w83194br-b Winbond Electronics Corp America, w83194br-b Datasheet - Page 17

• Manufacturer Part Number: w83194br-b
• Description: Winbond Clock Generator For Intel P4 845 Series Chipset
• Manufacturer: Winbond Electronics Corp America

7.11 Register 10: Divisor and Step-less Enable and Skew Control Register
Table of CPU, 3V66, and PCI clock ratio selection.
7.12 Register 11: C Winbond Chip ID Register (Read Only)
REG11 BIT5
BIT
BIT
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
SEL2
0
0
0
0
1
1
1
1
CPU_3V66_SKEW [2]
CPU_3V66_SKEW [1]
CPU_3V66_SKEW [0]
EN_MN_PROG
RATIO_SEL [2]
RATIO_SEL [1]
RATIO_SEL [0]
CHPI_ID [7]
CHPI_ID [6]
CHPI_ID [5]
CHPI_ID [4]
CHPI_ID [3]
CHPI_ID [2]
CHPI_ID [1]
CHPI_ID [0]
NAME
NAME
Test2
CLOCK GEN. FOR INTEL P4 845 SERIES CHIPSET
REG11 BIT4
SEL1
0
0
1
1
0
0
1
1
PWD
PWD
REG11 BIT3
0
0
1
1
0
0
1
0
X
X
X
X
0
1
0
0
SEL0
0
1
0
1
0
1
0
1
0: use frequency table
1: use M/N register to program frequency
The equation is VCO freq. = 14.318MHz * (N+4)/ M. When
the watchdog timer is timeout, this will be clear. In this time,
the frequency is set to hardware default latched or safe
frequency set by EN_SFAE_FREQ (Register 0 bit 0).
Test bit 2. Winbond test bit, do not change them.
CPU, 3V66, and PCI ratio selection. The ratio is shown as
following table.
CPU to 3V66 skew.
Winbond Chip ID. W83194BR-B is 0x32.
Winbond Chip ID.
Winbond Chip ID.
Winbond Chip ID.
Winbond Chip ID.
Winbond Chip ID.
Winbond Chip ID.
Winbond Chip ID.
- 13 -
VCO / CPU
W83194BR-B/W83194BG-B
RATIO
2
2
3
4
6
6
3
3
DESCRIPTION
DESCRIPTION
Publication Release Date: October 2006
VCO / 3V66
RATIO
10
5
6
6
6
6
5
5
VCO / PCI
RATIO
Revision 3.1
10
12
12
12
12
20
10
10