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 23 of 52
NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I
2
C-bus LED controller
2Ah LED9_ON_L 7:0 LED9_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED9, 8 LSBs
2Bh LED9_ON_H 7:5 reserved R
000*
non-writable
4 LED9_ON_H[4] R/W
0*
LED9 full ON
3:0 LED9_ON_H[3:0] R/W
0000*
LEDn_ON count for LED9, 4 MSBs
2Ch LED9_OFF_L 7:0 LED9_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED9, 8 LSBs
2Dh LED9_OFF_H 7:5 reserved R
000*
non-writable
4 LED9_OFF_H[4] R/W
1*
LED9 full OFF
3:0 LED9_OFF_H[3:0] R/W
0000*
LEDn_OFF count for LED9, 4 MSBs
2Eh LED10_ON_L 7:0 LED10_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED10, 8 LSBs
2Fh LED10_ON_H 7:5 reserved R
000*
non-writable
4 LED10_ON_H[4] R/W
0*
LED10 full ON
3:0 LED10_ON_H[3:0] R/W
0000*
LEDn_ON count for LED10, 4 MSBs
30h LED10_OFF_L 7:0 LED10_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED10, 8 LSBs
31h LED10_OFF_H 7:5 reserved R
000*
non-writable
4 LED10_OFF_H[4] R/W
1*
LED10 full OFF
3:0 LED10_OFF_H[3:0] R/W
0000*
LEDn_OFF count for LED10, 4 MSBs
32h LED11_ON_L 7:0 LED11_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED11, 8 LSBs
33h LED11_ON_H 7:5 reserved R
000*
non-writable
4 LED11_ON_H[4] R/W
0*
LED11 full ON
3:0 LED11_ON_H[3:0] R/W
0000*
LEDn_ON count for LED11, 4 MSBs
34h LED11_OFF_L 7:0 LED11_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED11, 8 LSBs
35h LED11_OFF_H 7:5 reserved R
000*
non-writable
4 LED11_OFF_H[4] R/W
1*
LED11 full OFF
3:0 LED11_OFF_H[3:0] R/W
0000*
LEDn_OFF count for LED11, 4 MSBs
36h LED12_ON_L 7:0 LED12_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED12, 8 LSBs
37h LED12_ON_H 7:5 reserved R
000*
non-writable
4 LED12_ON_H[4] R/W
0*
LED12 full ON
3:0 LED12_ON_H[3:0] R/W
0000*
LEDn_ON count for LED12, 4 MSBs
38h LED12_OFF_L 7:0 LED12_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED12, 8 LSBs
39h LED12_OFF_H 7:5 reserved R
000*
non-writable
4 LED12_OFF_H[4] R/W
1*
LED12 full OFF
3:0 LED12_OFF_H[3:0] R/W
0000*
LEDn_OFF count for LED12, 4 MSBs
3Ah LED13_ON_L 7:0 LED13_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED13, 8 LSBs
3Bh LED13_ON_H 7:5 reserved R
000*
non-writable
4 LED13_ON_H[4] R/W
0*
LED13 full ON
3:0 LED13_ON_H[3:0] R/W
0000*
LEDn_ON count for LED13, 4 MSBs
Table 7. LED_ON, LED_OFF control registers (address 06h to 45h) bit description …continued
Legend: * default value.
Address Register Bit Symbol Access Value Description