ICS9250-13 Datasheet, PDF (3/15 Pages) Integrated Circuit Systems – Frequency Generator & Integrated Buffers for PENTIUM/ProTM

ICS9250 - 13
Mode Pin - Power Management Input Control
MODE, Pin 25
(Latched Input)
0
1
Pin 46
CPU_STOP#
(INPUT)
REF1
(OUTPUT)
Pin 15
PCI_STOP#
(INPUT)
PCICLK5
(OUTPUT)
Power Management Functionality
CPU_STOP#
0
1
1
PCI_STOP#
1
1
0
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 and IOAPIC 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 = 3.3V±5%, V_DDL1,2 = 2.5V±5% or 3.3±5%, TA=0 to 70°C
Crystal (X1, X2) = 14.31818MHz
FS3 FS2 FS1 FS0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
CPU
(MHz)
90.00
89.01
88.00
86.99
85.91
85.01
84.00
82.00
81.01
80.00
83.31
68.49
78.00
75.00
71.99
66.82
SDRAM
(MHz)
90.00
89.01
88.00
86.99
85.91
85.01
84.00
82.00
81.01
80.00
83.31
68.49
78.00
75.00
71.99
66.82
PCICLK
(MHz)
45.00
44.51
44.00
43.50
42.95
42.51
42.00
41.00
40.00
41.65
34.24
34.24
39.00
37.50
35.99
33.41
3
REF, IOAPIC
(MHz)
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318