pca9685 NXP Semiconductors, pca9685 Datasheet - Page 12

• Manufacturer Part Number: pca9685
• Description: 16-channel, 12-bit Pwm Fm+ I 2c-bus Led Controller
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 3.
[1]
[2]
PCA9685_1
Product data sheet
Register
#
(decimal)
62
63
64
65
66
67
68
69
...
250
251
252
253
254
255
...
Writes to PRE_SCALE register are blocked when SLEEP bit is logic 0 (MODE 1).
Reserved. Writes to this register may cause unpredictable results.
Register summary
Register
# (hex)
3E
3F
40
41
42
43
44
45
reserved for future use
FA
FB
FC
FD
FE
FF
All further addresses are reserved for future use; reserved addresses will not be acknowledged.
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.
D7 D6 D5 D4 D3 D2 D1 D0 Name
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
1
1
1
1
1
1
1
1
1
1
1
1
…continued
1
1
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
0
0
1
1
1
1
Rev. 01 — 24 July 2008
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
16-channel, 12-bit PWM Fm+ I
LED14_ON_L
LED14_ON_H
LED14_OFF_L
LED14_OFF_H
LED15_ON_L
LED15_ON_H
LED15_OFF_L
LED15_OFF_H
ALL_LED_ON_L
ALL_LED_ON_H
ALL_LED_OFF_L
ALL_LED_OFF_H
PRE_SCALE
TestMode
[2]
[1]
Type
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
write/read
zero
write/read
zero
write/read
zero
write/read
zero
read/write
read/write
Function
LED14 output and
brightness control byte 0
LED14 output and
brightness control byte 1
LED14 output and
brightness control byte 2
LED14 output and
brightness control byte 3
LED15 output and
brightness control byte 0
LED15 output and
brightness control byte 1
LED15 output and
brightness control byte 2
LED15 output and
brightness control byte 3
load all the LEDn_ON
registers, byte 0
load all the LEDn_ON
registers, byte 1
load all the LEDn_OFF
registers, byte 0
load all the LEDn_OFF
registers, byte 1
prescaler for output
frequency
defines the test mode to
be entered
2
C-bus LED controller
PCA9685
© NXP B.V. 2008. All rights reserved.
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