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ICS9248-171 PDF预览

ICS9248-171

更新时间: 2024-11-11 11:14:51
品牌 Logo 应用领域
矽成 - ICSI 时钟
页数 文件大小 规格书
15页 210K
描述
AMD - K7TM System Clock Chip

ICS9248-171 数据手册

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ICS9248-171  
Integrated  
Circuit  
Systems, Inc.  
Advance Information  
AMD - K7™ System Clock Chip  
Recommended Application:  
ALI 1647 style chipset  
Output Features:  
Pin Configuration  
48  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
*DG_STOP#  
*PD#  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
GND  
CPUCLKT0  
CPUCLKC0  
CPUCLKT1  
SDATA  
SDRAM0  
SDRAM1  
GND  
1 - Differential pair open drain CPU clocks  
1 - Single-ended open drain CPU clock  
13 - SDRAM @ 3.3V  
7 - PCI @3.3V  
2 - AGP @ 3.3V  
GND  
X1  
X2  
AVDD  
**FS0/REF0  
VDD  
**FS1/AGP0  
AGP1  
VDD  
SDRAM2  
SDRAM3  
SDRAM4  
SDRAM5  
VDD  
1 - 48MHz, @3.3V  
GND  
1 - REF @3.3V, (selectable strength) through I2C  
*FS2/PCICLK_F  
PCICLK0  
PCICLK1  
PCICLK2  
GND  
Features:  
GND  
Up to 147MHz frequency support  
SDRAM6  
SDRAM7  
SDRAM8  
SDRAM9  
GND  
Support power management: DG stop, PCI stop and  
VDD  
Power down Mode from I2C programming.  
*MODE/PCICLK3  
PCICLK4  
PCICLK5  
AVDD48  
**FS3/48MHz  
GND  
Spread spectrum for EMI control (0 to -0.5% down  
spread, ± 0.25% center spread).  
VDD  
SDRAM10(PCI_STOP#)*  
SDRAM11  
SDRAM12  
Uses external 14.318MHz crystal  
SCLK  
Skew Specifications:  
CPUT - CPUC: <250ps  
PCI - PCI: <500ps  
CPU - SDRAM: <350ps  
SDRAM - SDRAM: <250ps  
AGP - AGP: <250ps  
PCI - AGP: <350ps  
48-Pin 300mil SSOP &  
240mil TSSOP package  
Notes:  
REF0 could be 1X or 2X strength controlled by I2C.  
* Internal Pull-up Resistor of 120K to VDD  
** Internal pull-down of 120K to GND.  
CPU - PCI: <3ns  
Block Diagram  
Functionality  
FS3  
0
0
0
0
0
0
0
0
1
1
1
1
1
0
1
1
FS2  
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
FS1 FS0  
CPU SDRAM  
66.66 66.66  
PLL2  
48MHz  
REF0  
0
0
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
0
1
66.66 100.00  
100.00 66.66  
100.00 100.00  
100.00 133.33  
120.00 120.00  
133.33 100.00  
133.33 133.33  
X1  
X2  
XTAL  
OSC  
PLL1  
Spread  
Spectrum  
CPU  
DIVDER  
CPUCLKT (1:0)  
CPUCLKC0  
2
90.00  
90.00  
101.00 101.00  
100.00 66.66  
100.00 100.00  
100.00 133.33  
126.00 126.00  
133.33 100.00  
133.33 133.33  
SDRAM  
DIVDER  
Stop  
Stop  
SDRAM (12:0)  
Control  
Logic  
SDATA  
SCLK  
13  
6
PCI  
DIVDER  
FS (3:0)  
PCICLK (5:0)  
PCICLK_F  
AGP (1:0)  
Config.  
Reg.  
PD#  
PCI_STOP#  
DG_STOP#  
MODE  
AGP  
DIVDER  
Stop  
2
Power Groups  
AVDD = Xtal, Core PLL  
AVDD48 = 48MHz, Fixed PLL  
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.  
9248-171 Rev - 12/29/00  
Third party brands and names are the property of their respective owners.  

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