pca9632 NXP Semiconductors, pca9632 Datasheet - Page 20

• Manufacturer Part Number: pca9632
• Description: Pca9632 4-bit Fm I?c-bus Low Power Led Driver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA9632_1
Objective data sheet
Fig 17. LED All Call I
Fig 18. Software Reset (SWRST) Call sequence
(1) ALLCALL bit in MODE1 register is equal to 1 for this example.
(2) OCH bit in MODE2 register is equal to 1 for this example.
sequence (A)
sequence (B)
S
START condition
0
SWRST Call I
S
START condition
S
START condition
0
2
C-bus address programming and LED All Call sequence example
1
1
LED All Call I
0
1
0
0
slave address
2
0
1
C address
0
0
0
1
2
acknowledge
from slave(s)
C address
0
1
1
R/W
1
0
acknowledge
acknowledge
0
from slave
0
1
4 devices
A
from the
R/W
R/W
0
0
Rev. 01 — 28 September 2007
1
A
A
0
X
X
Auto-Increment on
Byte 1 = 0xA5
1
SWRST data
X
X
0
control register
control register
X
X
0
0
0
1
register selection
register selection
ALLCALLADR
1
1
0
LEDOUT
1
0
1
Registers are set to default power-up values.
0
0
A
acknowledge
from slave(s)
0
0
4-bit Fm+ I
0
the 16 LEDs are on at the acknowledge
A
A
acknowledge
from slave
acknowledge
from the
4 devices
1
LEDOUT register (LED fully ON)
new LED All Call I
1
0
Byte 2 = 0x5A
0
SWRST data
0
1
1
1
0
PCA9632 is(are) reset.
2
1
C-bus low power LED driver
0
1
0
acknowledge
from slave(s)
1
0
2
1
C address
0
1
acknowledge
acknowledge
0
002aad048
from slave
1
0
PCA9632
4 devices
A
from the
© NXP B.V. 2007. All rights reserved.
(1)
X
1
condition
condition
002aad047
P
STOP
STOP
A
A
(2)
P
P
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