ICS950405 Datasheet, PDF (1/16 Pages) Integrated Circuit Systems – AMD - K8 System Clock Chip

Integrated
Circuit
Systems, Inc.
ICS950405
AMD - K8™ System Clock Chip
Recommended Application:
AMD K8 System Clock with AMD, VIA or ALI Chipset
Output Features:
• 2 - Differential pair push-pull CPU clocks @
3.3V
• 9 - PCICLK (Including 1 free running) @ 3.3V
• 3 - Selectable PCICLK/HTTCLK @ 3.3V
• 1 - HTTCLK @ 3.3V
• 1 - 48MHz @ 3.3V fixed.
• 1 - 24/48MHz @ 3.3V
• 3 - REF @ 3.3V, 14.318MHz.
Features:
• Programmable output frequency.
• Programmable output divider ratios.
• Programmable output rise/fall time.
• Programmable output skew.
• Programmable spread percentage for EMI control.
• Watchdog timer technology and RESET# output to
reset system
if system malfunctions.
• Programmable watch dog safe frequency.
• Support I²C Index read/write and block read/write
operations.
• Uses external 14.318MHz crystal.
• Supports Hyper Transport Technology (HTTCLK).
Functionality
FS3 FS2 FS1 FS0
CPU
MHz
HTT
MHz
0
0
0
0 100.90 67.27
0
0
0
1 133.90 66.95
0
0
1
0 168.00 67.20
0
0
1
1 202.00 67.33
0
1
0
0 100.20 66.80
0
1
0
1 133.50 66.75
0
1
1
0 166.70 66.68
0
1
1
1 200.40 66.80
1
0
0
0 150.00 60.00
1
0
0
1 180.00 60.00
1
0
1
0 210.00 70.00
1
0
1
1 240.00 60.00
1
1
0
0 270.00 67.50
1
1
0
1 233.33 66.67
1
1
1
0 266.67 66.67
1
1
1
1 300.00 75.00
PCI
MHz
33.63
33.48
33.60
33.67
33.40
33.38
33.34
33.40
30.00
30.00
35.00
30.00
33.75
33.33
33.33
37.50
Pin Configuration
*FS0/REF0 1
VDDHTT 2
X1 3
X2 4
GND 5
*ModeA/HTTCLK0 6
*ModeB/PCICLK8/HTTCLK1 7
PCICLK9/HTTCLK2 8
VDDPCI 9
GND 10
PCICLK11/HTTCLK3 11
PCICLK10 12
PCICLK0 13
PCICLK1 14
GND 15
VDDPCI 16
PCICLK2 17
PCICLK3 18
VDDPCI 19
GND 20
2X_{PCICLK4 21}
2X_{PCICLK5 22}
2X_{PCICLK6 23}
2X_{PCICLK7 24}
48 REF1/FS1*
47 GND
46 VDDREF
45 REF2/FS2*
44 Reset#
43 VDDA
42 GND
41 CPUCLK8T0
40 CPUCLK8C0
39 GND
38 VDDCPU
37 CPUCLK8T1
36 CPUCLK8C1
35 VDDCPU
34 GND
33 GND
32 PD#*
31 48MHz/FS3**
30 GND
29 AVDD48
28 24_48MHz/Sel24_48#*
27 GND
26 SDATA
25 SCLK
48-SSOP
* Internal Pull-Up Resistor
2X _{This Output has 2X Default Drive and can be programmaed lower via IIC}
0802F—04/22/05