w83194br-372 Winbond Electronics Corp America, w83194br-372 Datasheet - Page 15

• Manufacturer Part Number: w83194br-372
• Description: Clock Generator For Sis 746/748 Chipsets
• Manufacturer: Winbond Electronics Corp America

7.14 Register 13: FIX Mode Control (Default: 0Fh)
7.15 Register 14: Fix Mode Control (Default: 2Ch)
BIT
BIT
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
INV_USB48
ASKEW [2]
ASKEW [1]
ASKEW [0]
SPCNT [5]
SPCNT [4]
SPCNT [3]
SPCNT [2]
SPCNT [1]
SPCNT [0]
FIX_ZCLK
Reserved
Fix_AGP
FIX_PCI
SPSP1
SPSP0
NAME
NAME
PWD
PWD
0
0
0
0
1
0
1
1
0
0
0
0
1
1
1
1
PCI output frequency select mode
(Valid only when SEL<2:0> is nonzero)
0: Output frequency according to frequency selection table
1: Output frequency according to FIX frequency table
ZCLK output frequency select mode
(Valid only when SEL<2:0> is nonzero)
0: Output frequency according to frequency selection table
1: Output frequency according to FIX frequency table
Spread Spectrum Programmable time, the resolution is 280ns. Default
period is 11.8us
AGP output frequency select mode
0: Output frequency according to frequency selection table
1: Output frequency according to FIX frequency table
Invert the USB48 phase,
0: In phase with USB24_48
1: 180 degrees out of phase
Reserved
Spread Spectrum type select.
CPU to AGP skew control, Skew resolution is 340ps
Expand the skew direction is same as
CPU_AGP_SKEW [2:0] setting
00 : Down
01 : Down
10 : Center +/- 0.5%
11 : Center +/- 0.25%
0.5%
- 12 -
1%
DESCRIPTION
DESCRIPTION
W83194BR-372