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NXP Semiconductors
PCU9955
16-channel UFm I 2 C-bus 57 mA constant current LED driver
Table 4.
Register summary …continued
Register
D6
D5
D4
D3
D2
D1
D0
Name
Type
Function
number
(hexadecimal)
15h
16h
17h
18h
19h
1Ah to 21h
22h
23h
24h
25h
26h
27h
28h
29h
2Ah
2Bh
2Ch
2Dh
2Eh
2Fh
30h
31h
32h to 39h
3Ah
3Bh
3Ch
3Dh
3Eh
3Fh
40h
41h
42h
43h
0
0
0
0
0
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-
0
0
0
0
0
0
-
-
1
1
0
0
0
0
0
-
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
-
1
1
1
1
1
1
-
-
0
0
1
1
1
1
1
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
-
1
1
1
1
1
1
-
-
0
0
0
0
0
1
1
-
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
-
1
1
1
1
1
1
-
-
0
0
1
1
1
0
0
-
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
-
0
0
1
1
1
1
-
-
0
0
0
1
1
0
0
-
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
-
1
1
0
0
1
1
-
-
1
1
1
0
1
0
1
-
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
-
0
1
0
1
0
1
-
-
0
1
PWM11
PWM12
PWM13
PWM14
PWM15
-
IREF0
IREF1
IREF2
IREF3
IREF4
IREF5
IREF6
IREF7
IREF8
IREF9
IREF10
IREF11
IREF12
IREF13
IREF14
IREF15
-
OFFSET
SUBADR1
SUBADR2
SUBADR3
ALLCALLADR
RESERVED1
-
-
PWMALL
IREFALL
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
write only
brightness control LED11
brightness control LED12
brightness control LED13
brightness control LED14
brightness control LED15
not used [1]
output gain control register 0
output gain control register 1
output gain control register 2
output gain control register 3
output gain control register 4
output gain control register 5
output gain control register 6
output gain control register 7
output gain control register 8
output gain control register 9
output gain control register 10
output gain control register 11
output gain control register 12
output gain control register 13
output gain control register 14
output gain control register 15
not used [1]
Offset/delay on LEDn outputs
I 2 C-bus subaddress 1
I 2 C-bus subaddress 2
I 2 C-bus subaddress 3
All Call I 2 C-bus address
reserved [2]
not used [1]
not used [1]
brightness control for all LEDn
output gain control for all registers
IREF0 to IREF15
44h to 7Fh
-
-
-
-
-
-
-
-
write only
not used [1]
[1]
[2]
Remark: Writing to registers marked ‘not used’ will be ignored.
Remark: Writing to registers marked ‘reserved’ will not change any functionality in the chip.
PCU9955
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 2 October 2012
? NXP B.V. 2012. All rights reserved.
10 of 39
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