RT4832A
Register Map
RT4832A IC slave address = 7’b 0010001. I2C interface supports fast mode (bit rate up to 400kb/s).
Default
(Reset Value)
Address
Address Name
Vendor Code
BLED OVP
BIT
1:0
7:5
R/W
R
Description
0x01
10
10 RICHTEK
[000] = 18V, [001] = 22V, [010] = 25V, [011] = 29V,
[100] = 33V, [101 to 111] = 36V
R/W
001
1
BLED
Mapping Code
4
3
R/W
R/W
[0] = Exponential, [1] = Linear.
0x02
BLED
PWM Config.
0
[0] = Active High, [1] = Active Low.
Reserved
2:0
7
R/W
R/W
000
0
BL SW Frequency
[0] = 500kHz, [1] = 1MHz
[0000] = 0s, [0001] = 500s, [0010] = 750s,
[0011] = 1ms, [0100] = 2ms, [0101] = 5ms, [0110] =
10ms, [0111] = 20ms, [1000] = 50ms, [1001] =
100ms, [1010] = 250ms, [1011] = 800ms, [1100] =
1s, [1101] = 2s, [1110] = 4s, [1111] = 8s
BL Ramp Rate
6:3
R/W
0011
0x03
Reserved
Bled11th
2:1
0
R/W
R/W
00
1
11th bit enable of bled brightness control
[0] = 10 bit brightness control, reg0x40[1] is MSB,
reg0x04[2] is ignore.
[1] = 11 bit brightness control, reg0x40[2] is MSB.
Reserved
11th LSB
7:3
2
R/W
R/W
00000
1
0x04
0x05
BLED Brightness
MSB
1:0
7:0
R/W
R/W
11
1024 steps, MSB
1024 steps, LSB
BLED Brightness
LSB
11111111
[0000] = 25mA, [0001] = 50mA, [0010] = 75mA,
[0011] = 100mA, [0100] = 125mA, [0101] = 150mA,
[0110] = 175mA, [0111] = 200mA, [1000] = 225mA,
[1001] = 250mA, [1010] = 275mA, [1011] = 300mA,
[1100] = 325mA, [1101] = 350mA, [1110 to 1111] =
375mA
FLED LED1/2 Torch
Current
7:4
3:0
R/W
R/W
0011
1110
0x06
[0000] = 100mA, [0001] = 200mA, [0010] = 300mA,
[0011] = 400mA, [0100] = 500mA, [0101] = 600mA,
[0110] = 700mA, [0111] = 800mA, [1000] = 900mA,
[1001] = 1000mA, [1010] = 1100mA, [1011] =
1200mA, [1100] = 1300mA, [1101] = 1400mA,
[1110 to 1111] = 1500mA
FLED LED1/2 Strobe
Current
Copyright © 2017 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
12
DS4832A-00 January 2017
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
