PCA9685_2 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 02 — 16 July 2009 9 of 50
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/write Mode register 1
1 01 00000001MODE2 read/write Mode register 2
2 02 00000010SUBADR1 read/write I
2
C-bus subaddress 1
3 03 00000011SUBADR2 read/write I
2
C-bus subaddress 2
4 04 00000100SUBADR3 read/write I
2
C-bus subaddress 3
5 05 00000101ALLCALLADR read/write LED All Call I
2
C-bus
address
6 06 00000110LED0_ON_L read/write LED0 output and
brightness control byte 0
7 07 00000111LED0_ON_H read/write LED0 output and
brightness control byte 1
8 08 00001000LED0_OFF_L read/write LED0 output and
brightness control byte 2
9 09 00001001LED0_OFF_H read/write LED0 output and
brightness control byte 3
10 0A 00001010LED1_ON_L read/write LED1 output and
brightness control byte 0
11 0B 00001011LED1_ON_H read/write LED1 output and
brightness control byte 1
12 0C 00001100LED1_OFF_L read/write LED1 output and
brightness control byte 2
13 0D 00001101LED1_OFF_H read/write LED1 output and
brightness control byte 3
14 0E 00001110LED2_ON_L read/write LED2 output and
brightness control byte 0
15 0F 00001111LED2_ON_H read/write LED2 output and
brightness control byte 1
16 10 00010000LED2_OFF_L read/write LED2 output and
brightness control byte 2
17 11 00010001LED2_OFF_H read/write LED2 output and
brightness control byte 3
18 12 00010010LED3_ON_L read/write LED3 output and
brightness control byte 0
19 13 00010011LED3_ON_H read/write LED3 output and
brightness control byte 1
20 14 00010100LED3_OFF_L read/write LED3 output and
brightness control byte 2
21 15 00010101LED3_OFF_H read/write LED3 output and
brightness control byte 3
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