CAP1106 Datasheet, PDF (25/48 Pages) Microchip Technology – 6 Channel Capacitive Touch Sensor

CAP1106
noise will still be detected and touches will be blocked normally; however, the status bits will not be updated.
Bit 2 - DIS_RF_NOISE - Determines whether the RF noise filter is enabled. Setting this bit disables the feature.
• ‘0’ (default) - If RF noise is detected by the analog block, the delta count on the corresponding channel is set to 0.
Note that this does not require that Noise Status bits be set.
• ‘1’ - A touch is not blocked even if RF noise is detected.
Bit 0 - INT_REL_n - Controls the interrupt behavior when a release is detected on a button.
• ‘0’ (default) - An interrupt is generated when a press is detected and again when a release is detected and at the
repeat rate (if enabled - see Section 6.13).
• ‘1’ - An interrupt is generated when a press is detected and at the repeat rate but not when a release is detected.
6.7 Sensor Input Enable Registers
TABLE 6-11: SENSOR INPUT ENABLE REGISTERS
ADDR R/W
Register
B7
B6
B5
B4
B3
B2
B1
B0
21h
R/W
Sensor Input
Enable
-
-
CS6_EN CS5_EN CS4_EN CS3_EN CS2_EN CS1_EN
Default
3Fh
The Sensor Input Enable registers determine whether a capacitive touch sensor input is included in the sampling cycle.
The length of the sampling cycle is not affected by the number of sensor inputs measured.
Bit 5 - CS6_EN - Enables the CS6 input to be included during the sampling cycle.
• ‘0’ - The CS6 input is not included in the sampling cycle.
• ‘1’ (default) - The CS6 input is included in the sampling cycle.
Bit 4 - CS5_EN - Enables the CS5 input to be included during the sampling cycle.
Bit 3 - CS4_EN - Enables the CS4 input to be included during the sampling cycle.
Bit 2 - CS3_EN - Enables the CS3 input to be included during the sampling cycle.
Bit 1 - CS2_EN - Enables the CS2 input to be included during the sampling cycle.
Bit 0 - CS1_EN - Enables the CS1 input to be included during the sampling cycle.
6.8 Sensor Input Configuration Register
TABLE 6-12: SENSOR INPUT CONFIGURATION REGISTER
ADDR R/W
Register
B7
B6
B5
B4
22h
R/W
Sensor Input
Configuration
MAX_DUR[3:0]
B3
B2
B1
B0
RPT_RATE[3:0]
Default
A4h
The Sensor Input Configuration Register controls timings associated with the Capacitive sensor inputs 1 - 6.
Bits 7 - 4 - MAX_DUR[3:0] - (default 1010b) - Determines the maximum time that a sensor pad is allowed to be touched
until the capacitive touch sensor input is recalibrated, as shown in Table 6-13.
TABLE 6-13: MAX_DUR BIT DECODE
MAX_DUR[3:0]
3
2
1
0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
Time Before Recalibration
560ms
840ms
1120ms
1400ms
1680ms
2240ms
2800ms
 2015 Microchip Technology Inc.
DS00001624B-page 25