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參數資料
| 型號： | ICS9248YG-171-T |
| 英文描述： | AMD - K7TM System Clock Chip |
| 中文描述： | AMD公司- K7TM系統時鐘芯片 |
| 文件頁數： | 1/15頁 |
| 文件大小： | 210K |
| 代理商： | ICS9248YG-171-T |
Integrated
Circuit
Systems, Inc.
ICS9248-171
Third party brands and names are the property of their respective owners.
Block Diagram
9248-171 Rev - 12/29/00
Functionality
Pin Configuration
48-Pin 300mil SSOP &
240mil TSSOP package
Recommended Application:
ALI 1647 style chipset
Output Features:
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
1 - 48MHz, @3.3V
1 - REF @3.3V, (selectable strength) through I
2
C
Features:
Up to 147MHz frequency support
Support power management: DG stop, PCI stop and
Power down Mode from I
2
C programming.
Spread spectrum for EMI control (0 to -0.5% down
spread, ± 0.25% center spread).
Uses external 14.318MHz crystal
Skew Specifications:
CPUT - CPUC: <250ps
PCI - PCI: <500ps
CPU - SDRAM: <350ps
SDRAM - SDRAM: <250ps
AGP - AGP: <250ps
PCI - AGP: <350ps
CPU - PCI: <3ns
AMD - K7 System Clock Chip
*DG_STOP#
*PD#
GND
X1
X2
AVDD
**FS0/REF0
VDD
**FS1/AGP0
AGP1
GND
*FS2/PCICLK_F
PCICLK0
PCICLK1
PCICLK2
GND
VDD
*MODE/PCICLK3
PCICLK4
PCICLK5
AVDD48
**FS3/48MHz
GND
SCLK
GND
CPUCLKT0
CPUCLKC0
CPUCLKT1
SDATA
SDRAM0
SDRAM1
GND
VDD
SDRAM2
SDRAM3
SDRAM4
SDRAM5
VDD
GND
SDRAM6
SDRAM7
SDRAM8
SDRAM9
GND
VDD
SDRAM10(PCI_STOP#)*
SDRAM11
SDRAM12
I
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
Advance Information
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.
PLL2
PLL1
Spread
Spectrum
48MHz
CPUCLKT (1:0)
SDRAM (12:0)
PCICLK (5:0)
AGP (1:0)
2
6
13
2
PCICLK_F
CPUCLKC0
X1
X2
XTAL
OSC
DCPU
SDRAM
DIVDER
PCI
DIVDER
AGP
DIVDER
Stop
Stop
Stop
SDATA
SCLK
FS (3:0)
PD#
PCI_STOP#
DG_STOP#
MODE
Control
Logic
Config.
Reg.
REF0
Notes:
REF0 could be 1X or 2X strength controlled by I
2
C.
* Internal Pull-up Resistor of 120K to VDD
** Internal pull-down of 120K to GND.
Power Groups
AVDD = Xtal, Core PLL
AVDD48 = 48MHz, Fixed PLL
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
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
FS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
CPU
66.66
66.66
100.00
100.00
100.00
120.00
133.33
133.33
90.00
101.00
100.00
100.00
100.00
126.00
133.33
133.33
SDRAM
66.66
100.00
66.66
100.00
133.33
120.00
100.00
133.33
90.00
101.00
66.66
100.00
133.33
126.00
100.00
133.33
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