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STCF05 Datasheet(PDF) 18 Page - STMicroelectronics

Part # STCF05
Description  High power white LED driver with I²C interface
PDF  33 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STCF05 Datasheet(HTML) 18 Page - STMicroelectronics

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I²C bus interface
STCF05
18/33
Doc ID 15257 Rev 4
8.7
Writing to multiple registers with incremental addressing
It would be unpractical to send several times the device address and the address of the
register when writing to multiple registers. STCF05 supports writing to multiple registers with
incremental addressing. When data is written to a register, the address register is
automatically incremented, so the next data can be sent without sending the device address
and the register address again. See Figure 9 below.
8.8
Reading from a single register
The reading operation starts with a START bit followed by the 7 bit device address of
STCF05. The 8th bit is the R/W bit, which is 0 in this case. STCF05 confirms the receiving of
the address + R/W bit by an acknowledge pulse. The address of the register which should
be read is sent afterwards and confirmed again by an acknowledge pulse of STCF05 again.
Then the master generates a START bit again and sends the device address followed by the
R/W bit, which is 1 now. STCF05 confirms the receiving of the address + R/W bit by an
Figure 8.
Writing to a single register
S
T
A
R
T
DEVICE
ADDRESS
7 bits
A
C
K
W
R
I
T
E
M
S
B
L
S
B
R
/
W
A
C
K
ADDRESS OF
REGISTER
DATA
A
C
K
A
C
K
S
T
O
P
M
S
B
M
S
B
L
S
B
L
S
B
SDA LINE
S
T
A
R
T
DEVICE
ADDRESS
7 bits
A
C
K
W
R
I
T
E
M
S
B
L
S
B
R
/
W
A
C
K
ADDRESS OF
REGISTER
DATA
A
C
K
A
C
K
S
T
O
P
M
S
B
M
S
B
L
S
B
L
S
B
S
T
A
R
T
DEVICE
ADDRESS
7 bits
A
C
K
W
R
I
T
E
M
S
B
L
S
B
R
/
W
A
C
K
ADDRESS OF
REGISTER
DATA
A
C
K
A
C
K
S
T
O
P
M
S
B
M
S
B
L
S
B
L
S
B
SDA LINE
Figure 9.
Writing to multiple register with incremental addressing
S
T
A
R
T
DEVICE
ADDRESS
7 bits
A
C
K
W
R
I
T
E
M
S
B
L
S
B
R
/
W
A
C
K
ADDRESS OF
REGISTER i
DATA i
A
C
K
A
C
K
S
T
O
P
M
S
B
M
S
B
L
S
B
L
S
B
DATA i+1
A
C
K
L
S
B
DATA i+2
A
C
K
L
S
B
DATA i+2
L
S
B
DATA i+n
A
C
K
M
S
B
M
S
B
M
S
B
M
S
B
M
S
B
A
C
K
L
S
B
SDA LINE
S
T
A
R
T
DEVICE
ADDRESS
7 bits
A
C
K
W
R
I
T
E
M
S
B
L
S
B
R
/
W
A
C
K
ADDRESS OF
REGISTER i
DATA i
A
C
K
A
C
K
S
T
O
P
M
S
B
M
S
B
L
S
B
L
S
B
DATA i+1
A
C
K
L
S
B
DATA i+2
A
C
K
L
S
B
DATA i+2
L
S
B
DATA i+n
A
C
K
M
S
B
M
S
B
M
S
B
M
S
B
M
S
B
A
C
K
L
S
B
S
T
A
R
T
DEVICE
ADDRESS
7 bits
A
C
K
W
R
I
T
E
M
S
B
L
S
B
R
/
W
A
C
K
ADDRESS OF
REGISTER i
DATA i
A
C
K
A
C
K
S
T
O
P
M
S
B
M
S
B
L
S
B
L
S
B
DATA i+1
A
C
K
L
S
B
DATA i+2
A
C
K
L
S
B
DATA i+2
L
S
B
DATA i+n
A
C
K
M
S
B
M
S
B
M
S
B
M
S
B
M
S
B
A
C
K
L
S
B
SDA LINE



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