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ICS952703 Datasheet

  • ICS952703

  • Programmable Timing Control Hub for K7 System

  • 17頁

  • ICS

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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.
Features/Benefits:
鈥?/div>
Selectable synchronous/asynchronous AGP/PCI
frequency
鈥?/div>
Programmable output frequency.
Output Features:
鈥?/div>
Programmable output divider ratios.
鈥?/div>
1 - Pair of differential open drain CPU outputs
鈥?/div>
Programmable output rise/fall time.
鈥?/div>
1 - Single-ended open drain CPU output
Programmable output skew.
鈥?/div>
1 - Pair of current mode differential serial reference clock 鈥?/div>
鈥?/div>
Programmable spread percentage for EMI control.
鈥?/div>
8 - PCICLK @ 3.3V including 2 PCI clock free running
鈥?/div>
Watchdog timer technology to reset system
鈥?/div>
2 - AGPCLK @ 3.3V
if system malfunctions.
鈥?/div>
3 - REF @ 3.3V
鈥?/div>
Programmable watch dog safe frequency.
鈥?/div>
2 - ZCLK @ 3.3V
鈥?/div>
Support I2C Index read/write and block read/write
鈥?/div>
2 - IOAPIC @ 2.5V
operations.
鈥?/div>
1 - 12_48MHz @ 3.3V
鈥?/div>
Uses external 14.318MHz reference input.
鈥?/div>
1 - 24_48MHz @ 3.3V
Key Specifications:
鈥?/div>
CPU Output Jitter <250ps
鈥?/div>
AGP Output Jitter <250ps
鈥?/div>
ZCLK Output Jitter <250ps
鈥?/div>
PCI Output Jitter <500ps
鈥?/div>
CPU-AGP/PCI/ZCLK skew: 2.5ns~3.5ns
Functionality
Bit4
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
Bit3
FS3
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
Bit2
FS2
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
Bit1
FS1
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
Bit0
FS0
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
200.00
200.01
200.97
190.11
100.00
100.00
100.99
95.00
166.66
166.65
161.59
151.97
133.33
133.34
133.98
126.66
206.02
210.00
214.06
217.90
103.01
105.00
106.99
109.01
164.66
167.91
171.22
174.38
137.32
140.00
142.67
145.33
SRC
MHz
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
ZCLK
MHz
133.33
133.34
133.98
126.74
133.33
133.34
134.66
126.66
133.33
133.32
129.27
121.57
133.33
133.34
133.98
126.66
137.35
140.00
142.70
145.27
137.35
140.00
142.65
145.35
131.73
134.33
136.98
139.50
137.32
140.00
142.67
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
Pin Configuration
VDDREF 1
**FS0/REF0 2
**FS1/REF1 3
**Mode/REF2 4
GNDREF 5
X1 6
X2 7
GNDZ 8
ZCLK0 9
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
*(PD#)PCICLK5 23
GNDPCI 24
48 VDDLAPIC
47 IOAPIC1
46 IOAPIC0
45 GNDAPIC
44 VDDSRC
43 SRCCLKT
42 SRCCLKC
41 GND
ICS952703
ZCLK1 10
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*
26 24_48MHz/SEL24_48#MHz**~
25 GND48
48-SSOP
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
~ This output have 1.5X Drive Strength
0813B鈥?5/17/05

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