Integrated
Circuit
ICS952011
Systems, Inc.
Programmable Timing Control Hub™ for P4™ processor
Recommended Application:
Features/Benefits:
SIS 645/645DX/648/650 style chipsets.
•
Selectable asynchronous/synchronous AGP, ZCLK and
PCI outputs
Supports DDR333 OEM frequencies
Programmable output frequency, divider ratios, output
rise/falltime, output skew.
Programmable spread percentage for EMI control.
Watchdog timer technology to reset system
if system malfunctions.
Output Features:
•
•
•
2 - Pairs of differential CPUCLKs (differential current mode)
•
•
1 - SDRAM @ 3.3V
9 - PCI @3.3V (including 2 free-running)
•
•
•
•
•
•
•
2 - AGP @ 3.3V
2 - ZCLKs @ 3.3V
•
•
Programmable watch dog safe frequency.
1- 12/48MHZ @ 3.3V
Support I2C Index read/write and block read/write
operations.
1- 24/48MHz, @3.3V selectable by I2C
3- REF @3.3V, 14.318MHz.
•
•
•
For PC133 SDRAM system use the ICS9179-16 as the
memory buffer.
For DDR SDRAM system use the ICS93735 or
ICS93732 as the memory buffer.
Key Specifications:
•
•
•
PCI - PCI output skew: < 500ps
CPU - SDRAM output skew: < 1ns
AGP - AGP output skew: <150ps
Uses external 14.318MHz crystal.
Functionality
Pin Configuration
Bit2
FS4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit7
FS3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
Bit6
FS2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
Bit5
FS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
Bit4
FS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
CPU
MHz
SDR
MHz
AGP
MHz
PCI
MHz
ZCLK
MHz
66.80
66.80
66.80
66.80
66.80
66.80
66.80
66.80
66.68
66.68
66.68
66.68
66.68
66.80
66.68
VDDREF 1
**FS0/REF0 2
**FS1/REF1 3
**FS2/REF2 4
GNDREF 5
48 VDDSDR
47 SDRAM_OUT
46 GND
45 CPU_STOP#(PD#)*
44 CPUCLKT1
43 CPUCLKC1
42 VDDCPU
100.20
100.20
100.20
100.20
133.60
133.60
133.60
133.60
200.05
200.05
200.05
200.05
166.70
166.70
160.04
166.70
100.20
100.20
100.20
100.20
133.60
133.60
133.60
133.60
200.05
200.05
200.05
200.05
166.70
166.70
160.04
166.70
100.20
133.60
200.40
167.00
100.20
133.60
200.40
167.00
100.03
133.37
200.05
160.04
100.20
133.36
200.05
166.70
100.20
133.60
200.40
167.00
100.20
133.60
200.40
167.00
100.03
133.37
200.05
160.04
100.20
133.36
200.05
166.70
66.80
66.80
66.80
66.80
66.80
66.80
66.80
66.80
66.68
66.68
66.68
66.68
66.68
66.80
66.68
66.68
66.80
66.80
66.80
66.80
66.80
66.80
66.80
66.80
66.68
66.68
66.68
66.68
66.68
66.80
66.68
66.68
33.40
33.40
33.40
33.40
33.40
33.40
33.40
33.40
33.34
33.34
33.34
33.34
33.40
33.40
33.34
33.34
33.40
33.40
33.40
33.40
33.40
33.40
33.40
33.40
33.34
33.34
33.34
33.34
33.40
33.40
33.34
33.34
X1 6
X2 7
GNDZ 8
ZCLK0 9
ZCLK1 10
VDDZ 11
41 GNDCPU
40 CPUCLKT0
39 CPUCLKC0
38 IREF
37 GND
36 VDDA
*(PCI_STOP#)PCICLK6 12
VDDPCI 13
**FS3/PCICLK_F0 14
**FS4/PCICLK_F1 15
*MODE0/PCICLK0 16
PCICLK1 17
GNDPCI 18
35 SCLK
34 SDATA
0
1
1
0
1
0
1
0
1
0
66.68
133.60
133.60
133.60
133.60
133.60
133.60
133.60
133.60
133.37
133.37
133.37
133.37
133.60
133.60
133.37
133.37
1
0
0
0
1
33 Vtt_PwrGd/PD#(CPUSTOP#)*
32 GNDAGP
31 AGPCLK0
30 AGPCLK1
29 VDDAGP
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
1
1
1
1
0
0
0
0
1
1
1
1
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
VDDPCI 19
PCICLK2 20
PCICLK3 21
PCICLK4 22
PCICLK5 23
GNDPCI 24
28 VDD48
27 12_48MHz/SEL12_48#**
26 24_48MHz/SEL24_48#*~
25 GND48
48-SSOP
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
~ This output has 1.5X drive strength
0721A—07/29/03