CAP1128 Datasheet, PDF (35/75 Pages) Microchip Technology – 8 Channel Capacitive Touch Sensor with 2 LED Drivers

CAP1128
TABLE 6-8: DELTA_SENSE BIT DECODE
DELTA_SENSE[2:0]
2
1
0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Sensitivity Multiplier
128x (most sensitive)
64x
32x (default)
16x
8x
4x
2x
1x - (least sensitive)
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 6-9:
3
0
0
0
0
0
0
0
0
1
BASE_SHIFT BIT DECODE
BASE_SHIFT[3:0]
2
1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
0
0
All others
Data Scaling Factor
0
0
1x
1
2x
0
4x
1
8x
0
16x
1
32x
0
64x
1
128x
0
256x
256x
(default = 1111b)
 2015 Microchip Technology Inc.
DS00001622B-page 35