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ICS952703

更新时间: 2024-11-10 22:55:27
品牌 Logo 应用领域
矽成 - ICSI /
页数 文件大小 规格书
17页 144K
描述
Programmable Timing Control Hub for K7 System

ICS952703 数据手册

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Integrated  
Circuit  
Systems, Inc.  
ICS952703  
Preliminary Product Preview  
Programmable Timing Control Hub for K7TM System  
Recommended Application:  
Features/Benefits:  
SiS741 style chipset with 964 South Bridge.  
Selectable synchronous/asynchronous AGP/PCI  
frequency  
Programmable output frequency.  
Output Features:  
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.  
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  
Uses external 14.318MHz reference input.  
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  
Functionality  
Pin Configuration  
Bit3  
FS3  
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
Bit2  
FS2  
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
Bit1  
FS1  
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
Bit0  
FS0  
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
CPU  
MHz  
SRC  
MHz  
ZCLK  
MHz  
AGP  
MHz  
PCI  
MHz  
VDDREF 1  
**FS0/REF0 2  
**FS1/REF1 3  
**Mode/REF2 4  
GNDREF 5  
48 VDDLAPIC  
47 IOAPIC1  
46 IOAPIC0  
45 GNDAPIC  
Bit4  
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
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  
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  
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  
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  
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  
VDDSRC  
44  
X1 6  
43 SRCCLKT  
42 SRCCLKC  
X2 7  
GND  
GNDZ 8  
41  
ZCLK0 9  
40 CPUCLKODT1  
GNDCPU  
ZCLK1 10  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
CPUCLKODT0  
CPUCLKODC0  
AVDD  
VDDZ 11  
SCLK 12  
VDDPCI 13  
AGND  
*FS2/PCICLK_F0 14  
*FS3/PCICLK_F1 15  
PCICLK0 16  
IREF  
1
0
0
1
0
0
1
0
0
1
0
1
SDATA  
GNDAGP  
PCICLK1 17  
AGPCLK0  
AGPCLK1  
VDDAGP  
GNDPCI 18  
0
0
0
0
1
1
0
1
VDDPCI 19  
PCICLK2 20  
0
1
0
0
AVDD48  
*(PCI_STOP#)PCICLK3 21  
*(CPU_STOP#)PCICLK4 22  
*(PD#)PCICLK5 23  
GNDPCI 24  
1
1
1
1
1
1
1
1
1
1
1
0
0
0
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
1
1
0
0
1
1
0
0
1
1
1
0
1
0
1
0
1
0
1
0
1
105.00  
106.99  
109.01  
164.66  
167.91  
171.22  
174.38  
137.32  
140.00  
142.67  
145.33  
100.00  
100.00  
100.00  
100.00  
100.00  
100.00  
100.00  
100.00  
100.00  
100.00  
100.00  
140.00  
142.65  
145.35  
131.73  
134.33  
136.98  
139.50  
137.32  
140.00  
142.67  
145.33  
70.00  
71.33  
72.68  
65.86  
67.17  
68.49  
69.75  
68.66  
70.00  
71.34  
72.66  
35.00  
35.66  
36.34  
32.93  
33.58  
34.24  
34.88  
34.33  
35.00  
35.67  
36.33  
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—05/17/05  

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