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NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I 2 C-bus LED controller
Table 3.
Register summary …continued
Register # Register # D7 D6 D5 D4 D3 D2 D1 D0 Name
(decimal)
(hex)
Type
Function
62
3E
0
0
1
1
1
1
1
0
LED14_ON_L
read/write
LED14 output and
brightness control byte 0
63
3F
0
0
1
1
1
1
1
1
LED14_ON_H
read/write
LED14 output and
brightness control byte 1
64
40
0
1
0
0
0
0
0
0
LED14_OFF_L
read/write
LED14 output and
brightness control byte 2
65
41
0
1
0
0
0
0
0
1
LED14_OFF_H
read/write
LED14 output and
brightness control byte 3
66
42
0
1
0
0
0
0
1
0
LED15_ON_L
read/write
LED15 output and
brightness control byte 0
67
43
0
1
0
0
0
0
1
1
LED15_ON_H
read/write
LED15 output and
brightness control byte 1
68
44
0
1
0
0
0
1
0
0
LED15_OFF_L
read/write
LED15 output and
brightness control byte 2
69
45
0
1
0
0
0
1
0
1
LED15_OFF_H
read/write
LED15 output and
brightness control byte 3
...
reserved for future use
250
FA
1
1
1
1
1
0
1
0
ALL_LED_ON_L
write/read
load all the LEDn_ON
zero
registers, byte 0
251
FB
1
1
1
1
1
0
1
1
ALL_LED_ON_H
write/read
load all the LEDn_ON
zero
registers, byte 1
252
FC
1
1
1
1
1
1
0
0
ALL_LED_OFF_L
write/read
load all the LEDn_OFF
zero
registers, byte 0
253
FD
1
1
1
1
1
1
0
1
ALL_LED_OFF_H
write/read
load all the LEDn_OFF
zero
registers, byte 1
254
FE
1
1
1
1
1
1
1
0
PRE_SCALE [1]
read/write
prescaler for output
frequency
255
FF
1
1
1
1
1
1
1
1
TestMode [2]
read/write
defines the test mode to
be entered
...
[1]
[2]
All further addresses are reserved for future use; reserved addresses will not be acknowledged.
Writes to PRE_SCALE register are blocked when SLEEP bit is logic 0 (MODE 1).
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.
PCA9685
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 2 September 2010
? NXP B.V. 2010. All rights reserved.
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