Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
Table 3.5 Block Read Protocol
START
CLIENT
ADDRESS
WR
ACK
REGISTER
ADDRESS
ACK
START
CLIENT
ADDRESS
RD
ACK
REGISTER
DATA
1->0
0101_000
0
0
XXh
0
1 ->0
0101_000
1
0
XXh
ACK
REGISTER
DATA
ACK
REGISTER
DATA
ACK
REGISTER
DATA
ACK
. . .
REGISTER
DATA
NACK
STOP
0
XXh
0
XXh
0
XXh
0
. . .
XXh
1
0 -> 1
3.2.5
SMBus Send Byte
The Send Byte protocol is used to set the internal address register pointer to the correct address
location. No data is transferred during the Send Byte protocol as shown in Table 3.6.
Table 3.6 Send Byte Protocol
CLIENT
ADDRESS
REGISTER
ADDRESS
START
1 -> 0
WR
ACK
ACK
STOP
0101_000
0
0
XXh
0
0 -> 1
3.2.6
SMBus Receive Byte
The Receive Byte protocol is used to read data from a register when the internal register address
pointer is known to be at the right location (e.g. set via Send Byte). This is used for consecutive reads
of the same register as shown in Table 3.7.
Table 3.7 Receive Byte Protocol
CLIENT
START
ADDRESS
RD
ACK
REGISTER DATA
NACK
STOP
1 -> 0
0101_000
1
0
XXh
1
0 -> 1
Revision 1.65 (08-11-09)
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