ICS952703 Datasheet, PDF (1/17 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for K7 System

Integrated
Circuit
Systems, Inc.
ICS952703
Preliminary Product Preview
Programmable Timing Control Hub for K7^TM System
Recommended Application:
SiS741 style chipset with 964 South Bridge.
Output Features:
• 1 - Pair of differential open drain CPU outputs
• 1 - Single-ended open drain CPU output
• 1 - Pair of current mode differential serial reference clock
• 8 - PCICLK @ 3.3V including 2 PCI clock free running
• 2 - AGPCLK @ 3.3V
• 3 - REF @ 3.3V
• 2 - ZCLK @ 3.3V
• 2 - IOAPIC @ 2.5V
• 1 - 12_48MHz @ 3.3V
• 1 - 24_48MHz @ 3.3V
Key Specifications:
• CPU Output Jitter <250ps
• AGP Output Jitter <250ps
• ZCLK Output Jitter <250ps
• PCI Output Jitter <500ps
• CPU-AGP/PCI/ZCLK skew: 2.5ns~3.5ns
Features/Benefits:
• Selectable synchronous/asynchronous AGP/PCI
frequency
• Programmable 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 reference input.
Functionality
Pin Configuration
Bit4 ^{Bit3 Bit2 Bit1 Bit0}
FS3 FS2 FS1 FS0
CPU
MHz
SRC
MHz
ZCLK
MHz
0
0
0
0
0 200.00 100.00 133.33
0
0
0
0
1 200.01 100.00 133.34
0
0
0
1
0 200.97 100.00 133.98
0
0
0
1
1 190.11 100.00 126.74
0
0
1
0
0 100.00 100.00 133.33
0
0
1
0
1 100.00 100.00 133.34
0
0
1
1
0 100.99 100.00 134.66
0
0
1
1
1 95.00 100.00 126.66
0
1
0
0
0 166.66 100.00 133.33
0
1
0
0
1 166.65 100.00 133.32
0
1
0
1
0 161.59 100.00 129.27
0
1
0
1
1 151.97 100.00 121.57
0
1
1
0
0 133.33 100.00 133.33
0
1
1
0
1 133.34 100.00 133.34
0
1
1
1
0 133.98 100.00 133.98
0
1
1
1
1 126.66 100.00 126.66
1
0
0
0
0 206.02 100.00 137.35
1
0
0
0
1 210.00 100.00 140.00
1
0
0
1
0 214.06 100.00 142.70
1
0
0
1
1 217.90 100.00 145.27
1
0
1
0
0 103.01 100.00 137.35
1
0
1
0
1 105.00 100.00 140.00
1
0
1
1
0 106.99 100.00 142.65
1
0
1
1
1 109.01 100.00 145.35
1
1
0
0
0 164.66 100.00 131.73
1
1
0
0
1 167.91 100.00 134.33
1
1
0
1
0 171.22 100.00 136.98
1
1
0
1
1 174.38 100.00 139.50
1
1
1
0
0 137.32 100.00 137.32
1
1
1
0
1 140.00 100.00 140.00
1
1
1
1
0 142.67 100.00 142.67
1
1
1
1
1 145.33 100.00 145.33
AGP
MHz
66.66
66.67
66.99
63.37
66.66
66.67
67.33
63.33
66.66
66.66
64.64
60.79
66.66
66.67
66.99
63.33
68.67
70.00
71.35
72.63
68.67
70.00
71.33
72.68
65.86
67.17
68.49
69.75
68.66
70.00
71.34
72.66
PCI
MHz
33.33
33.33
33.49
31.69
33.33
33.33
33.66
31.67
33.33
33.33
32.32
30.39
33.33
33.33
33.49
31.67
34.34
35.00
35.68
36.32
34.34
35.00
35.66
36.34
32.93
33.58
34.24
34.88
34.33
35.00
35.67
36.33
VDDREF 1
48 VDDLAPIC
**FS0/REF0 2
47 IOAPIC1
**FS1/REF1 3
46 IOAPIC0
**Mode/REF2 4
GNDREF 5
45 GNDAPIC
44 VDDSRC
X1 6
43 SRCCLKT
X2 7
GNDZ 8
42 SRCCLKC
41 GND
ZCLK0 9
ZCLK1 10
VDDZ 11
SCLK 12
VDDPCI 13
*FS2/PCICLK_F0 14
*FS3/PCICLK_F1 15
PCICLK0 16
PCICLK1 17
GNDPCI 18
VDDPCI 19
PCICLK2 20
*(PCI_STOP#)PCICLK3 21
*(CPU_STOP#)PCICLK4 22
40 CPUCLKODT1
39 GNDCPU
38 CPUCLKODT0
37 CPUCLKODC0
36 AVDD
35 AGND
34 IREF
33 SDATA
32 GNDAGP
31 AGPCLK0
30 AGPCLK1
29 VDDAGP
28 AVDD48
27 12_48MHz/SEL12_48#MHz*
*(PD#)PCICLK5 23
26 24_48MHz/SEL24_48#MHz**~
GNDPCI 24
25 GND48
48-SSOP
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
~ This output have 1.5X Drive Strength
0813B—05/17/05