3 Channel Capacitive Touch Sensor with 3 LED Drivers
Datasheet
Table 5.34 CSx_BN_TH Bit Decode
CS_BN_TH[1:0]
1
0
PERCENT THRESHOLD SETTING
0
0
1
1
0
1
0
1
25%
37.5% (default)
50%
62.5%
5.20
Standby Channel Register
Table 5.35 Standby Channel Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
Standby
Channel
CS3_
STBY
CS2_
STBY
CS1_
STBY
40h
R/W
-
-
-
-
-
00h
The Standby Channel register controls which (if any) capacitive touch sensor inputs are active during
Standby.
Bit 2 - CS3_STBY - Controls whether the CS3 channel is active in Standby.
‘0’ (default) - The CS3 channel not be sampled during Standby mode.
‘1’ - The CS3 channel will be sampled during Standby Mode. It will use the Standby threshold
setting, and the standby averaging and sensitivity settings.
Bit 1 - CS2_STBY - Controls whether the CS2 channel is active in Standby.
Bit 0 - CS1_STBY - Controls whether the CS1 channel is active in Standby.
5.21
Standby Configuration Register
Table 5.36 Standby Configuration Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
Standby
Configuration
AVG_
SUM
STBY_SAMP_
TIME[1:0]
STBY_CY_TIME
[1:0]
41h
R/W
STBY_AVG[2:0]
39h
The Standby Configuration register controls averaging and cycle time for those sensor inputs that are
active in Standby. This register is useful for detecting proximity on a small number of sensor inputs as
it allows the user to change averaging and sample times on a limited number of sensor inputs and still
maintain normal functionality in the fully active state.
Bit 7 - AVG_SUM - Determines whether the active sensor inputs will average the programmed number
of samples or whether they will accumulate for the programmed number of samples.
Revision 1.32 (01-05-12)
SMSC CAP1133
DATA4S4HEET
SMSC [ SMSC CORPORATION ]
