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参数资料
| 型号： | 951412AGLFT |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 220 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO56 |
| 封装： | 6.10 MM, 0.50 MM PITCH, GREEN, MO-153, TSSOP-56 |
| 文件页数： | 1/25页 |
| 文件大小： | 246K |
| 代理商： | 951412AGLFT |
Integrated
Circuit
Systems, Inc.
ICS951412
0883L—04/26/06
Functionality
Pin Configuration
Recommended Application:
ATI RS480 systems using AMD K8 processors
Output Features:
3 - 14.318 MHz REF clocks
1 - USB_48MHz USB clock
1 - HyperTransport 66 MHz clock seed
1 - PCI 33 MHz clock seed
2 - Pairs of AMD K8 clocks
6 - Pairs of SRC/PCI Express* clocks
2 - Pairs of ATIG (SRC/PCI Express) clocks
Features:
2 - Programmable Clock Request pins for SRC
clocks
Spread Spectrum for EMI reduction
Outputs may be disabled via SMBus
External crystal load capacitors for maximum
frequency accuracy
System Clock Chip for ATI RS480 K8-based Systems
CPU
HTT
PCI
MHz
0
Hi-Z
00
1X
X/3
X/6
0
1
0
180.00
60.00
30.00
0
1
220.00
73.12
36.56
1
0
100.00
66.66
33.33
1
0
1
133.33
66.66
33.33
1
200.00
66.66
33.33
FS1
FS0
FS2
56 Pin SSOP/TSSOP
Power Groups
VDD
GND
56
55
Xtal, REF
51
49
PCICLK output
48
46
HTTCLK output
43
42
CPU Outputs
14, 21,
32,35
15, 20,
26,31,36
SRC outputs
39
38
Analog, CPU PLL
3
5
USB_48MHz output
Pin Number
Description
X1 1
56 VDDREF
X2 2
55 GND
VDD48 3
54 **FS0/REF0
USB_48MHz 4
53 **FS1/REF1
GND 5
52 REF2
NC 6
51 VDDPCI
SCLK 7
50 PCICLK0
SDATA 8
49 GNDPCI
**FS2 9
48 VDDHTT
**CLKREQA# 10
47 HTTCLK0
**CLKREQB# 11
46 GNDHTT
SRCCLKT7 12
45 CPUCLK8T0
SRCCLKC7 13
44 CPUCLK8C0
VDDSRC 14
43 VDDCPU
GNDSRC 15
42 GNDCPU
SRCCLKT6 16
41 CPUCLK8T1
SRCCLKC6 17
40 CPUCLK8C1
SRCCLKT5 18
39 VDDA
SRCCLKC5 19
38 GNDA
GNDSRC 20
37 IREF
VDDSRC 21
36 GNDSRC
SRCCLKT4 22
35 VDDSRC
SRCCLKC4 23
34 SRCCLKT0
SRCCLKT3 24
33 SRCCLKC0
SRCCLKC3 25
32 VDDATI
GNDSRC 26
31 GNDATI
ATIGCLKT1 27
30 ATIGCLKT0
ATIGCLKC1 28
29 ATIGCLKC0
Note: Pins preceeded by '**' have a 120 Kohm Internal Pull Down resistor
IC
S951
41
2
*Other names and brands may be claimed as the property of others.
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