pca9635 NXP Semiconductors, pca9635 Datasheet - Page 22

• Manufacturer Part Number: pca9635
• Description: Pca9635 16-bit Fm I2c-bus Led Driver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA9635_5
Product data sheet
Fig 14. Read all registers using the Auto-Increment feature
Fig 15. LED All Call I
(cont.)
(cont.)
S A6
START condition
(1) In this example, several PCA9635s are used and the same sequence (A) (above) is sent to each of them.
(2) ALLCALL bit in MODE1 register is equal to 1 for this example.
(3) OCH bit in MODE2 register is equal to 1 for this example.
data from MODE2 register
A5 A4 A3 A2 A1 A0 0
data from last read byte
sequence (A)
sequence (B)
slave address
not acknowledge
acknowledge
from master
from master
S A6
START condition
S
START condition
acknowledge
2
C-bus address programming and LED All Call sequence example
from slave
1
LED All Call I
R/W
A5 A4 A3 A2 A1 A0 0
0
slave address
A
A
A
1
P
STOP
condition
1
Auto-Increment on
data from PWM0
0
Auto-Increment
on all registers
2
C address
0
1
(1)
control register
0
0
acknowledge
acknowledge
acknowledge
from slave
0
from master
1
4 devices
from the
R/W
R/W
0
0
MODE1
register
selection
Rev. 05 — 22 March 2007
0
A
A
A
0
X
X
Auto-Increment on
0
X
X
ReSTART
ALLCALLADR register
A
control register
control register
acknowledge
from slave
condition
X
X
Sr
register selection
1
0
ALLCALLADR
data from
register selection
A6
1
1
LEDOUT
A5 A4 A3 A2 A1 A0 1
0
0
acknowledge
slave address
from master
1
0
1
0
the 16 LEDs are on at the acknowledge
A
A
A
acknowledge
from slave
acknowledge
from the
4 devices
LEDOUT register (LED fully ON)
new LED All Call I
acknowledge
1
0
from slave
MODE1 register
0
1
R/W
data from
16-bit Fm+ I
1
0
A
0
1
data from MODE1 register
acknowledge
from master
1
0
2
C address
0
1
acknowledge
acknowledge
from slave
1
0
PCA9635
A
4 devices
2
from the
© NXP B.V. 2007. All rights reserved.
C-bus LED driver
(cont.)
acknowledge
(2)
X
1
condition
condition
from master
002aac152
STOP
STOP
A
A
(3)
P
P
002aac151
A
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(cont.)