CAP1298 datasheet(44/68 Pages) MICROCHIP

44 / 68 page

CAP1298

DS00001571B-page 44

 2013-2015 Microchip Technology Inc.

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 5-33.

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).

Note 5-1

Recalibration Samples refers to the number of samples that are measured and averaged before the

Base Count is updated however does not control the base count update period.

TABLE 5-33:

NEG_DELTA_CNT BIT DECODE

NEG_DELTA_CNT[1:0]

Number of Consecutive Negative Delta Count Values

16 (default)

None (disabled)

TABLE 5-34:

CAL_CFG BIT DECODE

CAL_CFG[2:0]

Recalibration Samples

(see Note 5-1)

Update Time (see

Note 5-2)

64 (default)

128

256

1024

256

2048

256

4096

CAP1298 Datasheet(PDF) 44 Page - Microchip Technology