ICS9148-37 Datasheet, PDF (3/16 Pages) Integrated Circuit Systems – Frequency Generator & Integrated Buffers for PENTIUM/Pro

ICS9148 - 37
Mode Pin - Power Management Input Control
MODE, Pin 25
(Latched Input)
0
1
Pin 17
CPU_STOP#
(INPUT)
SDRAM 11
(OUTPUT)
Pin 18
PCI_STOP#
(INPUT)
SDRAM 10
(OUTPUT)
Power Management Functionality
CPU_STOP#
0
PCI_STOP#
1
AGP,
CPUCLK
Outputs
PCICLK (0:5)
PCICLK_F,
REF,
24/48MHz
and SDRAM
Stopped Low Running
Running
1
1
Running
Running
Running
1
0
Running Stopped Low Running
Crystal
OSC
Running
Running
Running
VCO
Running
Running
Running
CPU 3.3#_2.5V Buffer selector for CPUCLK drivers.
CPU3.3#_2.5
Input level
(Latched Data)
1
0
Buffer Selected
for operation at:
2.5V VDD
3.3V VDD
Functionality
V_DD1, 2, 3, 4 = 3.3V±5%, V_DDL = 2.5V ±5% or 3.3 ±5%, TA= 0 to 70°C
Crystal (X1, X2) = 14.31818MHz
FS2 FS1 FS0
1
1
1
1
1
0
1
0
1
1
0
0
0
1
1
0
1
0
0
0
1
0
0
0
CPU
(MHz)
100
95.25
83.3
75
75
68.5
66.8
60
SDRAM (MHz)
SD_SEL=1
SD_SEL=0
100
66.6
95.25
63.5
83.3
66.6
75
60
75
75
68.5
68.5
66.8
66.8
60
60
PCI (MHz)
33.3
31.75
33.3
30
37.5
34.25
33.4
30
AGP (MHz)
66.6
63.5
66.6
60
75
68.5
66.8
60
0143G—08/04/04
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