w83195bg-120 Winbond Electronics Corp America, w83195bg-120 Datasheet - Page 18

• Manufacturer Part Number: w83195bg-120
• Description: Winbond Clock Generator W83195br-120/w83195bg-120 For Intel 915/945 Chipset
• Manufacturer: Winbond Electronics Corp America

7.16 Register 15: SST Control (Default: ECh)
7.17 Register 16: Skew Control (Default: E4h)
7.18 Note: The skew rate control select bit fit value Please felloe below table
Note: Each unit means 300ps
Note: skew bits only for Winbond internal and BOIS program use; the release version please reserved
these bits.
SKEW bit[2:0]
Unit
BIT
BIT
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
SPSP_TYPE
CSKEW [2]
CSKEW [1]
CSKEW [0]
PSKEW [2]
PSKEW [1]
PSKEW [0]
INV_PCIE
INV_CPU
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
INV_PCI
NAME
NAME
PWD
PWD
1
1
1
0
1
1
0
0
1
1
1
0
0
1
0
0
Invert the CPU phase, 1: Default, 0: Inverse
Reserved
Spread spectrum implementation method
1 : Pendulum type
0 : Original
Reserved
Reserved
Reserved
Reserved
Reserved
Invert the PCIE phase, 1: Default, 0: Inverse
Invert the PCI phase, 1: Default, 0: Inverse
CPU1 to CPU0 skew control, Skew resolution is 300ps
The decision of skew direction is same as CSKEW<2:0> setting
CPU1 to PCI skew control, Skew resolution is 300ps
The decision of skew direction is same as PSKEW [2:0] setting
000
-4
W83195BR-120/W83195BG-120
001
-3
-14-
DESCRIPTION
DESCRIPTION
010
-2
011
-1
100
0
101
1
110
2
TYPE
TYPE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
111
3