PCA9685 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 4 — 16 April 2015 21 of 52
NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I
2
C-bus LED controller
Table 7. LED_ON, LED_OFF control registers (address 06h to 45h) bit description
Legend: * default value.
Address Register Bit Symbol Access Value Description
06h LED0_ON_L 7:0 LED0_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED0, 8 LSBs
07h LED0_ON_H 7:5 reserved R
000*
non-writable
4 LED0_ON_H[4] R/W
0*
LED0 full ON
3:0 LED0_ON_H[3:0] R/W
0000*
LEDn_ON count for LED0, 4 MSBs
08h LED0_OFF_L 7:0 LED0_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED0, 8 LSBs
09h LED0_OFF_H 7:5 reserved R
000*
non-writable
4 LED0_OFF_H[4] R/W
1*
LED0 full OFF
3:0 LED0_OFF_H[3:0] R/W
0000*
0Ah LED1_ON_L 7:0 LED1_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED1, 8 LSBs
0Bh LED1_ON_H 7:5 reserved R
000*
non-writable
4 LED1_ON_H[4] R/W
0*
LED1 full ON
3:0 LED1_ON_H[3:0] R/W
0000*
LEDn_ON count for LED1, 4 MSBs
0Ch LED1_OFF_L 7:0 LED1_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED1, 8 LSBs
0Dh LED1_OFF_H 7:5 reserved R
000*
non-writable
4 LED1_OFF_H[4] R/W
1*
LED1 full OFF
3:0 LED1_OFF_H[3:0] R/W
0000*
LEDn_OFF count for LED1, 4 MSBs
0Eh LED2_ON_L 7:0 LED2_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED2, 8 LSBs
0Fh LED2_ON_H 7:5 reserved R
000*
non-writable
4 LED2_ON_H[4] R/W
0*
LED2 full ON
3:0 LED2_ON_H[3:0] R/W
0000*
LEDn_ON count for LED2, 4 MSBs
10h LED2_OFF_L 7:0 LED2_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED2, 8 LSBs
11h LED2_OFF_H 7:5 reserved R
000*
non-writable
4 LED2_OFF_H[4] R/W
1*
LED2 full OFF
3:0 LED2_OFF_H[3:0] R/W
0000*
LEDn_OFF count for LED2, 4 MSBs
12h LED3_ON_L 7:0 LED3_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED3, 8 LSBs
13h LED3_ON_H 7:5 reserved R
000*
non-writable
4 LED3_ON_H[4] R/W
0*
LED3 full ON
3:0 LED3_ON_H[3:0] R/W
0000*
LEDn_ON count for LED3, 4 MSBs
14h LED3_OFF_L 7:0 LED3_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED3, 8 LSBs
15h LED3_OFF_H 7:5 reserved R
000*
non-writable
4 LED3_OFF_H[4] R/W
1*
LED3 full OFF
3:0 LED3_OFF_H[3:0] R/W
0000*
LEDn_OFF count for LED3, 4 MSBs
16h LED4_ON_L 7:0 LED4_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED4, 8 LSBs
17h LED4_ON_H 7:5 reserved R
000*
non-writable
4 LED4_ON_H[4] R/W
0*
LED4 full ON
3:0 LED4_ON_H[3:0] R/W
0000*
LEDn_ON count for LED4, 4 MSBs
