8

RT4532

www.richtek.com

DS4532-01 August 2015

©

Copyright 2015 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Table 1. Register Map

Slave Address = 0100010x

Address

Address

Name

BIT

LABEL

Default

(Reset Value)

Description

0x00

Device ID

7:0

DEV_ID

0x01

Manufacture

7:2

REV

000000

Revision number

1:0

VID

11

Vendor ID : Richtek

0x02

Config1

7

OVPsel

1

OVP threshold ([0] 16V, [1] 24V)

6

PWM_EN

1

PWM enable : [0] Ignored, [1] Enable

5

PWM _SET

0

PWM active setup : [0] High active, [1] Low

active

4

Reserved

3

MAX_Current

0

[0] 20mA, [1] 40mA,

2

LED1_EN

1

Backlight LED1 : [0] OFF, [1] ON

1

LED2_EN

1

Backlight LED2 : [0] OFF, [1] ON

0

DEV_EN

1

CHIP enable : [0] OFF, [1] ON

0x03

Timing

7

RST_SW

0

Software reset : [0] Disable(Auto), [1] Reset all

registers

6

FSW

1

Switching frequency ([0]550kHz, [1]1.1MHz)

5:3

UP_RATE

000

Brightness ramp-up rate : [000] 32

s, [001]

4.096ms, [010] 8.192ms, [011] 16.383ms, [100]

32.768ms, [101] 65.536ms, [110] 131.072ms,

[111] 262.144ms

2:0

DN_RATE

000

Brightness ramp-down rate : [000] 32

s, [001]

4.096ms, [010] 8.192ms, [011] 16.383ms, [100]

32.768ms, [101] 65.536ms, [110] 131.072ms,

[111] 262.144ms

0x04

Linear

Brightness

Control

7:0

BRIGHT_LIN

00000000

[00000000] 0.39%, [00000001] 0.39%,

……

[111111111] 100%

0x05

FLAG

7:4

Reserved

0

3

LED1_FT

0

LED1 short : [0] Normal, [1] Fault

2

LED2_FT

0

LED2 short : [0] Normal, [1] Fault

1

OVP

0

Output over voltage : [0] Normal, [1] Fault

0

OTP

0

Over temperature : [0] Normal, [1] Fault