w83193r-04 Winbond Electronics Corp America, w83193r-04 Datasheet - Page 7

• Manufacturer Part Number: w83193r-04
• Description: 83.3 Mhz 3-dimm Clock
• Manufacturer: Winbond Electronics Corp America

8.3.1 Register 0: CPU Frequency Select Register (1 = Enable, 0 = Stopped)
Frequency table selection by software via I
FUNCTION TABLE
SSEL2
BIT
7
6
5
4
3
2
1
0
DESCRIPTION
0
0
0
0
1
1
1
1
TRI-STATE
FUNCTION
NORMAL
@POWERUP
SSEL1
0
0
1
1
0
0
1
1
0
0
0
0
0
0
0
0
SSEL0
See table
0
1
0
1
0
1
0
1
PIN
CPU
-
-
-
-
-
-
-
-
Hi-Z
CPU, SDRAM (MHz)
0 = 1.5% Spread Spectrum Modulation
1 = 0.5% Spread Spectrum Modulation
SSEL2 (Frequency table selection by software via I
SSEL1 (Frequency table selection by software via I
SSEL0 (Frequency table selection by software via I
0 = Selection by hardware
1 = Selection by software I
0 = Spread Spectrum center spread type
1 = Spread Spectrum down spread type
0 = Normal
1 = Spread Spectrum enabled
0 = Running
1 = Tristate all outputs
Preliminary W83193R-02/-04/-04A
See table
2
83.3
68.5
83.3
66.8
C
50
75
75
60
- 7 -
Hi-Z
PCI
OUTPUTS
SDRAM
DESCRIPTION
CPU
Hi-Z
PCI (MHz)
2
C - Bit 6:4
41.65
34.25
33.3
37.5
33.4
25
32
30
Publication Release Date: April 1999
14.318
REF
Hi-Z
REF, IOAPIC (MHz)
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
2
2
2
C)
C)
C)
IOAPIC
14.318
Revision A1
Hi-Z