8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
5.18 Standby Channel Register
Table 5.29 Standby Channel Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
Standby
Channel
CS8_
STBY
CS7_
STBY
CS6_
STBY
CS5_
STBY
CS4_
STBY
CS3_
STBY
CS2_
STBY
CS1_
STBY
40h
R/W
00h
The Standby Channel register controls which (if any) Capacitive Touch Sensors are active during
Standby.
Bit 7 - CS8_STBY - Controls whether the CS8 channel is active in Standby.
‘0’ (default) - The CS8 channel not be sampled during Standby.
‘1’ - The CS8 channel will be sampled during Standby. It will use the Standby threshold setting, and
the standby averaging and sensitivity settings.
Bit 6 - CS7_STBY - Controls whether the CS7 channel is active in Standby.
Bit 5 - CS6_STBY - Controls whether the CS6 channel is active in Standby.
Bit 4 - CS5_STBY - Controls whether the CS5 channel is active in Standby.
Bit 3 - CS4_STBY - Controls whether the CS4 channel is active in Standby.
Bit 2 - CS3_STBY - Controls whether the CS3 channel is active in Standby.
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.
5.19 Standby Configuration Register
Table 5.30 Standby Configuration Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
STBY_
SAMP_
TIME
Standby
Configuration
AVG_
SUM
STBY_CY_TIME
[1:0]
41h
R/W
-
STBY_AVG[2:0]
1Dh
The Standby Configuration register controls averaging and cycle time for those sensors that are active
in Standby.
Bit 7 - AVG_SUM - Determines whether the active sensors will average the programmed number of
samples or whether they will accumulate for the programmed number of samples.
‘0’ - (default) - The active sensor delta count values will be based on the average of the
programmed number of samples when compared against the threshold.
‘1’ - The active sensor delta count values will be based on the summation of the programmed
number of samples when compared against the threshold.
Bits 5 - 3 - STBY_AVG[2:0] - Determines the number of samples that are taken for all active channels
during the sensor cycle as shown in Table 5.31. All samples are taken consecutively on the same
channel before the next channel is sampled and the result is averaged over the number of samples
measured before updating the measured results.
Revision 1.1 (08-05-09)
SMSC CAP1088
DATA5S0HEET
SMSC [ SMSC CORPORATION ]
