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CAP1208 Datasheet(PDF) 46 Page - Microchip Technology

Part # CAP1208
Description  8-Channel Capacitive Touch Sensor
PDF  64 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

CAP1208 Datasheet(HTML) 46 Page - Microchip Technology

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CAP1208
DS00001570C-page 46
 2013-2015 Microchip Technology Inc.
5.23
Standby Threshold Register
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.
5.24
Sensor Input Base Count Registers
0
1
1
16x
100
8x
101
4x
110
2x
1
1
1
1x - (least sensitive)
TABLE 5-42:
STANDBY THRESHOLD REGISTER
Addr
R/W
Register
B7
B6
B5
B4
B3
B2
B1
B0
Default
43h
R/W
Standby
Threshold
-
64
32
16
8421
40h
TABLE 5-43:
SENSOR INPUT BASE COUNT REGISTERS
Addr
R/W
Register
B7
B6
B5
B4
B3
B2
B1
B0
Default
50h
R
Sensor Input 1
Base Count
128
64
32
16
8421
C8h
51h
R
Sensor Input 2
Base Count
128
64
32
16
8421
C8h
52h
R
Sensor Input 3
Base Count
128
64
32
16
8421
C8h
53h
R
Sensor Input 4
Base Count
128
64
32
16
8421
C8h
54h
R
Sensor Input 5
Base Count
128
64
32
16
8421
C8h
55h
R
Sensor Input 6
Base Count
128
64
32
16
8421
C8h
56h
R
Sensor Input 7
Base Count
128
64
32
16
8421
C8h
57h
R
Sensor Input 8
Base Count
128
64
32
16
8421
C8h
TABLE 5-41:
STBY_SENSE BIT DECODE (CONTINUED)
STBY_SENSE[2:0]
Sensitivity Multiplier
210



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