ISL97635IRZ datasheet(20/28 Pages) RENESAS

20 / 28 page

ISL97635

FN6434 Rev.3.00

Page 20 of 28

Sep 26, 2017

BL_STAT of Register 0x02 is 1 and Register 0x09 is not 0. Refer

to Figures 24 and 25.

• A value of 0 written to BL_CTL immediately turns off the BL. The BL

is deemed to be off when Bit 3 BL_STAT of Register 0x02 is 0 and

• **Note that the behavior of Register 0x00 (Brightness Control

bits, as shown in Table 3.

FIGURE 24. DESCRIPTIONS OF BRIGHTNESS CONTROL REGISTER

PWM BRIGHTNESS CONTROL REGISTER

BRT7

BRT6

BRT5

BRT4

BRT3

BRT2

BRT1

BRT0

Bit 7 (R/W)

Bit 6 (R/W)

Bit 5 (R/W)

Bit 4 (R/W)

Bit 3 (R/W)

Bit 2 (R/W)

Bit 1 (R/W)

Bit 0 (R/W)

BIT ASSIGNMENT

BIT FIELD DEFINITIONS

BRT[7..0]

= 256 steps of PWM brightness levels

FIGURE 25. DESCRIPTIONS OF DEVICE CONTROL REGISTER

DEVICE CONTROL REGISTER

RESERVED

PWM_MD

PWM_SEL

BL_CTL

Bit 7 (R/W)

Bit 6 (R/W)

Bit 5 (R/W)

Bit 4 (R/W)

Bit 3 (R/W)

Bit 2 (R/W)

Bit 1 (R/W)

Bit 0 (R/W)

BIT ASSIGNMENT

BIT FIELD DEFINITIONS

PWM_MD

= PWM mode select bit (1 = absolute brightness, 0 =

% change) default = 0

PWM_SEL

= Brightness control select bit (1 = control by PWMI,

0 = control by SMBus) default = 0

BL_CTL

= BL On/Off (1 = On, 0 = Off) default = 0

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