W83194AR-WE Datasheet, PDF (6/16 Pages) Winbond – 200MHZ CLOCK FOR WHITNEY CHIPSET

W83194AR-We
6.0 SERIAL CONTROL 0REGISTERS
PRELIMINARY
The Pin column lists the affected pin number and the @PowerUp column gives the state at true
power up. Registers are set to the values shown only on true power up. "Command Code" byte and
"Byte Count" byte must be sent following the acknowledge of the Address Byte. Although the data
(bits) in these two bytes are considered "don't care", they must be sent and will be acknowledge.
After that, the below described sequence (Register 0, Register 1, Register 2, ....) will be valid and
acknowledged.
Frequency Table Setting by I2C (SEL5 ~ SEL0)
SSE SS SS SS SS SS
L5 EL4 EL3 EL2 EL1 EL0
CPU
(MHz)
SDRAM CPU/S
(MHz) DRAM
3V66
(MHz)
PCI(M
Hz)
IOAPIC (MHz)
APIC_SEL=1
IOAPIC (MHz)
APIC_SEL=0
0000
0
0
83.3 124.95 2/3 83.30 41.65
0000
0
1
90
90
1
60.00 30.00
0000
1
0
75
112.5 2/3 75.00 37.50
0000
1
1
72
108
2/3 72.00 36.00
0001
0
0 89.07 133.6
2/3 89.07 44.53
0001
0
1 95.25 95.25
1
63.50 31.75
0001
1
0
121
121
1
80.67 40.33
0001
1
1
124
124
1
82.67 41.33
0010
0
0
119
119
1
79.33 39.67
0010
0
1
114
114
1
76.00 38.00
0010
1
0
110
110
1
73.33 36.67
0010
1
1
105
105
1
70.00 35.00
00110
0
66.8 100.2 2/3 66.80 33.40
0011
0
1 100.2 100.2
1
66.80 33.40
0011
1
0 133.6 133.6
1
66.80 33.40
0011
1
1 133.6 100.2
4/3 66.80 33.40
01000
0
135 101.25 4/3 67.50 33.75
0100
0
1
125
125
1
83.33 41.67
0100
1
0
127
127
1
84.67 42.33
0100
1
1
130
130
1
86.67 43.33
0101
0
0
140
140
1
70.00 35.00
0101
0
1
136
136
1
68.00 34.00
0101
1
0
166 166.00 1
83.00 41.50
0101
1
1
155
155
1
77.50 38.75
0110
0
0
150 112.5 4/3 75.00 37.50
0110
0
1
117
117
1
78.00 39.00
0110
1
0
107
107
1
71.33 35.67
0110
1
1 100.9 100.9
1
67.27 33.63
0111
0
0
145 108.75 4/3 72.50 36.25
0111
0
1
140
105
4/3 70.00 35.00
0111
1
0
138 103.5 4/3 69.00 34.50
0111
1
1
137 102.75 4/3 68.50 34.25
20.83
15.00
18.75
18.00
22.27
15.88
20.17
20.67
19.83
19.00
18.33
17.50
16.70
16.70
16.70
16.70
16.88
20.83
21.17
21.67
17.50
17.00
20.75
19.38
18.75
19.50
17.83
16.82
18.13
17.50
17.25
17.13
41.65
30.00
37.50
36.00
44.53
31.75
40.33
41.33
39.67
38.00
36.67
35.00
33.40
33.40
33.40
33.40
33.75
41.67
42.33
43.33
35.00
34.00
41.50
38.75
37.50
39.00
35.67
33.63
36.25
35.00
34.50
34.25
Publication Release Date: Nov. 1999
-6-
Revision 0.50