CAP1206 Datasheet, PDF (39/63 Pages) Microchip Technology – 6-Channel Capacitive Touch Sensor

CAP1206
5.17 Recalibration Configuration Register
TABLE 5-29: RECALIBRATION CONFIGURATION REGISTERS
Addr
2Fh
R/W
R/W
Register
Recalibration
Configuration
B7
B6
B5
BUT_ NO_CLR NO_CLR
LD_TH _INTD
_NEG
B4
B3
NEG_DELTA_
CNT[1:0]
B2 B1 B0
CAL_CFG[2:0]
Default
8Ah
The Recalibration Configuration register controls some recalibration routine settings (see Section 4.4, "Sensor Input
Calibration") as well as advanced controls to program the Sensor Input Threshold register settings.
Bit 7 - BUT_LD_TH - Enables setting all Sensor Input Threshold registers by writing to the Sensor Input 1 Threshold
register.
• ‘0’ - Each Sensor Input X Threshold register is updated individually.
• ‘1’ (default) - Writing the Sensor Input 1 Threshold register will automatically overwrite the Sensor Input Threshold
registers for all sensor inputs (Sensor Input Threshold 1 through Sensor Input Threshold 6). The individual Sensor
Input X Threshold registers (Sensor Input 2 Threshold through Sensor Input 6 Threshold) can be individually
updated at any time.
Bit 6 - NO_CLR_INTD - Controls whether the accumulation of intermediate data is cleared if the noise status bit is set.
• ‘0’ (default) - The accumulation of intermediate data is cleared if the noise status bit is set.
• ‘1’ - The accumulation of intermediate data is not cleared if the noise status bit is set.
APPLICATION NOTE: Bits 5 and 6 should both be set to the same value. Either both should be set to ‘0’ or both
should be set to ‘1’.
Bit 5 - NO_CLR_NEG - Controls whether the consecutive negative delta counts counter is cleared if the noise status bit
is set.
‘0’ (default) - The consecutive negative delta counts counter is cleared if the noise status bit is set.
‘1’ - The consecutive negative delta counts counter is not cleared if the noise status bit is set.
Bits 4 - 3 - NEG_DELTA_CNT[1:0] - Determines the number of negative delta counts necessary to trigger a digital reca-
libration (see Section 4.4.2, "Negative Delta Count Recalibration"), as shown in Table 5-30.
TABLE 5-30: NEG_DELTA_CNT BIT DECODE
NEG_DELTA_CNT[1:0]
1
0
0
0
0
1
1
0
1
1
Number of Consecutive Negative Delta Count Values
8
16 (default)
32
None (disabled)
Bits 2 - 0 - CAL_CFG[2:0] - Determines the update time and number of samples of the automatic recalibration routine
(see Section 4.4.1, "Automatic Recalibration"). The settings apply to all sensor inputs universally (though individual sen-
sor inputs can be configured to support recalibration - see Section 5.10.1).
 2013-2015 Microchip Technology Inc.
DS00001567B-page 39