Data Sheet

PCA9685 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved.
Product data sheet Rev. 3 — 2 September 2010 9 of 51
NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I
2
C-bus LED controller
7.3 Register definitions
Table 3. Register summary
Register #
(decimal)
Register #
(hex)
D7 D6 D5 D4 D3 D2 D1 D0 Name Type Function
0 00 00000000MODE1 read/writeMode register 1
1 01 00000001MODE2 read/writeMode register 2
2 02 0 0 0 0 0 0 1 0 SUBADR1 read/write I
2
C-bus subaddress 1
3 03 0 0 0 0 0 0 1 1 SUBADR2 read/write I
2
C-bus subaddress 2
4 04 0 0 0 0 0 1 0 0 SUBADR3 read/write I
2
C-bus subaddress 3
5 05 0 0 0 0 0 1 0 1 ALLCALLADR read/write LED All Call I
2
C-bus
address
6 06 0 0 0 0 0 1 1 0 LED0_ON_L read/write LED0 output and
brightness control byte 0
7 07 0 0 0 0 0 1 1 1 LED0_ON_H read/write LED0 output and
brightness control byte 1
8 08 0 0 0 0 1 0 0 0 LED0_OFF_L read/write LED0 output and
brightness control byte 2
9 09 0 0 0 0 1 0 0 1 LED0_OFF_H read/write LED0 output and
brightness control byte 3
10 0A 0 0 0 0 1 0 1 0 LED1_ON_L read/write LED1 output and
brightness control byte 0
11 0B 0 0 0 0 1 0 1 1 LED1_ON_H read/write LED1 output and
brightness control byte 1
12 0C 0 0 0 0 1 1 0 0 LED1_OFF_L read/write LED1 output and
brightness control byte 2
13 0D 0 0 0 0 1 1 0 1 LED1_OFF_H read/write LED1 output and
brightness control byte 3
14 0E 0 0 0 0 1 1 1 0 LED2_ON_L read/write LED2 output and
brightness control byte 0
15 0F 0 0 0 0 1 1 1 1 LED2_ON_H read/write LED2 output and
brightness control byte 1
16 10 0 0 0 1 0 0 0 0 LED2_OFF_L read/write LED2 output and
brightness control byte 2
17 11 0 0 0 1 0 0 0 1 LED2_OFF_H read/write LED2 output and
brightness control byte 3
18 12 0 0 0 1 0 0 1 0 LED3_ON_L read/write LED3 output and
brightness control byte 0
19 13 0 0 0 1 0 0 1 1 LED3_ON_H read/write LED3 output and
brightness control byte 1
20 14 0 0 0 1 0 1 0 0 LED3_OFF_L read/write LED3 output and
brightness control byte 2
21 15 0 0 0 1 0 1 0 1 LED3_OFF_H read/write LED3 output and
brightness control byte 3