ICS9148F-03 ICST [Integrated Circuit Systems], ICS9148F-03 Datasheet - Page 3

• Manufacturer Part Number: ICS9148F-03
• Description: Frequency Generator & Integrated Buffers for PENTIUM/ProTM
• Manufacturer: ICST [Integrated Circuit Systems]

CPU_STOP#
FS2
CPU3.3#_2.5
0
0
0
0
1
1
1
1
SSEN#
Input level
Pin 23
(Latched Input)
MODE, Pin 25
0
1
1
0
0
1
1
1
0
FS1
0
0
1
1
0
0
1
1
0
1
PCI_STOP#
FS0
SS_Type
0
1
0
1
0
1
0
1
Pin 24
Buffer Selected for
1
1
0
0
1
0
1
operation at:
SDRAM(MHz)
2.5V VDD
3.3V VDD
CPU,
50.0
75.0
83.3
68.5
83.3
75.0
60.0
66.8
Stopped Low
CPUCLK
CPU_STOP#
Frequency Modulated Center Spread Mode
Outputs
Running
Running
Frequency Modulated Down Spread Mode
(OUTPUT)
(INPUT)
Pin 46
REF1
Normal, Steady Frequency Mode
(will lower average frequency)
41.65 (1/2 CPU)
34.25 (1/2 CPU)
25.0 (1/2 CPU)
37.5 (1/2 CPU)
30.0 (1/2 CPU)
33.4 (1/2 CPU)
and PCICLOCKS
PCICLK
CPU, SDRAM
(MHz)
Stopped Low
Not Allowed
33.3
PCICLK
32
Running
Running
(0:5)
PCI_STOP#
(OUTPUT)
REF, IOAPIC
PCICLK5
(INPUT)
and SDRAM
PCICLK_F,
Pin 15
24/48MHz
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
(MHz)
Running
Running
Running
REF,
REF, IOAPIC
14.318MHz
14.318MHz
14.318MHz
14.318MHz
Running
Running
Running
Crystal
OSC
Running
Running
Running
24MHz
VCO
24MHz
24MHz
24MHz
24MHz
48MHz
48MHz
48MHz
48MHz
48MHz