CAP1298 Datasheet, PDF (49/68 Pages) Microchip Technology – 8-Channel Capacitive Touch Sensor Controller with Proximity Detection & Signal Guard

CAP1298
TABLE 5-10: STBY_SENSE BIT DECODE (CONTINUED)
STBY_SENSE[2:0]
2
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
5.24 Standby Threshold Register
Sensitivity Multiplier
16x
8x
4x
2x
1x - (least sensitive)
TABLE 5-11: STANDBY THRESHOLD REGISTER
Addr
R/W
43h
R/W
Register
Standby
Threshold
B7
B6
B5
B4
B3
B2
B1
B0
Default
-
64
32
16
8
4
2
1
40h
The Standby Threshold register stores the delta threshold that is used to determine if a touch has been detected. When
a touch occurs, the input signal of the corresponding sensor pad changes due to the capacitance associated with a
touch. If the sensor input change exceeds the threshold settings, a touch is detected.
5.25 Sensor Input Base Count Registers
TABLE 5-12: SENSOR INPUT BASE COUNT REGISTERS
Addr
R/W
Register
B7
B6
50h
R
Sensor Input 1
Base Count
128
64
51h
R
Sensor Input 2
Base Count
128
64
52h
R
Sensor Input 3
Base Count
128
64
53h
R
Sensor Input 4
Base Count
128
64
54h
R
Sensor Input 5
Base Count
128
64
55h
R
Sensor Input 6
Base Count
128
64
56h
R
Sensor Input 7
Base Count
128
64
57h
R
Sensor Input 8
Base Count
128
64
B5
B4
B3
B2
B1
B0
Default
32
16
8
4
2
1
C8h
32
16
8
4
2
1
C8h
32
16
8
4
2
1
C8h
32
16
8
4
2
1
C8h
32
16
8
4
2
1
C8h
32
16
8
4
2
1
C8h
32
16
8
4
2
1
C8h
32
16
8
4
2
1
C8h
 2013-2015 Microchip Technology Inc.
DS00001571B-page 49