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Integrated Circuit Systems - AMD - K8 System Clock Chip

Numéro de référence ICS950402
Description AMD - K8 System Clock Chip
Fabricant Integrated Circuit Systems 
Logo Integrated Circuit Systems 





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ICS950402 fiche technique
Integrated
Circuit
Systems, Inc.
ICS950402
AMD - K8™ System Clock Chip
Recommended Application:
AMD K8 System Clock with AMD or VIA Chipset
Pin Configuration
Output Features:
• 2 - Differential pair push-pull CPU clocks @
3.3V
• 9 - PCICLK (Including 1 free running) @3.3V
*FS0/REF0 1
VDDREF 2
X1 3
X2 4
GND 5
48 REF1/FS1*
47 GND
46 VDDREF
45 REF2/FS2*
44 Reset#
• 4 - Selectable PCICLK/HTTCLK @3.3V
• 1 - 48MHz, @3.3V fixed.
• 1 - 24/48MHz @ 3.3V
• 3 - REF @3.3V, 14.318MHz.
Features:
• Programmable output frequency.
*(PCICLK7/HTTCLK0)ModeA 6
*PCICLK8/HTTCLK1/ModeB 7
PCICLK9/HTTCLK2 8
VDDPCI 9
GND 10
PCICLK10/HTTCLK3 11
PCICLK11 12
43 VDDA
42 GND
41 CPUCLK8T0
40 CPUCLK8C0
39 GND
38 VDDCPU
37 CPUCLK8T1
• Programmable output divider ratios.
PCICLK0 13
36 CPUCLK8C1
• Programmable output rise/fall time.
• Programmable output skew.
• Programmable spread percentage for EMI
control.
• Watchdog timer technology to reset system
if system malfunctions.
PCICLK1 14
GND 15
VDDPCI 16
****PCICLK2 17
****PCICLK3 18
VDDPCI 19
GND 20
35 VDDCPU
34 GND
33 GND
32 VDD
31 48MHz/FS3**
30 GND
29 AVDD48
• Programmable watch dog safe frequency.
• Support I2C Index read/write and block read/
write operations.
PCICLK4 21
PCICLK5 22
~*PCICLK_F/ModeC 23
28 24_48MHz/Sel24_48#*~
27 GND
26 SDATA
• Uses external 14.318MHz crystal.
• Supports Hyper Transport Technology (HTTCLK).
~*(PCICLK6)PCI_STOP# 24
25 SCLK
48-Pin TSSOP/SSOP
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
~ This Output has 2X Drive Strength
**** This Output has 2.3X Drive Strength
Block Diagram
Functionality
PLL2
X1 XTAL
X2 OSC
/2
PLL1
Spread
Spectrum
CPU
DIVDER
Stop
SDATA
SCLK
FS (3:0)
MODE (A,B,C)
PCI_STOP#
24_48SEL#
Control
Logic
Config.
Reg.
PCI
DIVDER
Stop
X2
48MHz
24_48MHz
REF (2:0)
CPUCLKC (1:0)
CPUCLKT (1:0)
PCICLK (6:0, 11)
PCICLK_F
PCICLK/HTTCLK (3:0)
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
0700B—04/30/04
Downloaded from Elcodis.com electronic components distributor

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