PCA9685_2
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 16 July 2009
21 of 50
NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I2C-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