ICS9148-17 Datasheet, PDF (3/15 Pages) Integrated Circuit Systems – Frequency Generator & Integrated Buffers for PENTIUM/ProTM

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)
ICS9148 - 17
Power Management Functionality
CPU_STOP# PCI_STOP#
0
1
1
1
1
0
AGP,
CPUCLK
Outputs
Stopped Low
Running
Running
PCICLK
(0:5)
Running
Running
Stopped Low
PCICLK_F,
REF,
24/48MHz
and SDRAM
Running
Running
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
CPU, SDRAM
(MHz)
1
1
1
100.2
1
1
0
90
1
0
1
83.3
1
0
0
75
0
1
1
75
0
1
0
68.5
0
0
1
66.8
0
0
0
60
PCI
(MHz)
33.4
30
32
32
37.5
34.25
33.4
30
AGP
(MHz)
66.8
60
64
64
75
68.5
66.8
60
REF, IOAPIC
(MHz)
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
3