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NXP Semiconductors
PCA9633
4-bit Fm+ I 2 C-bus LED driver
slave address (1)
control register
PWM0 register
PWM1 register
S A6 A5 A4 A3 A2 A1 A0 0
A
1
0
1
0
0
0
1
0
A
A
A
(cont.)
START condition
R/W
acknowledge
from slave
increment
on Individual
brightness
registers only
PWM0
register
selection
acknowledge
from slave
acknowledge
from slave
acknowledge
from slave
Auto-Increment on
PWM2 register
PWM3 register
PWM0 register
PWMx register
(cont.)
A
acknowledge
from slave
A
acknowledge
from slave
A
acknowledge
from slave
A
acknowledge
from slave
P
STOP
condition
002aab420
(1) 16-pin version only.
Fig 18. Multiple writes to Individual Brightness registers only using the Auto-Increment feature
ReSTART
slave address (1)
control register
condition
slave address (1)
data from MODE1 register
S A6 A5 A4 A3 A2 A1 A0 0
A
1
0
0
0
0
0
0
0
A Sr A6 A5 A4 A3 A2 A1 A0 1
A
A (cont.)
START condition
R/W
acknowledge
Auto-Increment
on all registers
MODE1
register
selection
acknowledge
from slave
R/W
acknowledge
acknowledge
from master
from slave
Auto-Increment on
data from
from slave
data from
data from MODE2 register
data from PWM0
ALLCALLADR register
MODE1 register
(cont.)
A
acknowledge
from master
A
acknowledge
from master
A
acknowledge
from master
A (cont.)
acknowledge
from master
data from last read byte
(cont.)
A
not acknowledge
from master
P
STOP
condition
002aab423
(1) 16-pin version only.
Fig 19. Read all registers using the Auto-Increment feature
PCA9633_5
? NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 25 July 2008
24 of 43
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