W83L785R Datasheet, PDF (29/38 Pages) Winbond – WINBOND H/W MONITORING IC FOR NOTEBOOK

W83L785R/W83L785G
7.23 PWM 1 Pre-Scale Register  Index 80h
Power on default [7:0] = 0000, 0001 b
BIT
NAME
READ/WRIT
E
DESCRIPTION
7 PWM_CLK_SEL1 Read/Write PWM 1 Input Clock Select. This bit select PWM 1
input clock.
0: 1 MHz
1: 125 KHz
6-0 PRE_SCALE1[6:0] Read/Write
PWM 1 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 bypass
01h : divider is 1
02h : divider is 2
:
:
PWM output frequency is (Pre-scale frequency) / 256 .
125KHz
For example, if setting this register 81h, the pin FANOUT0 output frequency =
1 _{= 488 Hz}
256
7.24 PWM 1 Duty Cycle Select Register  81h
Power on default [7:0] 1111, 1111 b
BIT
NAME
READ/WRIT
E
DESCRIPTION
7-0 PWM1_DC[7:0]
Read/Write
PWM 1 Duty Cycle. This 8-bit register determines the
number of input clock cycles, out of 256-cycle period,
during which the PWM output is high.
00h: PWM output is always logical Low.
FFh: PWM output is always logical High.
XXh: PWM output logical High percentage is
(XX/256*100%) during one cycle.
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Publication Release Date: Apr. 2006
Revision 1.1