ICS950403 Datasheet, PDF (1/18 Pages) Integrated Circuit Systems – AMD - K8™ System Clock Chip

Integrated
Circuit
Systems, Inc.
ICS950403
Advance Information
AMD - K8™ System Clock Chip
Recommended Application:
AMD K8 System Clock with AMD, VIA or ALI Chipset
Pin Configuration
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).
*FS0/REF0 1
48 REF1/FS1*
VDDREF 2
47 GND
X1 3
46 VDDREF
X2 4
45 REF2/FS2*
GND 5
44 Reset#
~*ModeA/HTTCLK0 6
43 VDDA
~*ModeB/PCICLK7/HTTCLK1 7
42 GND
~PCICLK8/HTTCLK2 8
41 CPUCLK8T0
VDDPCI 9
40 CPUCLK8C0
GND 10
39 GND
~PCICLK9/HTTCLK3 11
38 VDDCPU
PCICLK10 12
37 CPUCLK8T1
PCICLK0 13
36 CPUCLK8C1
PCICLK1 14
35 VDDCPU
GND 15
34 GND
VDDPCI 16
33 GND
~PCICLK2 17
32 PD#*
~PCICLK3 18
31 48MHz/FS3**
VDDPCI 19
30 GND
GND 20
29 AVDD48
PCICLK4 21
28 24_48MHz/Sel24_48#*~
PCICLK5 22
27 GND
~PCICLK_F 23
26 SDATA
~PCICLK6 24
25 SCLK
48-SSOP
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
~ This Output has 2X Drive Strength
Block Diagram
X1
X2
PD#
SDATA
SCLK
FS (3:0)
MODE (A,B)
SEL24_48#
PLL2
XTAL
OSC
PLL1
Spread
Spectrum
Control
Logic
Config.
Reg.
/2
CPU
DIVDER
PCI
DIVDER
Stop
X2
48MHz
24_48MHz
REF (2:0)
CPUCLKC (1:0)
CPUCLKT (1:0)
PCICLK (6:0, 10)
PCICLK_F
PCICLK/HTTCLK (3:1)
HTTCLK0
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
0732—01/27/03
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. Third party brands and names are the property of their respective owners.