CAP1133 datasheet(33/63 Pages) MICROCHIP

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DS00001625B-page 33

CAP1133

Bit 1 - CS2_PTRN - Determines whether CS2 is considered as part of the Multiple Touch Pattern.

Bit 0 - CS1_PTRN - Determines whether CS1 is considered as part of the Multiple Touch Pattern.

6.17

Recalibration Configuration Register

The Recalibration Configuration register controls the automatic re-calibration routine settings as well as advanced con-

trols 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

• ‘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 3). The individual Sensor

Input X Threshold registers (Sensor Input 2 Threshold and Sensor Input 3 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 re-

calibration as shown in Table 6-30.

Bits 2 - 0 - CAL_CFG[2:0] - Determines the update time and number of samples of the automatic re-calibration routine.

The settings apply to all sensor inputs universally (though individual sensor inputs can be configured to support re-cal-

ibration - see Section 6.11).

TABLE 6-29:

RECALIBRATION CONFIGURATION REGISTERS

ADDR

R/W

Default

2Fh

R/W

Recalibration

Configuration

BUT_

LD_TH

NO_

CLR_

INTD

NO_

CLR_

NEG

NEG_DELTA_

CNT[1:0]

CAL_CFG[2:0]

8Ah

TABLE 6-30:

NEG_DELTA_CNT BIT DECODE

NEG_DELTA_CNT[1:0]

Number of Consecutive Negative Delta Count Values

16 (default)

None (disabled)

TABLE 6-31:

CAL_CFG BIT DECODE

CAL_CFG[2:0]

Recalibration Samples

(see Note 6-1)

Update Time (see

Note 6-2)

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