Datasheet

8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
Revision 1.32 (01-05-12) 28 SMSC CAP1188
DATASHEET
3.7.3 Write Data
Writes data value to the register address stored in the address pointer. Performs auto increment of
address pointer after the data is loaded into the register.
3.7.4 Read Data
Reads data referenced by the address pointer. Performs auto increment of address pointer after the
data is transferred to the Master.
Figure 3.10 SPI Set Address Pointer Command - Bi-directional Mode
Figure 3.11 SPI Write Data Command - Bi-directional Mode
Figure 3.12 SPI Read Data Command - Bi-directional Mode
Master SPDOUT
SPI_MSIO
Register Address
SPI_CS#
SPI_CLK
Set Address Pointer – 7Dh
‘0’ ‘1’ ‘0’‘1’ ‘1’ ‘1’ ‘1’ ‘1’
Master SPDOUT
SPI_MSIO
Register Write Data
SPI_CS#
SPI_CLK
Write Command – 7Eh
‘1’ ‘1’ ‘1’ ‘1’ ‘1’ ‘1’ ‘0’‘0’
Master SPDOUT
SPI_MSIO
Master Drives
Slave Drives Indeterminate
Register Read Data
SPI_CLK
Read Command – 7Fh
SPI_CS#
‘0’ ‘1’ ‘1’
‘1’
‘1’
‘1’
‘1’
‘1’