pca9633 NXP Semiconductors, pca9633 Datasheet - Page 25

• Manufacturer Part Number: pca9633
• Description: Pca9633 4-bit Fm+ I2c-bus Led Driver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA9633_3
Product data sheet
Fig 20. LED All Call I
Fig 21. Software Reset (SWRST) Call sequence
(1) 10-pin version is used for this figure. Four PCA9633DP2 are used and the same sequence (A) (above) is sent to each of
(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.
them. A[1:0] = 00 to 11.
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
slave address
0
2
0
1
C address
0
0
0
1
2
acknowledge
from slave(s)
C address
0 A1 A0 0
1
1
(1)
R/W
0
acknowledge
acknowledge
0
from slave
1
4 devices
A
from the
R/W
R/W
0
Rev. 03 — 20 December 2006
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
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
PCA9633 is(are) reset.
4-bit Fm+ I
1
0
1
0
acknowledge
from slave(s)
1
0
2
1
C address
0
1
acknowledge
acknowledge
0
002aab425
from slave
1
0
PCA9633
4 devices
2
A
from the
© NXP B.V. 2006. All rights reserved.
C-bus LED driver
(2)
X
1
condition
condition
002aab424
P
STOP
STOP
A
A
(3)
P
P
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