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 21 of 51
NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I
2
C-bus LED controller
18h LED4_OFF_L 7:0 LED4_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED4, 8 LSBs
19h LED4_OFF_H 7:5 reserved R
000*
non-writable
4 LED4_OFF_H[4] R/W
1*
LED4 full OFF
3:0 LED4_OFF_H[3:0] R/W
0000*
LEDn_OFF count for LED4, 4 MSBs
1Ah LED5_ON_L 7:0 LED5_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED5, 8 LSBs
1Bh LED5_ON_H 7:5 reserved R
000*
non-writable
4 LED5_ON_H[4] R/W
0*
LED5 full ON
3:0 LED5_ON_H[3:0] R/W
0000*
LEDn_ON count for LED5, 4 MSBs
1Ch LED5_OFF_L 7:0 LED5_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED5, 8 LSBs
1Dh LED5_OFF_H 7:5 reserved R
000*
non-writable
4 LED5_OFF_H[4] R/W
1*
LED5 full OFF
3:0 LED5_OFF_H[3:0] R/W
0000*
LEDn_OFF count for LED5, 4 MSBs
1Eh LED6_ON_L 7:0 LED6_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED6, 8 LSBs
1Fh LED6_ON_H 7:5 reserved R
000*
non-writable
4 LED6_ON_H[4] R/W
0*
LED6 full ON
3:0 LED6_ON_H[3:0] R/W
0000*
LEDn_ON count for LED6, 4 MSBs
20h LED6_OFF_L 7:0 LED6_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED6, 8 LSBs
21h LED6_OFF_H 7:5 reserved R
000*
non-writable
4 LED6_OFF_H[4] R/W
1*
LED6 full OFF
3:0 LED6_OFF_H[3:0] R/W
0000*
LEDn_OFF count for LED6, 4 MSBs
22h LED7_ON_L 7:0 LED7_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED7, 8 LSBs
23h LED7_ON_H 7:5 reserved R
000*
non-writable
4 LED7_ON_H[4] R/W
0*
LED7 full ON
3:0 LED7_ON_H[3:0] R/W
0000*
LEDn_ON count for LED7, 4 MSBs
24h LED7_OFF_L 7:0 LED7_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED7, 8 LSBs
25h LED7_OFF_H 7:5 reserved R
000*
non-writable
4 LED7_OFF_H[4] R/W
1*
LED7 full OFF
3:0 LED7_OFF_H[3:0] R/W
0000*
LEDn_OFF count for LED7, 4 MSBs
26h LED8_ON_L 7:0 LED8_ON_L[7:0] R/W
0000 0000*
LEDn_ON count for LED8, 8 LSBs
27h LED8_ON_H 7:5 reserved R
000*
non-writable
4 LED8_ON_H[4] R/W
0*
LED8 full ON
3:0 LED8_ON_H[3:0] R/W
0000*
LEDn_ON count for LED8, 4 MSBs
28h LED8_OFF_L 7:0 LED8_OFF_L[7:0] R/W
0000 0000*
LEDn_OFF count for LED8, 8 LSBs
29h LED8_OFF_H 7:5 reserved R
000*
non-writable
4 LED8_OFF_H[4] R/W
1*
LED8 full OFF
3:0 LED8_OFF_H[3:0] R/W
0000*
LEDn_OFF count for LED8, 4 MSBs
Table 6. LED_ON, LED_OFF control registers (address 06h to 45h) bit description …continued
Legend: * default value.
Address Register Bit Symbol Access Value Description