ICS9147-01 Datasheet, PDF (3/11 Pages) Integrated Circuit Systems – Frequency Generator & Integrated Buffers for PENTIUMTM

ICS9147- 01
Functionality
PD#
CPU- BUS- FS2*
FS1*
STOP# STOP# (at REF2) (at REF1)
1
1
1
0
0
1
1
1
0
0
1
1
1
0
1
1
1
1
0
1
1
1
1
1
0
1
1
1
1
0
1
1
1
1
1
1
1
1
1
1
0
1
1
X
X
1
0
1
X
X
1
1
0
X
X
FS0
(pin 18)
0
1
0
1
0
1
0
1
X
X
X
CPU (1:4),
SDRM
(1:6)
(MHz)
BUS (1:6)
BUSF
(MHz)
60
30
66.6
33.3
50
25
55
27.5
75
30^a
83.3
33.3^a
REF/2
REF/4
Tristate Tristate
LOW
PLL off
LOW
LOW
running
running
LOW
48MHz
(MHz)
48
48
48
48
48
48
REF/2
Tristate
LOW
PLL off
running
running
24 MHz
(MHz)
24
24
24
24
24
24
REF/4
Tristate
LOW
running
running
REF (1:2),
IOAPIC
(MHz)
14.318
14.318
14.318
14.318
14.318
14.318
REF
Tristate
LOW
Osc Off
running
running
Note a: These frequency selections are at CPU/2.5 (internal VCO/5), not synchronous CPU/2
3