Datasheet

CY8C20xx6A/H CapSense Design Guide Doc. No. 001-65973 Rev. *A 21
3.5 CSD User Module Low-Level Parameters
The CSD User Module has several low-level parameters in addition to the high-level parameters. These parameters
are specific to the CSD sensing method and determine how raw count data is acquired from the sensor.
Figure 3-7. PSoC Designer - CSD Parameters WIndow
3.5.1 iDAC Value
The iDAC parameter sets the capacitance measurement range. A higher value corresponds to a wider range. Adjust
the iDAC value such that raw counts are at about 50 to 70 percent of full range. This parameter can be changed in
run time using the corresponding API function.
Possible values are 1 to 255.
3.5.2 Resolution
This parameter determines the scanning resolution in bits. The maximum raw count for scanning resolution of N bits
is 2
N–1
Possible values are 9 to 16 bits.
. Increasing the resolution improves sensitivity, but reduces scan time.