8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
Bit 3 - LED4_DN - Indicates that LED4 has finished its ramping behavior as determined by the
LED4_CTL bits.
Bit 2 - LED3_DN - Indicates that LED3 has finished its ramping behavior as determined by the
LED3_CTL bits.
Bit 1 - LED2_DN - Indicates that LED2 has finished its ramping behavior as determined by the
LED2_CTL bits.
Bit 0 - LED1_DN - Indicates that LED1 has finished its ramping behavior as determined by the
LED1_CTL bits.
5.3
Noise Flag Status Registers
Table 5.4 Noise Flag Status Registers
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
CS8_
NOISE
CS7_
NOISE
CS6_
NOISE
CS5_
NOISE
CS4_
NOISE
CS3_
NOISE
CS2_
NOISE
CS1_
NOISE
0Ah
R
Noise Flag Status
00h
The Noise Flag Status registers store status bits that are generated from the analog block if the
detected noise is above the operating region of the analog detector. These bits indicate that the most
recently received data from the sensor is invalid and should not be used for touch detection.
Furthermore, so long as the bit is set for a particular channel, no decisions are made with the data. A
touch is not detected, and a release is not detected.
These bits are not sticky and will be cleared automatically if the analog block does not report a noise
error.
5.4
Sensor Delta Count Registers
Table 5.5 Sensor Delta Count Registers
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
Sensor 1 Delta
Count
10h
11h
12h
13h
14h
15h
16h
17h
R
Sign
64
32
16
8
4
2
1
00h
Sensor 2 Delta
Count
R
R
R
R
R
R
R
Sign
Sign
Sign
Sign
Sign
Sign
Sign
64
64
64
64
64
64
64
32
32
32
32
32
32
32
16
16
16
16
16
16
16
8
8
8
8
8
8
8
4
4
4
4
4
4
4
2
2
2
2
2
2
2
1
1
1
1
1
1
1
00h
00h
00h
00h
00h
00h
00h
Sensor 3 Delta
Count
Sensor 4 Delta
Count
Sensor 5 Delta
Count
Sensor 6 Delta
Count
Sensor 7 Delta
Count
Sensor 8 Delta
Count
SMSC CAP1088
Revision 1.1 (08-05-09)
DATA3S7HEET
SMSC [ SMSC CORPORATION ]
