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RC7144
PRODUCT SPECIFICATION
10
P
Table 4. Select Function for Data Byte 0, Bits 0:1
Table 5. Frequency Selection Table Through I
2
C Programming
Table 6. Test Mode
Note:
1. See table 5 for frequency selection.
Function
Normal Operation
Spread Spectrum
Tristate
Input Conditions
Data Byte 0
Bit 1
0
1
1
Output Conditons
CPU
NOTE 1
±0.5%
Hi-Z
PC1
NOTE 1
±0.5%
Hi-Z
IOAPIC
REF0:1
14.318 M
14.318 M
Hi-Z
48 MHz
48 M
48 M
Hi-Z
24 MHz
24 M
24 M
Hi-Z
Bit 0
0
0
1
Input Conditons
Data Byte 0, Bit 3 = 1
Bit 6
FS2
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
CPU (MHz)
133.3
124
150
140
105
110
115
120
100
133.3
112
103
66.8
83.3
75
124
PCI (MHz)
33.3
31
37.5
35
35
36.7
38.3
40
33.3
44.43
37.3
34.3
33.4
41.7
37.5
41.3
Bit 2
FS3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
Bit 5
FS1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
Bit 4
FS0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Function
Normal
Test Mode
Input Condition Data Byte4
1
0
CPU
Note 1
X1
PCI
Note 1
CPU/2 or 3
REF, IOAPIC
14.318
X1
48MHz
48
X1/2
24MHz
24
X1/4