CAP1188 datasheet(36/79 Pages) MICROCHIP

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CAP1188

DS00001620C-page 36

 2015 Microchip Technology Inc.

Bits 3 - 0 - BASE_SHIFT[3:0] - Controls the scaling and data presentation of the Base Count registers. The higher the

value of these bits, the larger the range and the lower the resolution of the data presented. The scale factor represents

the multiplier to the bit-weighting presented in these register descriptions.

APPLICATION NOTE:

The BASE_SHIFT[3:0] bits normally do not need to be updated. These settings will not affect

touch detection or sensitivity. These bits are sometimes helpful in analyzing the Cap Sensing

board performance and stability.

TABLE 6-8:

DELTA_SENSE BIT DECODE

DELTA_SENSE[2:0]

Sensitivity Multiplier

210

128x (most sensitive)

64x

32x (default)

16x

100

101

110

1x - (least sensitive)

TABLE 6-9:

BASE_SHIFT BIT DECODE

BASE_SHIFT[3:0]

Data Scaling Factor

210

000

001

010

011

100

16x

101

32x

110

64x

128x

256x

All others

256x

(default = 1111b)

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