 0 SMBus Table: CPU PLL VCO Frequency Control Register Byte 11 Pin # Name Control Function Type 0 1 PWD Bit 7 - N Div8 N Divider Prog bit 8 RW X Bit 6 - N Div 9 N Divider Prog bit 9 RW X Bit 5 - M Div5 RW X Bit 4 - M Div4 RW X Bit 3 - M Div3 RW X Bit 2 - M Div2 RW X Bit 1 - M Div1 RW X Bit 0 - M Div0 RW X SMBus Table: CPU PLL VCO Frequency Control Register Byte 12 Pin # Name Control Function Type 0 1 PWD Bit 7 - N Div7 RW X Bit 6 - N Div6 RW X Bit 5 - N Div5 RW X Bit 4 - N Div4 RW X Bit 3 - N Div3 RW X Bit 2 - N Div2 RW X Bit 1 - N Div1 RW X Bit 0 - N Div0 RW X N Divider Programming b(7:0) The decimal representation of M and N Divier in Byte 11 and 12 will configure the VCO frequency. Default at power up = latch-in or Byte 0 Rom table. VCO Frequency = [MDiv(5:0)+2] Reserved Reserved Byte Count Programming b(7:0) Writing to this register will congiure how many bytes will be read back, default is 9 bytes. See Table 3: ATIG Frequency Selection Table Reserved Reserved Reserved Reserved The decimal representation of M and N Divier in Byte 11 and 12 will configure the VCO frequency. Default at power up = latch-in or Byte 0 Rom table. VCO Frequency = [MDiv(5:0)+2] M Divider Programming bits

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems SMBus Table: CPU PLL Spread Spectrum Control Register Byte 13 Pin # Name Control Function Type 0 1 PWD Bit 7 - SSP7 RW X Bit 6 - SSP6 RW X Bit 5 - SSP5 RW X Bit 4 - SSP4 RW X Bit 3 - SSP3 RW X Bit 2 - SSP2 RW X Bit 1 - SSP1 RW X Bit 0 - SSP0 RW X SMBus Table: CPU PLL Spread Spectrum Control Register Byte 14 Pin # Name Control Function Type 0 1 PWD Bit 7 0 Bit 6 - SSP14 RW X Bit 5 - SSP13 RW X Bit 4 - SSP12 RW X Bit 3 - SSP11 RW X Bit 2 - SSP10 RW X Bit 1 - SSP9 RW X Bit 0 - SSP8 RW X SMBus Table: ATIG PLL VCO Frequency Control Register Byte 15 Pin # Name Control Function Type 0 1 PWD Bit 7 - N Div8 N Divider Prog bit 8 RW X Bit 6 - N Div9 N Divider Prog bit 9 RW X Bit 5 - M Div5 RW X Bit 4 - M Div4 RW X Bit 3 - M Div3 RW X Bit 2 - M Div2 RW X Bit 1 - M Div1 RW X Bit 0 - M Div0 RW X SMBus Table: ATIG PLL VCO Frequency Control Register Byte 16 Pin # Name Control Function Type 0 1 PWD Bit 7 - N Div7 RW X Bit 6 - N Div6 RW X Bit 5 - N Div5 RW X Bit 4 - N Div4 RW X Bit 3 - N Div3 RW X Bit 2 - N Div2 RW X Bit 1 - N Div1 RW X Bit 0 - N Div0 RW X SMBus Table: ATIG PLL Spread Spectrum Control Register Byte 17 Pin # Name Control Function Type 0 1 PWD Bit 7 - SSP7 RW X Bit 6 - SSP6 RW X Bit 5 - SSP5 RW X Bit 4 - SSP4 RW X Bit 3 - SSP3 RW X Bit 2 - SSP2 RW X Bit 1 - SSP1 RW X Bit 0 - SSP0 RW X Spread Spectrum Programming b(7:0) Spread Spectrum Programming b(14:8) These Spread Spectrum bits in Byte 13 and 14 will program the spread pecentage. It is recommended to use ICS Spread % table for spread programming. The decimal representation of M and N Divier in Byte 17 and 18 will configure the VCO frequency. Default at power up = Byte 0 Rom table. VCO Frequency = 14.318 x [NDiv(9:0)+8] / [MDiv(5:0)+2] M Divider Programming bits N Divider Programming b(7:0) These Spread Spectrum bits in Byte 13 and 14 will program the spread pecentage. It is recommended to use ICS Spread % table for spread programming. Reserved The decimal representation of M and N Divier in Byte 17 and 18 will configure the VCO frequency. Default at power up = Byte 0 Rom table. VCO Frequency = 14.318 x [NDiv(9:0)+8] / [MDiv(5:0)+2] Spread Spectrum Programming b(7:0) These Spread Spectrum bits in Byte 19 and 20 will program the spread pecentage. It is recommended to use ICS Spread % table for spread programming.

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems SMBus Table: ATIG PLL Spread Spectrum Control Register Byte 18 Pin # Name Control Function Type 0 1 PWD Bit 7 0 Bit 6 - SSP14 RW X Bit 5 - SSP13 RW X Bit 4 - SSP12 RW X Bit 3 - SSP11 RW X Bit 2 - SSP10 RW X Bit 1 - SSP9 RW X Bit 0 - SSP8 RW X SMBus Table: CPU and ATIG Divider Ratio Programming Bits Select Register Byte 19 Pin # Name Control Function Type 0 1 PWD Bit 7 -C P U _ D i v 3 R W X Bit 6 -C P U _ D i v 2 R W X Bit 5 -C P U _ D i v 1 R W X Bit 4 -C P U _ D i v 0 R W X Bit 3 - ATIG_Div3 RW X Bit 2 - ATIG_Div2 RW X Bit 1 - ATIG_Div1 RW X Bit 0 - ATIG_Div0 RW X SMBus Table: HTT Divider Ratio Programming Bits Select Register Byte 20 Pin # Name Control Function Type 0 1 PWD Bit 7 0 Bit 6 0 Bit 5 0 Bit 4 0 Bit 3 - HTT_Div3 RW X Bit 2 - HTT_Div2 RW X Bit 1 - HTT_Div1 RW X Bit 0 - HTT_Div0 RW X Reserved See Table 5: ATIG Divider Ratios Reserved Spread Spectrum Programming b(14:8) These Spread Spectrum bits in Byte 19 and 20 will program the spread pecentage. It is recommended to use ICS Spread % table for spread programming. CPU_Divider Ratio Programming Bits HTT_Divider Ratio Programming Bits See Table 6: HTT Divider Ratios Reserved See Table 4: CPU Divider Ratios ATIG_Divider Ratio Programming Bits Reserved Reserved

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems Absolute Max PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Notes 3.3V Core Supply Voltage VDD_A - VDD + 0.5V V 1 3.3V Logic Input Supply Voltage VDD_In - GND - 0.5 VDD + 0.5V V 1 Storage Temperature Ts - -65 150 °C 1 Ambient Operating Temp Tambient - 07 0 ° C 1 Case Temperature Tcase - 115 °C 1 Input ESD protection HBM ESD prot - 2000 V 1 1Guaranteed by design and characterization, not 100% tested in production. Electrical Characteristics - Input/Supply/Common Output Parameters PARAMETER SYMBOL CONDITIONS* MIN TYP MAX UNITS Notes Input High Voltage V IH 3.3 V +/-5% 2 V DD + 0.3 V 1 Input Low Voltage V IL 3.3 V +/-5% V SS - 0.3 0.8 V 1 Input High Current I IH VIN = VDD -5 5 uA 1 IIL1 VIN = 0 V; Inputs with no pull-up resistors -5 uA 1 IIL2 VIN = 0 V; Inputs with pull-up resistors -200 uA 1 Low Threshold Input- High Voltage VIH_FS 3.3 V +/-5% 0.7 V DD + 0.3 V 1 Low Threshold Input- Low Voltage VIL_FS 3.3 V +/-5% V SS - 0.3 0.35 V 1 Operating Current I DD3.3OP all outputs driven 400 mA 1 all diff pairs driven 70 mA 1 all differential pairs tri-stated 12 mA 1 Input Frequency F i VDD = 3.3 V 14.31818 MHz 2 Pin Inductance L pin 7n H 1 CIN Logic Inputs 5 pF 1 COUT Output pin capacitance 6 pF 1 CINX X1 & X2 pins 5 pF 1 Clk Stabilization T STAB From VDD Power-Up or de- assertion of PD to 1st clock 1.8 ms 1 Modulation Frequency Triangular Modulation 30 33 kHz 1 Tdrive_PD CPU output enable after PD de-assertion 300 us 1 Tfall_PD PD fall time of 5 ns 1 Trise_PD PD rise time of 5 ns 1 SMBus Voltage V DD 2.7 5.5 V 1 Low-level Output Voltage V OL @ IPULLUP 0.4 V 1 Current sinking at VOL = 0.4 V IPULLUP 4m A 1 SMBCLK/SMBDAT Clock/Data Rise Time TRI2C (Max VIL - 0.15) to (Min VIH + 0.15) 1000 ns 1 SMBCLK/SMBDAT Clock/Data Fall Time TFI2C (Min VIH + 0.15) to (Max VIL - 0.15) 300 ns 1 *TA = 0 - 70°C; Supply Voltage VDD = 3.3 V +/-5% 1Guaranteed by design and characterization, not 100% tested in production. Input Low Current Powerdown Current I DD3.3PD Input Capacitance 2 Input frequency should be measured at the REF pin and tuned to ideal 14.31818MHz to meet ppm frequency accuracy on PLL outputs.

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems Electrical Characteristics - K8 Push Pull Differential Pair TA = 0 - 70°C; VDD = 3.3 V +/-5%; CL =AMD64 Processor Test Load PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NOTES Rising Edge Rate δV/δt 2 10 V/ns 1 Falling Edge Rate δV/δt 2 10 V/ns 1 Differential Voltage VDIFF 0.4 1.25 2.3 V 1 Change in VDIFF_DC Magnitude ∆VDIFF -150 150 mV 1 Common Mode Voltage VCM 1.05 1.25 1.45 V 1 Change in Common Mode Voltage ∆VCM -200 200 mV 1 Jitter, Cycle to cycle tjcyc-cyc Measurement from differential wavefrom. Maximum difference of cycle time between 2 adjacent cycles. 05 08 5 p s 1 Jitter, Accumulated tja Measured using the JIT2 software package with a Tek 7404 scope. TIE (Time Interval Error) measurement technique: Sample resolution = 50 ps, Sample Duration = 10 µs -1000 1000 1,2,3 Duty Cycle dt3 Measurement from differential wavefrom 45 53 % 1 Output Impedance RON Average value during switching transition. Used for determining series termination value. 15 35 55 Ω 1 Group Skew tsrc-skew Measurement from differential wavefrom 50 ps 1 1Guaranteed by design and characterization, not 100% tested in production. 2 All accumulated jitter specifications are guaranteed assuming that REF is at 14.31818MHz

3 Spread Spectrum is off

processor's test load. 0 V +/- 400 mV (differential measurement) Measured at the AMD64 processor's test load. (single- ended measurement)

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems Electrical Characteristics - HTTCLK Clock PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Notes Long Accuracy ppm see Tperiod min-max values -300 300 ppm 1,2 33.33MHz output nominal 29.9910 30.0090 ns 2 33.33MHz output spread 29.9910 30.1598 ns 2 66.67MHz output nominal 14.9955 15.0045 ns 2 66.67MHz output spread 14.9955 15.0799 ns 2 Output High Voltage VOH IOH = -1 mA 2.4 V 1 Output Low Voltage VOL IOL = 1 mA 0.55 V 1 V OH @MIN = 1.0 V -33 mA 1 VOH@ MAX = 3.135 V -33 mA 1 VOL @ MIN = 1.95 V 30 mA 1 VOL @ MAX = 0.4 V 38 mA 1 Edge Rate δV/δt Rising edge rate 1 4 V/ns 1 Edge Rate δV/δt Falling edge rate 1 4 V/ns 1 Rise Time tr1 VOL = 0.4 V, VOH = 2.4 V 0.5 2 ns 1 Fall Time tf1 VOH = 2.4 V, VOL = 0.4 V 0.5 2 ns 1 Duty Cycle dt1 VT = 1.5 V 45 55 % 1 Jitter, Cycle to cycle tjcyc-cyc VT = 1.5 V 180 ps 1 *TA = 0 - 70°C; VDD=3.3V +/-5%; CL = 30 pF (unless otherwise specified) 1Guaranteed by design and characterization, not 100% tested in production. 2 All Long Term Accuracy and Clock Period specifications are guaranteed with the assumption that REF is at 14.31818MHz Output High Current IOH Output Low Current IOL PCI33 Clock period HTT66 Clock period Tperiod Tperiod Electrical Characteristics - SRC/ATIG 0.7V Current Mode Differential Pair PARAMETER SYMBOL CONDITIONS* MIN TYP MAX UNITS Notes Current Source Output Impedance Zo VO = Vx 3000 Ω 1 Voltage High VHigh 660 850 mV 1,3 Voltage Low VLow -150 150 mV 1,3 Max Voltage Vovs 1150 mV 1 Min Voltage Vuds -300 mV 1 Crossing Voltage (abs) Vx(abs) 250 550 mV 1 Crossing Voltage (var) d-Vx Variation of crossing over all edges 140 mV 1 Long Accuracy ppm see Tperiod min-max values -300 300 ppm 1,2 100.00MHz nominal 9.9970 10.0030 ns 2 100.00MHz spread 9.9970 10.0533 ns 2 Absolute min period Tabsmin 100.00MHz nominal/spread 9.8720 ns 1,2 Rise Time tr VOL = 0.175V, VOH = 0.525V 175 700 ps 1 Fall Time tf VOH = 0.525V VOL = 0.175V 175 700 ps 1 Rise Time Variation d-tr VOL = 0.175V, VOH = 0.525V 125 ps 1 Fall Time Variation d-tf VOH = 0.525V VOL = 0.175V 125 ps 1 Duty Cycle dt3 Measurement from differential wavefrom 45 55 % 1 Skew tsk3 VT = 50% 100 ps 1 Jitter, Cycle to cycle tjcyc-cyc Measurement from differential wavefrom 85 ps 1 *TA = 0 - 70°C; VDD = 3.3 V +/-5%; CL =2pF, RS=33.2Ω, RP=49.9Ω, ΙREF = 475Ω 1Guaranteed by design and characterization, not 100% tested in production. 2 All Long Term Accuracy and Clock Period specifications are guaranteed assuming that REFOUT is at 14.31818MHz Average period Tperiod Statistical measurement on single ended signal Measurement on single ended signal using absolute value.

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems Electrical Characteristics - REF-14.318MHz PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Notes Long Accuracy ppm see Tperiod min-max values -100 100 ppm 1,2 Clock period T period 14.318MHz output nominal 69.8270 69.8550 ns 2 Clock Low Time T low Measure from < 0.6V 30.9290 37.9130 ns 2 Clock High Time T high Measure from > 2.0V 30.9290 37.9130 ns 2 Output High Voltage V OH IOH = -1 mA 2.4 V 1 Output Low Voltage V OL IOL = 1 mA 0.4 V 1 Output High Current I OH VOH @MIN = 1.0 V, VOH@MAX = 3.135 V -29 -23 mA 1 Output Low Current I OL VOL @MIN = 1.95 V, VOL @MAX = 0.4 V 29 27 mA 1 Rise Time t r1 VOL = 0.4 V, VOH = 2.4 V 1.5 ns 1 Fall Time t f1 VOH = 2.4 V, VOL = 0.4 V 1.5 ns 1 Skew t sk1 VT = 1.5 V 100 ps 1 Duty Cycle d t1 VT = 1.5 V 44 53 56 % 1 Jitter t jcyc-cyc VT = 1.5 V 200 300 ps 1 *TA = 0 - 70°C; Supply Voltage VDD = 3.3 V +/-5%, CL = 5 pF with Rs = 22Ω (unless otherwise specified) 1Guaranteed by design and characterization, not 100% tested in production. 2 All Long Term Accuracy and Clock Period specifications are guaranteed assuming that REFOUT is at 14.31818MHz Electrical Characteristics - USB - 48MHz PARAMETER SYMBOL CONDITIONS* MIN TYP MAX UNITS NOTES Long Accuracy ppm see Tperiod min-max values -100 100 ppm 1,2 Clock period T period 48.00MHz output nominal 20.8229 20.8344 ns 2 Clock Low Time T low Measure from < 0.6V 9.3750 11.4580 ns 2 Clock High Time T high Measure from > 2.0V 9.3750 11.4580 ns 2 Output High Voltage V OH IOH = -1 mA 2.4 V 1 Output Low Voltage V OL IOL = 1 mA 0.55 V 1 V OH @MIN = 1.0 V -33 mA 1 VOH@MAX = 3.135 V -33 mA 1 VOL @ MIN = 1.95 V 30 mA 1 VOL @ MAX = 0.4 V 38 mA 1 Rise Time t r_USB VOL = 0.4 V, VOH = 2.4 V 0.5 1.5 ns 1 Fall Time t f_USB VOH = 2.4 V, VOL = 0.4 V 0.5 1.5 ns 1 Duty Cycle d t1 VT = 1.5 V 45 55 % 1 Group Skew t skew VT = 1.5 V 100 ps 1 Jitter, Cycle to cycle tjcyc-cyc VT = 1.5 V 130 ps 1,2 *TA = 0 - 70°C; Supply Voltage VDD = 3.3 V +/-5%, CL = 5 pF with Rs = 22Ω (unless otherwise specified) 1Guaranteed by design and characterization, not 100% tested in production. 2ICS recommended and/or chipset vendor layout guidelines must be followed to meet this specification Output High Current I OH Output Low Current I OL

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems RESET_IN# - Assertion (transition from '1' to '0') The pin is a Schmitt trigger input with debouncing. After it is triggered, REF clocks will wait for two clock cycle to Asserting RESET_IN pin stops all the outputs including CPU, SRC, ATIG, PCI and USB with the REF[2:0] running. be power down and re-power up, and SMBus will be reloaded. It will take no more than 2.5mS for the clocks to come out with correct frequencies and no glitches. ** Deassertion of RE SE T_IN# (transition from '0' to '1') has NO effect on the clocks. ensure the RESET_IN is asserted. Then, it will take 3uS for the clocks to stop without glitches. The clock chip will 2.5mS max3 uS max 2 clock cycles RESET_IN# REF [2:0] *CLKS

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems SRC Routing Information SRC Reference Clock Common Recommendations for Differential Routing Dimension or Value Unit Figure L1 length, Route as non-coupled 50 ohm trace. 0.5 max inch 2, 3 L2 length, Route as non-coupled 50 ohm trace. 0.2 max inch 2, 3 L3 length, Route as non-coupled 50 ohm trace. 0.2 max inch 2, 3 Rs 33 ohm 2, 3 Rt 49.9 ohm 2, 3 Down Device Differential Routing Dimension or Value Unit Figure L4 length, Route as coupled microstrip 100 ohm differential trace. 2 min to 16 max inch 2 L4 length, Route as coupled stripline 100 ohm differential trace. 1.8 min to 14.4 max inch 2 Differential Routing to PCI Express Connector Dimension or Value Unit Figure L4 length, Route as coupled microstrip 100 ohm differential trace. 0.25 to 14 max inch 3 L4 length, Route as coupled stripline 100 ohm differential trace. 0.225 min to 12.6 max inch 3 Fig.1 Rs Rs Rt Rt HSCL Output Buffer PCI Ex REF_CLK Test Load L1 L2 L3’ L1’ L2’ L4’ Fig.2 Rs Rs Rt Rt HSCL Output Buffer PCI Ex Board Down Device REF_CLK Input L1 L2 L3’ L1’ L2’ L4’ Fig.3 Rs Rs Rt Rt HSCL Output Buffer PCI Ex Add In Board REF_CLK Input L1 L2 L3’ L1’ L2’ L4’

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems Fig. 1 Shared Pin Operation - Input/Output Pins The I/O pins designated by (input/output) on the ICS951464 serve as dual signal functions to the device. During initial power-up, they act as input pins. The logic level (voltage) that is present on these pins at this time is read and stored into a 5-bit internal data latch. At the end of Power-On reset, (see AC characteristics for timing values), the device changes the mode of operations for these pins to an output function. In this mode the pins produce the specified buffered clocks to external loads. To program (load) the internal configuration register for these pins, a resistor is connected to either the VDD (logic 1) power supply or the GND (logic 0) voltage potential. A 10 Kilohm (10K) resistor is used to provide both the solid CMOS programming voltage needed during the power-up programming period and to provide an insignificant load on the output clock during the subsequent operating period. Figure 1 shows a means of implementing this function when a switch or 2 pin header is used. With no jumper is installed Via to VDD Clock trace to load Series Term. Res. Programming Header Via to Gnd Device Pad 2K /c87 8.2K /c87 the pin will be pulled high. With the jumper in place the pin will be pulled low. If programmability is not necessary, than only a single resistor is necessary. The programming resistors should be located close to the series termination resistor to minimize the current loop area. It is more important to locate the series termination resistor close to the driver than the programming resistor.

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems

Ordering Information

Example: Designation for tape and reel packaging Lead Free, RoHS Compliant Package Type F = SSOP Revision Designator (will not correlate with datasheet revision) Device Type (consists of 3 to 7 digit numbers) XXXX y F LF T M I NM A XM I NM A X A 2.41 2.80 .095 .110 A1 0.20 0.40 .008 .016 b 0.20 0.34 .008 .0135 c 0.13 0.25 .005 .010 D E 10.03 10.68 .395 .420 E1 7.40 7.60 .291 .299 e h 0.38 0.64 .015 .025 L 0.50 1.02 .020 .040 N a0 °8 °0 °8 ° VARIATIONS M I NM A XM I NM A X 56 18.31 18.55 .720 .730 10-0034 0.635 BASIC 0.025 BASIC COMMON DIMENSIONS In Millimeters In Inches COMMON DIMENSIONS Reference Doc.: JEDEC Publication 95, MO-118 56-Lead, 300 mil Body, 25 mil, SSOP N SEE VARIATIONS SEE VARIATIONS D mm. D (inch) SYMBOL SEE VARIATIONS SEE VARIATIONS

IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems 1211B—09/17/09 ICS951464 IDTTM/ICSTM Programmable System Clock Chip for ATI RS/RD690 K8 TM - based Systems INDEX AREA INDEX AREA 121 2 N D E1 E /c97 SEATING PLANE SEATING PLANE AA2 e -C-- C - b c L aaa C Example: Designation for tape and reel packaging Lead Free, RoHS Compliant Package Type G = TSSOP Revision Designator (will not correlate with datasheet revision) Device Type (consists of 3 to 7 digit numbers) XXXX y G LF T 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 D E E1 6.00 6.20 .236 .244 e L 0.45 0.75 .018 .030 N a0 °8 °0 °8 ° VARIATIONS MIN MAX MIN MAX 56 13.90 14.10 .547 .555 1 0-0039 56-Lead 6.10 mm. Body, 0.50 mm. Pitch TSSOP (240 mil) (20 mil) SYMBOL In Millimeters In Inches COMMON DIMENSIONS COMMON DIMENSIONS SEE VARIATIONS SEE VARIATIONS 8.10 BASIC 0.319 BASIC 0.50 BASIC 0.020 BASIC SEE VARIATIONS SEE VARIATIONS N D mm. D (inch) Ref erence Doc.: JEDEC Publicat ion 95, M O-153

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Revision History

Rev. Issue Date Description Page # A 4/9/2008 Going to Release. - B 9/17/2009 Updated Power Group table. 4

Summary

Programmable System Clock Chip for ATI RS/RD690 K8TM - based Systems

Description