W83194R-81 Datasheet, PDF (5/18 Pages) Winbond – 100MHZ CLOCK FOR SIS CHIPSET

W83194R-81
5.5 Power Pins
SYMBOL
Vdd
Vddq2
Vddq2b
Vddq3
Vddq4
Vss
PRELIMINARY
PIN
1
48
42
19, 30, 36
6,14
3,9,16,22,27,
33,39,45
FUNCTION
Power supply for REF0 crystal and core logic.
Power supply for REF1,IOAPIC output, 2.5V.
Power supply for REF2, CPUCLK[0:2], either 2.5V or
3.3V.
Power supply for SDRAM and 48/24MHz outputs.
Power supply for PCICLK outputs.
Circuit Ground.
6.0 FREQUENCY SELECTION BY HARDWARE
SD_SEL
FS2
FS1
FS0
CPU
(MHz)
SDRAM
(MHz)
0
0
0
0
66.70
100.05
0
0
0
1
90
90
0
0
1
0
95.25
63.4
0
0
1
1
100.2
66.8
0
1
0
0
100
75
0
1
0
1
112
74.7
0
1
1
0
124
82.7
0
1
1
1
133.3
88.9
1
0
0
0
66.8
66.8
1
0
0
1
75
75
1
0
1
0
83.3
83.3
1
0
1
1
95.25
95.25
1
1
0
0
100.2
100.2
1
1
0
1
112
112
1
1
1
0
124
124
1
1
1
1
133.3
133.3
PCI
(MHz)
33.35
30
31.7
33.4
30
37.3
31
33.3
33.4
30
33.32
31.7
33.4
37.3
31
33.3
REF (MHz)
IOAPIC
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
Publication Release Date: Dec. 1998
-5-
Revision 0.20