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ICS952801 Datasheet, PDF (1/22 Pages) Integrated Circuit Systems – Programmable Timing Control HubTM for K8TM processor
Integrated
Circuit
Systems, Inc.
ICS952801
Advance Information
Programmable Timing Control Hub™ for K8™ processor
Recommended Application:
SiS755/760 style chipset for AMD K8 Processor
Output Features:
• 2 - Pairs of differential push-pull K8CPU outputs
• 8 - PCICLK @ 3.3V
• 2 - AGPCLK @ 3.3V
• 3 - REF @ 3.3V
• 2 - ZCLK @ 3.3V
• 1 - 24_48MHz @ 3.3V
• 1 - 48MHz @ 3.3V
Key Specifications:
• CPU Output Jitter <250ps
• AGP Output Jitter <250ps
• ZCLK Output Jitter <250ps
• PCI Output Jitter <500ps
Functionality
Bit4 Bit3 Bit2 Bit1 Bit0 CPU ZCLK AGP
FS4 FS3 FS2 FS1 FS0 MHz MHz MHz
0
0
0
0
0 200.00 66.67 66.67
0
0
0
0
1 200.00 100.00 66.67
0
0
0
1
0 200.00 133.33 66.67
0
0
0
1
1 200.00 166.67 66.67
0
0
1
0
0 233.33 66.67 66.67
0
0
1
0
1 233.33 93.33 66.67
0
0
1
1
0 233.33 133.33 66.67
0
0
1
1
1 233.33 175.00 70.00
0
1
0
0
0 266.67 66.67 66.67
0
1
0
0
1 266.67 106.67 66.67
0
1
0
1
0 266.67 133.33 66.67
0
1
0
1
1 266.67 160.00 66.67
0
1
1
0
0 293.34 73.34 73.33
0
1
1
0
1 293.34 117.34 73.33
0
1
1
1
0 293.34 146.66 73.33
0
1
1
1
1 293.34 176.00 73.33
1
0
0
0
0 133.33 66.67 66.67
1
0
0
0
1 133.33 100.00 66.67
1
0
0
1
0 133.33 133.33 66.67
1
0
0
1
1 133.33 166.67 66.67
1
0
1
0
0 166.67 66.67 66.67
1
0
1
0
1 166.67 100.00 66.67
1
0
1
1
0 166.67 133.33 66.67
1
0
1
1
1 166.67 166.67 66.67
1
1
0
0
0 202.00 67.34 67.33
1
1
0
0
1 202.00 101.00 67.33
1
1
0
1
0 202.00 134.66 67.33
1
1
0
1
1 202.00 168.34 67.33
1
1
1
0
0 220.00 73.34 73.33
1
1
1
0
1 220.00 110.00 73.33
1
1
1
1
0 220.00 146.66 73.33
1
1
1
1
1 220.00 183.34 73.33
Features/Benefits:
• QuadRomTM frequency selection.
• Selectable synchronous/asynchronous AGP/PCI/ZCLK
frequency
• Linear Programmable CPU output frequency.
• Linear Programmable AGP/PCI output frequency.
• Programmable output divider ratios.
• Programmable output rise/fall time.
• Programmable output skew.
• Programmable spread percentage for EMI control.
• Watchdog timer technology to reset system if system
malfunctions.
• Programmable watch dog safe frequency.
• Support I2C Index read/write and block read/write
operations.
• Uses external 14.318MHz referience input.
Pin Configuration
PCI
MHz
33.33
33.33
33.33
33.33
33.33
33.33
33.33
35.00
33.33
33.33
33.33
33.33
36.66
36.66
36.66
36.66
33.33
33.33
33.33
33.33
33.33
33.33
33.33
33.33
33.66
33.66
33.66
33.66
36.66
36.66
36.66
36.66
VDDREF 1
48 CPU_STOP#*
**FS0/REF0 2
47 GNDCPU
**FS1/REF1 3
46 CPUCLK8T1
**FS2/REF2 4
GNDREF 5
45 CPUCLK8C1
44 VDDCPU
X1 6
43 VDDCPU
X2 7
42 CPUCLK8T0
GNDZ 8
41 CPUCLK8C0
ZCLK0 9
ZCLK1 10
40 GNDCPU
39 AGND
VDDZ 11
*PCI_STOP# 12
**FS3/PCICLK_F0 13
**FS4/PCICLK_F1 14
VDDPCI 15
GNDPCI 16
PCICLK0 17
PCICLK1 18
PCICLK2 19
PCICLK3 20
PCICLK4 21
PCICLK5 22
38 AVDD
37 PD#*
36 GNDAGP
35 AGPCLK0
34 AGPCLK1
33 VDDAGP
32 SCLK
31 AVDD48
30 48MHz
29 24_48MHz/SEL24_48MHz*
28 GND48
27 SDATA
GNDPCI 23
26 PCICLK7
VDDPCI 24
25 PCICLK6
48-SSOP
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
0719—01/22/03
ADVANCE INFORMATION documents contain information on products in the formative or design phase development. Characteristic data and other specifications are design goals.
ICS reserves the right to change or discontinue these products without notice. Third party brands and names are the property of their respective owners.
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