AW9110B

May. 2018 V1.2

www.awinic.com.cn

9

Copyright © 2014 SHANGHAI AWINIC TECHNOLOGY CO., LTD

9 FUNCTIONAL DESCRIPTION

AW9110B is a 10 channel co-anode current breathing led driver. There is 256 current levels configurable via

The led drivers and GPIO functions can be switch with configuring register GPMD_A/GPMD_B. The default

status of OUT0~OUT9 are used for GPIO function.

AW9110B supports two types of intelligent breathing modes: BLINK and SMART-FADE. In BLINK mode,

AW9110B completes "fade-on" and "fade off" breathing periodically. In SMART-FADE mode, AW9110B runs

"fade-on" and "fade off" independently with register GPIO_OUTPUT_A/GPIO_OUTPUT_B configuration.

9.1 SHUTDOWN AND RESET

AW9110B enters shutdown mode when SHDN is low level. When SHDN is pulled up from shutdown state,

AW9110B enters standby mode and will be reset to the default state.

AW9110B offers two kinds of reset function：



Power on reset -- 5ms after power on, the chip is reset to the default state.



Hardware reset

– keep SHDN low level over 20 μs, reset all internal circuit.



Software reset -- write 00H to register 7FH, reset all internal circuit.

When AW9110B is reset, the default state of OUTx pin is GPIO.

9.2 LED DIMMING FUNCTION

After power on, OUTx(x=0~9) used for GPIO. AW9110B can switch OUTx to led driver mode with configuring

GPMD_A and GPMD_B, shown in table 4&5.

which means 256 steps dimming range: 0~37mA(default),0~27.75mA, 0~18.5mA or 0~9.25mA. ISEL[1:0]

configuration is refer to table 3.

The dimming level of each channel is configured by DIMx(x=0~9) register. 8-bits DIMx can be configured to

256 levels, from 00H to FFH.

DIMx bit

Dimming level

7

6

5

4

3

2

1

0

0

0

0

0

0

0

0

0

OFF

0

0

0

0

0

0

0

1

0

0

0

0

0

0

1

0

……

……

1

1

1

1

1

1

0

1

1

1

1

1

1

1

1

0

1

1

1

1

1

1

1

1