ICS950401 Datasheet, PDF (1/14 Pages) Integrated Circuit Systems – AMD - K8TM System Clock Chip

Integrated
Circuit
Systems, Inc.
ICS950401
AMD - K8™ System Clock Chip
Recommended Application:
AMD K8 Systems
Output Features:
• 2 - Differential pair push-pull CPU clocks @ 3.3V
• 7 - PCI (Including 1 free running) @3.3V
• 3 - Selectable HT/PCI 66/33MHz @3.3V
• 1 - 48MHz, @3.3V fixed.
• 1 - 24/48MHz @ 3.3V
• 3 - REF @3.3V, 14.318MHz.
Features:
• Up to 220MHz frequency support
• Support power management: PCI stop and stop
clocks controlled by I²C.
• Spread spectrum for EMI reduction
• Uses external 14.318MHz crystal
• I²C programmability features
• Supports Hypes transport technology (HT66 output).
Pin Configuration
*FS0/REF0 1
VDDREF 2
X1 3
X2 4
GND 5
*PCI33/HT66SEL# 6
PCICLK33/HT66_0 7
PCICLK33/HT66_1 8
VDDPCI 9
GND 10
PCICLK33/HT66_2 11
NC 12
PCICLK0 13
PCICLK1 14
GND 15
VDDPCI 16
PCICLK2 17
PCICLK3 18
VDDPCI 19
GND 20
PCICLK4 21
PCICLK5 22
PCICLK_F 23
*PCI_STOP# 24
48 REF1/FS1*
47 GND
46 VDDREF
45 REF2/FS2*
44 SPREAD*
43 VDDA
42 GNDA
41 CPUCLKT0
40 CPUCLKC0
39 GND
38 VDDCPU
37 CPUCLKT1
36 CPUCLKC1
35 VDD
34 GND
33 GNDA
32 VDDA
31 48MHz
30 GND
29 VDD
28 24_48MHz/Sel24_48#*
27 GND
26 SDATA
25 SCLK
48-SSOP/ TSSOP
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
Block Diagram
PLL2
/2
X1
XTAL
X2
OSC
PLL1
Spread
Spectrum
CPU
DIVDER
Stop
SDATA
SCLK
FS (2:0)
PCI33/HT66SEL#
PCI_STOP#
SPREAD
24_48SEL#
Control
Logic
Config.
Reg.
PCI
DIVDER
Stop
X2
48MHz
24_48MHz
REF (2:0)
CPUCLKC (1:0)
CPUCLKT (1:0)
Functionality
PCI33_HT66
FS2 FS1 FS0
SEL#
000
X
001
0
001
1
010
X
011
X
100
X
101
X
110
X
111
X
CPU
Hi-Z
X
X
180.00
220.00
100.00
133.33
166.66
200.00
PCI33
Hi-Z
X/6
X/6
30.00
36.56
33.33
33.33
33.33
33.33
PCI33_HT66 COMMENTS
Hi-Z
X/3
X/6
60.00
73.12
33.33/66.66
33.33/66.66
33.33/66.66
33.33/66.66
Tri-State Mode
Bypass Mode
Bypass Mode
10% under-clk
10% over-clk
Athlon Compatible
Athlon Compatible
Reserved
Hammer Operation
PCICLK (5:0)
PCICLK_F
PCICLK33/HT66(2:0)
0499C—11/01/04