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Integrated Circuit Systems, Inc.
ICS932S825
Low Power Clock Chip for Serverworks HT2400 Servers
Recommended Application:
Serverworks HT2400-based systems using AMD Opteron processors
Pin Configuration
X1 X2 VDDREF_STB REF0_RUN_2x FS1/REF1_2x FS2/REF2_2x GNDREF VDD48 48MHz_0_2x 48MHz_1_2x GND48 SCLK SDATA VDDPCI PCICLK0_2x PCICLK1_2x GNDPCI CLKPWRGD/PD# GND VDDA GNDA GND PCIeT_L0 PCIeC_L0 PCIeT_L1 PCIeC_L1 GND VDDPCIe PCIeT_L2 PCIeC_L2 PCIeT_L3 PCIeC_L3 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 31 32 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 VDD25MHz FS0/25MHz_0_2x 25MHz_1_2x GND25MHz SPREAD_EN CPUK8GT_L6 CPUK8GC_L6 CPUK8GT_L5 CPUK8GC_L5 VDDCPU GND CPUK8GT_L4 CPUK8GC_L4 CPUK8GT_L3 CPUK8GC_L3 CPUK8GT_L2 CPUK8GC_L2 VDDCPU GND CPUK8GT_L1 CPUK8GC_L1 CPUK8GT_L0 CPUK8GC_L0 GND PCIeT_L6 PCIeC_L6 PCIeT_L5 PCIeC_L5 VDDPCIe GND PCIeT_L4 PCIeC_L4
Output Features:
* * * * * * 7 - Pairs of AMD Low Power K8 Greyhound compliant clocks 7 - Pair of SRC/PCI Express* Gen 2 clocks 3 - 14.318 MHz REF clocks including 1 free-running 2 - 48MHz clocks 2 - PCI 33 MHz clocks 2 - 25MHz clocks
Features:
* * * * * Spread Spectrum for EMI reduction Outputs may be disabled via SMBus M/N programming via SMBus PCIe clocks meet PCIe Gen 2. Low Power differential outputs
Functionality
FS2 FS1 FS0 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 CPU (MHz) Hi-Z X/6 180.00 220.00 100.00 133.33 Reserved 200.00
64-TSSOP
Power Groups
Pin Number VDD 8 64 14 20 36, 28 55, 47 3
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Description 48MHz Clocks 25MHz Clocks 33 MHz PCI Clocks Analog Core PCIe clocks K8G CPU Clocks REF Clocks, Xtal Osc.
*Other names and brands may be claimed as the property of others.
GND 11 61 17 21 35, 27 54, 46 7
932S825
ICS932S825
Pin Description
PIN #
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 31 32
PIN NAME
X1 X2 VDDREF_STB REF0_RUN_2x FS1/REF1_2x FS2/REF2_2x GNDREF VDD48 48MHz_0_2x 48MHz_1_2x GND48 SCLK SDATA VDDPCI PCICLK0_2x PCICLK1_2x GNDPCI CLKPWRGD/PD# GND VDDA GNDA GND PCIeT_L0 PCIeC_L0 PCIeT_L1 PCIeC_L1 GND VDDPCIe PCIeT_L2 PCIeC_L2 PCIeT_L3 PCIeC_L3
TYPE
IN OUT PWR OUT I/O I/O PWR PWR OUT OUT PWR IN I/O PWR OUT OUT PWR IN PWR PWR PWR PWR OUT OUT OUT OUT PWR PWR OUT OUT OUT OUT
DESCRIPTION
Crystal input, Nominally 14.318MHz. Crystal output, Nominally 14.318MHz Ref, XTAL power supply, nominal 3.3V standby power 14.318MHz Free Running XTAL Output. This output runs as long as standby VDD is applied to the part. Default drive is 2 loads. Frequency select latch input pin / 14.318 MHz reference clock. Default 2 load drive. Frequency select latch input pin / 14.318 MHz reference clock. Default 2 load drive. Ground pin for the REF outputs. Power pin for the 48MHz output.3.3V 48MHz clock output. Default 2 load drive strength 48MHz clock output. Default 2 load drive strength Ground pin for the 48MHz outputs Clock pin of SMBus circuitry, 5V tolerant. Data pin for SMBus circuitry, 3.3V tolerant. Power supply for PCI clocks, nominal 3.3V 3.3V PCI clock output. Default 2 load drive strength. 3.3V PCI clock output. Default 2 load drive strength. Ground pin for the PCI outputs 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 high input. / Asynchronous active low input pin used to power down the device into a low power state. Ground pin. 3.3V power for the PLL core. Ground pin for the PLL core. Ground pin. True clock of 0.8V differential push-pull PCI_Express pair (no 50ohm resistor to GND needed) Complement clock of 0.8V differential push-pull PCI_Express pair. (no 50ohm resistor to GND needed) True clock of 0.8V differential push-pull PCI_Express pair (no 50ohm resistor to GND needed) Complement clock of 0.8V differential push-pull PCI_Express pair. (no 50ohm resistor to GND needed) Ground pin. Power supply for PCI Express clocks, nominal 3.3V True clock of 0.8V differential push-pull PCI_Express pair (no 50ohm resistor to GND needed) Complement clock of 0.8V differential push-pull PCI_Express pair. (no 50ohm resistor to GND needed) True clock of 0.8V differential push-pull PCI_Express pair (no 50ohm resistor to GND needed) Complement clock of 0.8V differential push-pull PCI_Express pair. (no 50ohm resistor to GND needed)
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ICS932S825
Pin Description (continued)
PIN #
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 PCIeC_L4 PCIeT_L4 GND VDDPCIe PCIeC_L5 PCIeT_L5 PCIeC_L6 PCIeT_L6 GND CPUK8GC_L0 CPUK8GT_L0 CPUK8GC_L1 CPUK8GT_L1 GND VDDCPU CPUK8GC_L2 CPUK8GT_L2 CPUK8GC_L3 CPUK8GT_L3 CPUK8GC_L4 CPUK8GT_L4 GND VDDCPU CPUK8GC_L5 CPUK8GT_L5 CPUK8GC_L6 CPUK8GT_L6 SPREAD_EN GND25MHz 25MHz_1_2x FS0/25MHz_0_2x VDD25MHz
PIN NAME
TYPE
OUT OUT PWR PWR OUT OUT OUT OUT PWR OUT OUT OUT OUT PWR PWR OUT OUT OUT OUT OUT OUT PWR PWR OUT OUT OUT OUT IN PWR OUT I/O PWR
DESCRIPTION
Complement clock of 0.8V differential push-pull PCI_Express pair. (no 50ohm resistor to GND needed) True clock of 0.8V differential push-pull PCI_Express pair (no 50ohm resistor to GND needed) Ground pin. Power supply for PCI Express clocks, nominal 3.3V Complement clock of 0.8V differential push-pull PCI_Express pair. (no 50ohm resistor to GND needed) True clock of 0.8V differential push-pull PCI_Express pair (no 50ohm resistor to GND needed) Complement clock of 0.8V differential push-pull PCI_Express pair. (no 50ohm resistor to GND needed) True clock of 0.8V differential push-pull PCI_Express pair (no 50ohm resistor to GND needed) Ground pin. Complementary signal of low-power differential push-pull AMD K8 "Greyhound" clock True signal of low-power differential push-pull AMD K8 "Greyhound" clock Complementary signal of low-power differential push-pull AMD K8 "Greyhound" clock True signal of low-power differential push-pull AMD K8 "Greyhound" clock Ground pin. Supply for CPU clocks, 3.3V nominal Complementary signal of low-power differential push-pull AMD K8 "Greyhound" clock True signal of low-power differential push-pull AMD K8 "Greyhound" clock Complementary signal of low-power differential push-pull AMD K8 "Greyhound" clock True signal of low-power differential push-pull AMD K8 "Greyhound" clock Complementary signal of low-power differential push-pull AMD K8 "Greyhound" clock True signal of low-power differential push-pull AMD K8 "Greyhound" clock Ground pin. Supply for CPU clocks, 3.3V nominal Complementary signal of low-power differential push-pull AMD K8 "Greyhound" clock True signal of low-power differential push-pull AMD K8 "Greyhound" clock Complementary signal of low-power differential push-pull AMD K8 "Greyhound" clock True signal of low-power differential push-pull AMD K8 "Greyhound" clock Asynchronous, active high input to enable spread spectrum functionality. Ground pin for the 25Mhz outputs 25MHz clock output, 3.3V. Default 2 load drive Frequency select latch input pin / Fixed 25MHz 3.3V clock output. Default 2 load drive Power supply for 25MHz clocks, 3.3V nominal.
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ICS932S825
General Description
The ICS932S825 is a main clock synthesizer chip that all clocks required by Serverworks HT2400-based servers. An SMBus interface allows full control of the device.
Block Diagram
REF (2:1), REF 0_RUN
X1 X2 XTAL OSC. FIXED PLL 48MHz(1:0)
25MHz PLL
25M DIV
25MHz(1:0)
FS(2:0) CKPWRGD/PD# SPREAD_EN SDATA SCLK
CPU/SRC/ PCI PLL CONTROL LOGIC
CPU DIV
CPUK8G(6:0)
PCI33 DIV
PCICLK(1:0)
SRC DIV
PCIe(6:0)
Single-ended Terminations (All Single-Ended Outputs) Series Resistor for Proper Termination Single-ended Number of Zo = 50 ohms Output Strength Loads on Board 1 Load 1 33 2 Load 1 39 (Default) 2 22 Differential Terminations Number of Differential Series Resistor for Proper Termination Zo = 50 ohms Loads on Board Output CPUK8Gx 1 33 PCIe_Lx 1 33
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ICS932S825
Frequency Selection Table Byte 0 Bit 4 Bit 3 Bit2 Bit1 Bit0 SS_EN FS3 FS2 FS1 FS0 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 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 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 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 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 1 CPU (MHz) Hi-Z X/4 180.00 220.00 100.00 133.33 200.00 184.00 188.00 192.00 196.00 204.00 208.00 212.00 216.00 Hi-Z X/4 180.00 220.00 100.00 133.33 200.00 184.00 188.00 192.00 196.00 204.00 208.00 212.00 216.00 SRC (MHz) Hi-Z X/8 90.00 110.00 100.00 100.00 100.00 92.00 94.00 96.00 98.00 102.00 104.00 106.00 108.00 Hi-Z X/8 90.00 110.00 100.00 100.00 100.00 92.00 94.00 96.00 98.00 102.00 104.00 106.00 108.00 PCI (MHz) Hi-Z x/24 30.00 36.67 33.33 33.33 Reserved 33.33 30.67 31.33 32.00 32.67 34.00 34.67 35.33 36.00 Hi-Z x/24 30.00 36.67 33.33 33.33 Reserved 33.33 30.67 31.33 32.00 32.67 34.00 34.67 35.33 36.00 Spread % N/A N/A 0 0 0 0 0 0 0 0 0 0 0 0 0 N/A N/A -0.5% -0.5% -0.5% -0.5% -0.5% -0.5% -0.5% -0.5% -0.5% -0.5% -0.5% -0.5% -0.5% OverClock Amount N/A N/A 0.90 1.10 1.00 1.00 1.00 0.92 0.94 0.96 0.98 1.02 1.04 1.06 1.08 N/A N/A 1.00 1.00 1.00 1.00 1.00 0.92 0.94 0.96 0.98 1.02 1.04 1.06 1.08
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ICS932S825
CPU Divider Ratios Divider (3:2) Bit 00 01 10 11 LSB 00 0000 0001 0010 0011 Address 2 3 5 15 Div 01 0100 0101 0110 0111 Address 4 6 10 30 Div 10 1000 1001 1010 1011 Address 8 12 20 60 Div 11 1100 1101 1110 1111 Address MSB 16 24 40 120 Div Divider (1:0)
PCI Divider Ratios Divider (3:2) Bit 00 01 10 11 LSB 00 0000 0001 0010 0011 Address 4 3 5 15 Div 01 0100 0101 0110 0111 Address 8 6 10 30 Div 10 1000 1001 1010 1011 Address 16 12 20 60 Div 11 1100 1101 1110 1111 Address MSB 32 24 40 120 Div Divider (1:0)
SRC Divider Ratios Divider (3:2) Bit 00 01 10 11 LSB 00 0000 0001 0010 0011 Address 2 3 5 7 Div 01 0100 0101 0110 0111 Address 4 6 10 14 Div 10 1000 1001 1010 1011 Address 8 12 20 28 Div 11 1100 1101 1110 1111 Address MSB 16 24 40 56 Div Divider (1:0)
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ICS932S825
Absolute Maximum Ratings
Parameter 3.3V Core Supply Voltage 3.3V Logic Input Supply Voltage Storage Temperature Ambient Operating Temp Input ESD protection human body model
1
Symbol
VDDA VDD Ts Tambient ESD prot
Min
Max
GND + 4.5V GND +4.5V
Units Notes
V V C C V 1 1 1
-50 0 2000
150 70
Operation at these extremes is neither implied nor guaranteed
Electrical Characteristics - Input/Supply/Common Output Parameters
TA = 0 - 70C; Supply Voltage VDD = 3.3 V +/-5% PARAMETER SYMBOL Input High Voltage VIH Input Low Voltage Input High Current Input Low Current IIL2 Operating Current Powerdown Current 3 Input Frequency 1 Pin Inductance Input Capacitance1 Clk Stabilization1,2 Modulation Frequency SMBus Voltage Low-level Output Voltage Current sinking at VOL = 0.4 V SCLK/SDATA Clock/Data Rise Time3 SCLK/SDATA 3 Clock/Data Fall Time
1 2
Conditions
MIN 2 VSS - 0.3 -5 -5 -200
TYP
MAX UNITS NOTES VDD + 0.3 V 1 0.8 5 V uA uA uA 250 15 mA mA MHz nH pF pF pF ms kHz V V mA 1000 300 ns ns 1 1 1 1
VIL IIH IIL1
IDD3.3OP IDD3.3PD Fi Lpin CIN COUT CINX TSTAB VDD VOL IPULLUP TRI2C TFI2C
VIN = VDD VIN = 0 V; Inputs with no pull-up resistors VIN = 0 V; Inputs with pull-up resistors all outputs driven all diff pairs Low/Low VDD = 3.3 V Logic Inputs Output pin capacitance X1 & X2 pins From VDD Power-Up or de-assertion of PD# to 1st clock Triangular Modulation @ IPULLUP
14.318 7 5 6 5 3 30 2.7 33 5.5 0.4
3 1 1 1 1 1,2 1 1 1 1 1 1
4 (Max VIL - 0.15) to (Min VIH + 0.15) (Min VIH + 0.15) to (Max VIL - 0.15)
Guaranteed by design and characterization, not 100% tested in production. See timing diagrams for timing requirements. 3 Input frequency should be measured at the REFOUT pin and tuned to ideal 14.31818MHz to meet ppm frequency accuracy on PLL outputs.
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ICS932S825
AC Electrical Characteristics - Low Power Differential PCIe Outputs
TA = 0 - 70C; VDD = 3.3 V +/-5%; CL =2pF, RS=33.2 PARAMETER SYMBOL CONDITIONS Rising Edge Slew Rate Falling Edge Slew Rate Slew Rate Variation Maximum Output Voltage Minimum Output Voltage t SLR tFLR t SLVAR VHIGH VLOW Differential Measurement Differential Measurement Single-ended Measurement Includes overshoot Includes undershoot -300 MIN 0.5 0.5 TYP MAX 2 2 20 1150 UNITS NOTES V/ns V/ns % mV mV mV 550 140 55 125 250 mV mV % ps ps 1,2 1,2 1 1 1 1 1,3,4 1,3,5 1 1 1
Differential Voltage VSWING Differential Measurement 400 Swing Single-ended Measurement 300 Crossing Point Voltage VXABS Single-ended Measurement Crossing Point Variation VXABSVAR Differential Measurement 45 Duty Cycle DCYC PCIe Jitter - Cycle to Differential Measurement PCIeJ C2C Cycle Differential Measurement PCIe[6:0] Skew PCIeSKEW Notes on Electrical Characteristics: 1 Guaranteed by design and characterization, not 100% tested in production. 2 Slew rate measured through Vswing centered around differential zero 3 Vxabs is defined as the voltage where CLK = CLK# 4 Only applies to the differential rising edge (CLK rising and CLK# falling) 5 Defined as the total variation of all crossing voltages of CLK rising and CLK# falling. 6 All Long Term Accuracy and Clock Period specifications are guaranteed assuming that REFOUT is
at 14.31818MHz
PCIe Phase Jitter Impact
Parameter Output phase jitter impact - PCIe* Gen1 Output phase jitter impact - PCIe Gen2 PCIe1 PCIe2 Conditions (including PLL BW 1.5-22 MHz, z = 0.54, Td=10 ns, Ftrk=1.5 MHz ) (including PLL BW5-16 MHz, 8 - 16 MHz, z = 0.54, Td=10 ns) Min 0 0 Typical Max 108 3.1 Units ps ps RMS Notes 1,2,3,4 1,2,3,4
NOTES: 1. Post processed evaluation through Intel supplied Matlab scripts. 2. PCIe* Gen2 filter characteristics are subject to final ratification by PC ISIG. Please check the PCI* SIG for the latest specification. 3. These jitter numbers are defined for a BER of 1E-12. Measured numbers at a smaller sample size have to be extrapolated to this BER target. 4. Guaranteed by design and characterization, not 100% tested in production.
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ICS932S825
AC Electrical Characteristics - Low Power Differential CPU Outputs
TA = 0 - 70C; VDD = 3.3 V +/-5%; CL =AMD64 Processor Test Load PARAMETER SYMBOL CONDITIONS VCROSS Crossing Point Variation Single-ended Measurement f Frequency Long Term Accuracy ppm Rising Edge Slew Rate Falling Edge Slew Rate CPU Jitter - Cycle to Cycle CPU Jitter - Accumulated Maximum Output Voltage Minimum Output Voltage Differential Voltage Swing Peak-to-Peak tSLR tFLR CPUJC2C CPUJACC VHIGH VLOW VDPK-PK Differential Measurement Differential Measurement Differential Measurement Over a 10 uS period Includes overshoot, single-ended measurement Includes undershoot, single-ended measurement Differential Measurement -1 MIN 198.8 -300 0.5 0.5 TYP MAX 140 200 300 10 10 150 1 1150 -300 400 2400 UNITS mV MHz ppm V/ns V/ns ps ns mV mV mV NOTES 1 2 3 4,5 4,5 6 7 1 1 8 9 10 11
VD Differential Measurement 200 1200 mV Differential Voltage Change in VD DC cycle-toVD Single-ended Measurement -75 75 mV cycle DCYC Duty Cycle Differential Measurement 45 55 % CPUSKEW10 CPU[6:0] Skew Differential Measurement 250 ps Notes on Electrical Characteristics (Guaranteed by design and characterization, not 100% tested in production):
1
Single-ended measurement at crossing point. Value is max-min over all time. DC value of common mode is not important due to the blocking cap. Minimum frequency results from 0.5% down spread. Measured with spread spectrum off. 4 This parameter is intended to give guidance for simulation. 5 Differential measurement through the range of +/-100mV 6 Between any two adjacent cycles. 7 Accumulated over a 10 uS time periode, measured with JIT2 TIE at 50ps interval. 8 VDPK-PK is the overall magnitude of the differential signal. 9 VDMIN is the amplitude of the ring-back differential measurement, guaranteed by design, that ring-back will not cross 0V VD. VDMAX is the largest amplitude allowed. 10 The difference in magnitude of two adjacent VDDC measurements. VDDC is the stable post overshoot and ring-back part 11 Defined as tHIGH/tCYCLE
3 2
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ICS932S825
Electrical Characteristics - 33 MHz PCICLK, 25MHz Outputs
TA = 0 - 70C; VDD=3.3V +/-5%; CL = 5 pF (unless otherwise specified) PARAMETER PCI Long Accuracy PCI Clock period 25MHz Long Accuracy 25MHz Clock period Output High Voltage Output Low Voltage Output High Current Output Low Current Edge Rate Edge Rate Duty Cycle PCI Skew 25MHz Skew Jitter, Cycle to cycle
1 2
SYMBOL ppm Tperiod ppm Tperiod VOH VOL IOH IOL V/t V/t dt1 tsk1 tsk1 tjcyc-cyc
CONDITIONS see Tperiod min-max values 33.33MHz output nominal 33.33MHz output spread see Tperiod min-max values 25MHz output nominal IOH = -1 mA IOL = 1 mA V OH @MIN = 1.0 V VOH@ MAX = 3.135 V VOL @ MIN = 1.95 V VOL @ MAX = 0.4 V Rising edge rate Falling edge rate VT = 1.5 V VT = 1.5 V VT = 1.5 V VT = 1.5 V
MIN -300 29.9910 29.9910 -50 2.4 -33 30 1 1 45
TYP
40
MAX UNITS 300 ppm 30.0090 ns 30.1598 ns 50 ns ns V 0.55 V mA -33 mA mA 38 mA 4 V/ns 4 V/ns 55 % 250 ps 250 ps 250 ps
Notes 1,2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1
Guaranteed by design and characterization, not 100% tested in production. All Long Term Accuracy and Clock Period specifications are guaranteed assuming that REF is at 14.31818MHz
Electrical Characteristics - 48MHz
TA = 0 - 70C; VDD = 3.3 V +/-5%; CL = 5 pF (unless otherwise specified) PARAMETER SYMBOL CONDITIONS ppm see Tperiod min-max values Long Accuracy Tperiod 48.00MHz output nominal Clock period IOH = -1 mA VOH Output High Voltage VOL IOL = 1 mA Output Low Voltage V OH @ MIN = 1.0 V IOH Output High Current VOH@ MAX = 3.135 V VOL @MIN = 1.95 V IOL Output Low Current VOL @ MAX = 0.4 V Edge Rate V/t Rising edge rate Edge Rate V/t Falling edge rate VT = 1.5 V dt1 Duty Cycle tsk1 VT = 1.5 V Group Skew VT = 1.5 V tjcyc-cyc Jitter, Cycle to cycle
1 2
MIN -100 20.8257 2.4 -33 30 1 1 45
TYP
MAX UNITS 100 ppm 20.8340 ns V 0.55 V mA -33 mA mA 38 mA 2 V/ns 2 V/ns 55 % 250 ps 250 ps
Notes 1,2 2 1 1 1 1 1 1 1 1 1 1 1
Guaranteed by design and characterization, not 100% tested in production. All Long Term Accuracy and Clock Period specifications are guaranteed assuming that REF is at 14.31818MHz
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ICS932S825
Electrical Characteristics - REF-14.318MHz
TA = 0 - 70C; VDD = 3.3 V +/-5%; CL = 5 pF (unless otherwise specified) PARAMETER SYMBOL CONDITIONS ppm see Tperiod min-max values Long Accuracy Tperiod 14.318MHz output nominal Clock period IOH = -1 mA VOH Output High Voltage IOL = 1 mA VOL Output Low Voltage V OH @MIN = 1.0 V, V IOH Output High Current @MAX = 3.135 V OH VOL @MIN = 1.95 V, VOL IOL Output Low Current @MAX = 0.4 V Edge Rate V/t Rising edge rate Edge Rate Falling edge rate V/t tsk1 VT = 1.5 V Skew VT = 1.5 V dt1 Duty Cycle tjcyc-cyc VT = 1.5 V Jitter, Cycle to cycle
1 2
MIN -300 69.8270 2.4 -29 29 1 1 45
TYP
MAX UNITS 300 ppm 69.8550 ns V 0.4 V -23 27 2 2 500 55 1000 mA mA V/ns V/ns ps % ps
Notes 1 2 1 1 1 1 1 1 1 1 1
Guaranteed by design and characterization, not 100% tested in production. All Long Term Accuracy and Clock Period specifications are guaranteed assuming that REF is at 14.31818MHz
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ICS932S825
General SMBus serial interface information How to Write:
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 * * * * * * * *
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
Index Block Write Operation
Controller (Host) starT bit T Slave Address D2(H) WR WRite Beginning Byte = N ACK Data Byte Count = X ACK Beginning Byte N ACK X Byte ICS (Slave/Receiver)
Index Block Read Operation
Controller (Host) T starT bit Slave Address D2(H) WR WRite Beginning Byte = N ACK RT Repeat starT Slave Address D3(H) RD ReaD ACK Data Byte Count = X ACK Beginning Byte N X Byte ICS (Slave/Receiver)
ACK
ACK
Byte N + X - 1 ACK P stoP bit
ACK
Byte N + X - 1 N P
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Not acknowledge stoP bit
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ICS932S825
SMBus Table: Frequency Select and Spread Control Register Pin # Name Control Function Byte 0 Reserved Reserved Bit 7 Reserved Reserved Bit 6 Reserved Reserved Bit 5 SS_EN Spread Spectrum Enable Bit 4 FS3 Freq Select Bit 3 Bit 3 FS2 Freq Select Bit 2 Bit 2 FS1 Freq Select Bit 1 Bit 1 FS0 Freq Select Bit 0 Bit 0 SMBus Table: Output Control Register Byte 1 Pin # Name 6 REF2 Bit 7 5 REF1 Bit 6 4 REF0_RUN Bit 5 17 PCICLK1 Bit 4 16 PCICLK0 Bit 3 Reserved Bit 2 10 48MHz_1 Bit 1 9 48MHz_0 Bit 0 SMBus Table: Output Control Register Byte 2 Pin # Name Reserved Bit 7 59/58 CPUK8G_L(6) Bit 6 57/56 CPUK8G_L(5) Bit 5 53/52 CPUK8G_L(4) Bit 4 51/50 CPUK8G_L(3) Bit 3 47/46 CPUK8G_L(2) Bit 2 45/44 CPUK8G_L(1) Bit 1 43/42 CPUK8G_L(0) Bit 0 SMBus Table: Output Control Register Byte 3 Pin # Name Reserved Bit 7 40/39 PCIe_L6 Bit 6 38/37 PCIe_L5 Bit 5 PCIe_L4 33/34 Bit 4 31/32 PCIe_L3 Bit 3 29/30 PCIe_L2 Bit 2 25/26 PCIe_L1 Bit 1 23/24 PCIe_L0 Bit 0
Type 0 1 RW Reserved Reserved RW Reserved Reserved RW Reserved Reserved RW RW See CPU Frequency Select RW Table RW RW
PWD 0 0 0 Latched 0 Latched Latched Latched
Control Function Output Enable Output Enable Output Enable Output Enable Output Enable Reserved Output Enable Output Enable
Type RW RW RW RW RW RW RW RW
0 Hi-Z Hi-Z Disable (Low) Disable (Low) Disable (Low) Reserved Disable (Low) Disable (Low)
1 Enable Enable Enable Enable Enable Reserved Enable Enable
PWD 1 1 1 1 1 1 1 1
Control Function Reserved Output Enable When Disabled CPUK8GT_L = 0 CPUK8GC_L = 0
Type RW RW RW RW RW RW RW RW
0 Reserved Disable Disable Disable Disable Disable Disable Disable
1 Reserved Enable Enable Enable Enable Enable Enable Enable
PWD 0 1 1 1 1 1 1 1
Control Function Reserved Output Enable When Disabled PCIeT_L = 0 PCIeC_L = 0
Type RW RW RW RW RW RW RW RW
0 Reserved Disable Disable Disable Disable Disable Disable Disable
1 Reserved Enable Enable Enable Enable Enable Enable Enable
PWD 0 1 1 1 1 1 1 1
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ICS932S825
SMBus Table: Drive Strength Control Register Byte 4 Pin # Name Control Function REF2 Drive Strength Select 6 Bit 7 REF1 Drive Strength Select 5 Bit 6 REF0_RUN Drive Strength Select 4 Bit 5 17 PCICLK1 Drive Strength Select Bit 4 PCICLK0 Drive Strength Select 16 Bit 3 11 48MHz_2 Drive Strength Select Bit 2 10 48MHz_1 Drive Strength Select Bit 1 9 48MHz_0 Drive Strength Select Bit 0 SMBus Table: Drive Strength Control Register Pin # Name Control Function Byte 5 62 25MHz_1 Output Enable Bit 7 63 25MHz_0 Output Enable Bit 6 62 25MHz_1 Drive Strength Select Bit 5 63 25MHz_0 Drive Strength Select Bit 4 Reserved Reserved Bit 3 VDIFF2 VDIFF MSB Bit 2 VDIFF1 VDIFF Select Bit 0 Bit 1 VDIFF0 VDIFF LSB Bit 0 SMBus Table: Device ID Register Byte 6 Pin # Name DevID 7 Bit 7 DevID 6 Bit 6 DevID 5 Bit 5 DevID 4 Bit 4 DevID 3 Bit 3 DevID 2 Bit 2 DevID 1 Bit 1 DevID 0 Bit 0 SMBus Table: Vendor ID Register Byte 7 Pin # Name RID3 Bit 7 RID2 Bit 6 RID1 Bit 5 RID0 Bit 4 VID3 Bit 3 VID2 Bit 2 VID1 Bit 1 VID0 Bit 0
Type RW RW RW RW RW RW RW RW
0 1 Load 1 Load 1 Load 1 Load 1 Load 1 Load 1 Load 1 Load
1 2 Loads 2 Loads 2 Loads 2 Loads 2 Loads 2 Loads 2 Loads 2 Loads
PWD 1 1 1 1 1 1 1 1
Type RW RW RW RW RW RW RW RW
0 Low Hi-Z 1 Load 1 Load Reserved
1 Enable Enable 2 Loads 2 Loads Reserved
See VDIFF Select Table
PWD 1 1 1 1 0 1 0 1
Control Function Device ID MSB Device ID 6 Device ID 5 Device ID4 Device ID3 Device ID2 Device ID1 Device ID LSB
Type R R R R R R R R
0 -
1 -
PWD 0 0 1 0 0 1 0 1
Control Function Revision ID
VENDOR ID (0001 = ICS)
Type R R R R R R R R
0 -
1 -
PWD 0 0 0 1 0 0 0 1
1276D--10/25/07
14
ICS932S825
SMBus Table: Byte Count Register Pin # Name Byte 8 BC7 Bit 7 BC6 Bit 6 BC5 Bit 5 BC4 Bit 4 BC3 Bit 3 BC2 Bit 2 BC1 Bit 1 BC0 Bit 0 SMBus Table: Reserved Register Pin # Name Byte 9 Reserved Bit 7 Reserved Bit 6 Reserved Bit 5 Reserved Bit 4 Reserved Bit 3 Reserved Bit 2 Reserved Bit 1 Reserved Bit 0
Control Function
Byte Count Programming b(7:0)
Type 0 1 RW RW Writing to this register will RW RW configure how many bytes RW will be read back, default is 9 bytes. RW RW RW
PWD 0 0 0 0 1 0 0 1
Control Function Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
Type RW RW RW RW RW RW RW RW
0 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
1 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
PWD 0 0 0 0 0 0 0 0
SMBus Table: M/N Programming Enable Byte 10 Pin # Name Control Function CPU PLL M/N Programming M/N_EN Bit 7 Enable Reserved Reserved Bit 6 Reserved Reserved Bit 5 Reserved Reserved Bit 4 Reserved Reserved Bit 3 Reserved Reserved Bit 2 Reserved Reserved Bit 1 Reserved Reserved Bit 0
Type RW RW RW RW RW RW RW RW
0 Disable -
1 Enable -
PWD 0 0 0 0 0 0 0 0
1276D--10/25/07
15
ICS932S825
Bytes 11:14 are Reserved Registers SMBus Table: CPU Frequency Control Register Byte 15 Pin # Name Control Function N Div8 N Divider Prog bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 N Div9 M Div5 M Div4 M Div3 M Div2 M Div1 M Div0 M Divider Programming bit (5:0) N Divider Prog bit 9
Type RW RW RW RW RW RW RW RW
0
1
The decimal representation of M and N Divier in Byte 11 and 12 will configure the CPU VCO frequency. Default at power up = latchin or Byte 0 Rom table. VCO Frequency = 14.318 x [NDiv(9:0)+8] / [MDiv(5:0)+2]
PWD X X X X X X X X
SMBus Table: CPU Frequency Control Register Pin # Name Control Function Byte 16 N Div7 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 N Div6 N Div5 N Div4 N Div3 N Div2 N Div1 N Div0 N Divider Programming Byte12 bit(7:0) and Byte11 bit(7:6)
Type RW RW RW RW RW RW RW RW
0
1
The decimal representation of M and N Divier in Byte 11 and 12 will configure the CPU VCO frequency. Default at power up = latchin or Byte 0 Rom table. VCO Frequency = 14.318 x [NDiv(9:0)+8] / [MDiv(5:0)+2]
PWD X X X X X X X X
SMBus Table: CPU Spread Spectrum Control Register Byte 17 Pin # Name Control Function SSP7 Bit 7 SSP6 Bit 6 SSP5 Bit 5 Spread Spectrum SSP4 Bit 4 Programming bit(7:0) SSP3 Bit 3 SSP2 Bit 2 SSP1 Bit 1 SSP0 Bit 0
Type 0 1 RW RW RW These Spread Spectrum bits in Byte 13 and 14 will RW program the spread RW pecentage of CPU RW RW RW
PWD X X X X X X X X
1276D--10/25/07
16
ICS932S825
SMBus Table: CPU Spread Spectrum Control Register Byte 18 Pin # Name Control Function Reserved Reserved Bit 7 SSP14 Bit 6 SSP13 Bit 5 SSP12 Bit 4 Spread Spectrum SSP11 Bit 3 Programming bit(14:8) SSP10 Bit 2 SSP9 Bit 1 SSP8 Bit 0 SMBus Table: Programmable Output Divider Register Pin # Name Control Function Byte 19 CPUDiv3 Bit 7 CPU Divider Ratio CPUDiv2 Bit 6 Programming Bits CPUDiv1 Bit 5 CPUDiv0 Bit 4 Reserved Reserved Bit 3 Reserved Reserved Bit 2 Reserved Reserved Bit 1 Reserved Reserved Bit 0 SMBus Table: Programmable Output Divider Register Pin # Name Control Function Byte 20 33MHzDiv3 Bit 7 33MHz Divider Ratio 33MHzDiv2 Bit 6 Programming Bits 33MHzDiv1 Bit 5 33MHzDiv0 Bit 4 SRC_Div3 Bit 3 SRC_ Divider Ratio SRC_Div2 Bit 2 Programming Bits SRC_Div1 Bit 1 SRC_Div0 Bit 0 SMBusTable: Reserved Regsiter Byte 21 is reserved do not write this register!
0 1 Type R RW RW These Spread Spectrum bits RW in Byte 13 and 14 will RW program the spread RW pecentage of CPU RW RW
PWD 0 X X X X X X X
Type RW RW RW RW R R R R
0
1
See CPU Divider Ratios Table -
PWD X X X X 0 0 0 0
Type 0 1 RW RW 33MHz Divider Ratio Table RW RW RW RW SRC Divider Ratio Table RW RW
PWD X X X X X X X X
1276D--10/25/07
17
ICS932S825
Shared Pin Operation Input/Output Pins
The I/O pins designated by (input/output) on the ICS932S825 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 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.
Programming Header Via to Gnd Device Pad
Via to VDD 2K W
8.2K W Clock trace to load Series Term. Res.
Fig. 1
1276D--10/25/07
18
ICS932S825
N
c
L
SYMBOL A A1 A2 b c D E E1 e L N aaa VARIATIONS
E1 INDEX AREA
E
12
D
A2 A1
A
6.10 mm. Body, 0.50 mm. Pitch TSSOP (240 mil) (20 mil) In Millimeters In Inches COMMON DIMENSIONS COMMON DIMENSIONS MIN MAX MIN MAX -1.20 -.047 0.05 0.15 .002 .006 0.80 1.05 .032 .041 0.17 0.27 .007 .011 0.09 0.20 .0035 .008 SEE VARIATIONS SEE VARIATIONS 8.10 BASIC 0.319 BASIC 6.00 6.20 .236 .244 0.50 BASIC 0.020 BASIC 0.45 0.75 .018 .030 SEE VARIATIONS SEE VARIATIONS 0 8 0 8 -0.10 -.004
-Ce
b SEA TING PLANE
N 64
D mm. MIN 16.90 MAX 17.10 MIN .665
D (inch) MAX .673
aaa C
Reference Doc.: JEDEC Publication 95, MO-153
10-0039
Ordering Information
ICS932S825YGLFT
Example:
ICS XXXX y G - LF T
Designation for tape and reel packaging Lead Free, RoHS Compliant (Optional) Package Type G = TSSOP
Revision Designator (will not correlate with datasheet revision)
Device Type Prefix ICS = Standard Device
1276D--10/25/07
19
ICS932S825
Revision History
Rev. Issue Date Description 1. Updated Electrical Characteristics. 2. Going to Preliminary. 02/28/07 3. Updated Idd to reflect low power outputs 09/11/07 1. Updated pin description 09/12/07 1. Updated quantity of PCIEX outputs listed under "Output Features" 1. 2. 3. 4. 5. Corrected CPU/SRC/PCI PLL control bytes to B(15:18) from B(11:14) Changed pin names to indicate default drive strength. NO silicon changes. Corrected Byte 0 SS_EN and FS3 reference in FS table. Simplified the Terminations Table.. Release to Final Page #
A B C
Various 2, 3 1
D
10/25/07
1, 2, 3, 4, 5, 16,17
1276D--10/25/07
20

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