W83791G Datasheet, PDF (68/99 Pages) Winbond – Winbond H/W Monitoring IC

W83791D/G
7.81 FAN4_PRE_SCALE register ⎯ Index 9Eh (Bank 0)
Power on default: 01h
BIT
NAME
ATTRIBUTE
DESCRIPTION
7 PWM_CLK_SEL4
R/W
PWM 4 Input Clock Select. This bit select Fan 4 input
clock to pre-scale divider.
0: 3 MHz
1: 125 KHz
6:0 PRE_SCALE4
[6:0]
R/W
Fan 4 Input Clock Pre-Scale. The divider of input
clock is the number defined by pre-scale. Thus, writing
0 transfers the input clock directly to counter. The
maximum divider is 128 (7Fh).
00h : divider is 1
01h : divider is 2
02h : divider is 3
:
:
PWM frequency = (Input clock / pre-scale) / 256
7.82 FAN5_PRE_SCALE register ⎯ Index 9Fh (Bank 0)
Power on default: 01h
BIT
NAME
ATTRIBUTE
DESCRIPTION
7 PWM_CLK_SEL5 Read /Write PWM 5 Input Clock Select. This bit select Fan 5 input
clock to pre-scale divider.
0: 3 MHz
1: 125 KHz
6:0 PRE_SCALE5[6:0] Read /Write
Fan 5 Input Clock Pre-Scale. The divider of input
clock is the number defined by pre-scale. Thus, writing
0 transfers the input clock directly to counter. The
maximum divider is 128 (7Fh).
00h : divider is 1
01h : divider is 2
02h : divider is 3
:
:
PWM frequency = (Input clock / pre-scale) / 256
- 62 -
Publication Release Date: April 14, 2006
Revision 1.1