pca9626 NXP Semiconductors, pca9626 Datasheet - Page 28

• Manufacturer Part Number: pca9626
• Description: 24-bit Fm+ I2c-bus 100 Ma 40 V Led Driver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA9626_1
Product data sheet
Fig 15. Read all registers using the Auto-Increment feature
Fig 16. LED All Call I
(cont.)
(cont.)
S A6
START condition
(1) In this example, several PCA9626s are used and the same sequence (A) (above) is sent to each of them.
(2) ALLCALL bit in MODE1 register is previously set to 1 for this example.
(3) OCH bit in MODE2 register is previously set to 1 for this example.
data from MODE2 register
data from last read byte
A5 A4 A3 A2 A1 A0 0
sequence (A)
sequence (B)
This example assumes that the MODE1[5] = 0 and MODE1[6] = 0.
slave address
not acknowledge
acknowledge
from master
from master
S A6
START condition
S
START condition
acknowledge
2
1
C-bus address programming and LED All Call sequence example
from slave
LED All Call I
A5 A4 A3 A2 A1 A0 0
R/W
0
A
A
slave address
1
P
A
STOP
condition
data from PWM0
0
1
Auto-Increment on
2
C address
1
X
(1)
control register
0
acknowledge
acknowledge
acknowledge
0
from master
from slave
register selection
1
4 devices
0
from the
R/W
R/W
MODE1
0
0
A
A
A
Rev. 01 — 2 June 2009
0
X
1
Auto-Increment on
0
X
X
ALLCALLADR register
0
control register
control register
1
X
ReSTART
A
acknowledge
from slave
condition
register selection
data from
ALLCALLADR
Sr
0
0
register selection
A6
0
1
acknowledge
LEDOUT
from master
A5 A4 A3 A2 A1 A0 1
1
0
slave address
24-bit Fm+ I
1
0
A
0
0
the 16 LEDs are on at the acknowledge
A
A
acknowledge
from slave
acknowledge
from the
4 devices
MODE1 register
LEDOUT register (LED fully ON)
new LED All Call I
1
0
acknowledge
data from
from slave
0
1
2
C-bus 100 mA 40 V LED driver
R/W
acknowledge
1
0
from master
A
0
1
data from MODE1 register
1
0
2
C address
A
0
1
acknowledge
acknowledge
(cont.)
from slave
1
0
PCA9626
4 devices
from the
© NXP B.V. 2009. All rights reserved.
acknowledge
(2)
X
1
from master
condition
condition
002aad616
STOP
STOP
A
A
(3)
P
P
002aad615
A
(cont.)
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