PCA9685_2
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 16 July 2009
12 of 50
NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I2C-bus LED controller
[1]
Writes to PRE_SCALE register are blocked when SLEEP bit is logic 0 (MODE 1).
[2]
Reserved. Writes to this register may cause unpredictable results.
Remark: Auto Increment past register 69 will point to MODE1 register (register 0).
Auto Increment also works from register 250 to register 254, then rolls over to register 0.
62
3E
00111110
LED14_ON_L
read/write
LED14 output and
brightness control byte 0
63
3F
00111111
LED14_ON_H
read/write
LED14 output and
brightness control byte 1
64
40
01000000
LED14_OFF_L
read/write
LED14 output and
brightness control byte 2
65
41
01000001
LED14_OFF_H
read/write
LED14 output and
brightness control byte 3
66
42
01000010
LED15_ON_L
read/write
LED15 output and
brightness control byte 0
67
43
01000011
LED15_ON_H
read/write
LED15 output and
brightness control byte 1
68
44
01000100
LED15_OFF_L
read/write
LED15 output and
brightness control byte 2
69
45
01000101
LED15_OFF_H
read/write
LED15 output and
brightness control byte 3
...
reserved for future use
250
FA
11111010
ALL_LED_ON_L
write/read
zero
load all the LEDn_ON
registers, byte 0
251
FB
11111011
ALL_LED_ON_H
write/read
zero
load all the LEDn_ON
registers, byte 1
252
FC
11111100
ALL_LED_OFF_L
write/read
zero
load all the LEDn_OFF
registers, byte 0
253
FD
11111101
ALL_LED_OFF_H
write/read
zero
load all the LEDn_OFF
registers, byte 1
254
FE
11111110
read/write
prescaler for output
frequency
255
FF
read/write
denes the test mode to
be entered
...
All further addresses are reserved for future use; reserved addresses will not be acknowledged.
Table 3.
Register summary …continued
Register
#
(decimal)
Register
# (hex)
D7 D6 D5 D4 D3 D2 D1 D0 Name
Type
Function