W83194R-630_07 Datasheet, PDF (10/15 Pages) Winbond – 166MHZ CLOCK FOR SIS CHIPSET

W83194R-630/-630A
8.2.2 Register 0: CPU Frequency Select Register (default = 0)
BIT @POWERUP
PIN
DESCRIPTION
7
0
6
0
5
0
4
0
0 = ±0.5% Center type Spread Spectrum Modulation
-
1 = ±0.75% Center type Spread Spectrum Modulation
-
SSEL2 (for frequency table selection by software via I²C)
-
SSEL1 (for frequency table selection by software via I²C)
-
SSEL0 (for frequency table selection by software via I²C)
3
0
2
0
0 = Selection by hardware
-
1 = Selection by software I²C - Bit 2, 6:4
-
SSEL3 (for frequency table selection by software via I²C)
1
0
0 = Normal
-
1 = Spread Spectrum enabled
0
0
0 = Running
-
1 = Tristate all outputs
8.2.3 Register 1 : CPU Clock Register (1 = Active, 0 = Inactive)
BIT @POWERUP
7
x
6
1
5
1
4
1
3
1
2
1
1
1
0
1
PIN
DESCRIPTION
- Latched FS2#
- Reserved
0 = 0.5% down type spread, overrides Byte0-bit7.
-
1= Center type spread.
- Reserved
43 CPUCLK2 (Active / Inactive)
45 CPUCLK1 (Active / Inactive)
46 CPUCLK0 (Active / Inactive)
- Reserved
- 10 -