IS31SE5117 EVB User Manual
Lumissil Microsystems – www.lumissil.com
17
Rev. B, 10/25/2020
gray.
NOISE_TH_SET bit is noise threshold set from 0~127. Input data in the corresponding box and press Enter or
Tab key, or move the cursor to another location will set up the threshold.
When the VALUE of the sample changes more than NOISE_TH_SET, but not exceeds the key threshold setting,
the touch key will be considered to be an ambient noise disturbance. And corresponding noise display will turn
red.
5.8
KEY Value Display
The key value will be shown in the red block as Figure 22.
Figure 22: The value of the KEY
As shown in the blue box above, black line is key threshold value, gray line is key value and red line is negative
threshold value.
Key value will update the current capacitance of key. The value of KEY2 is 127 and threshold is 30. The value is
over threshold, so KEY4 value display red meaning pressed.
