IS31SE5117 EVB User Manual
Lumissil Microsystems – www.lumissil.com
14
Rev. B, 10/25/2020
5. KEY VARIATION
5.1
Operating Mode Switching
As shown by the red box in Figure 14, IS31SE5117 EVB is in normal mode, and the corresponding indicator light will turn
green. After pressing the "Sleep" button, IS31SE5117 EVB will enter sleep mode, and the corresponding indicator light
will turn red. At this time, IS31SE5117 can only be woken up by the key that has been previously set as a touch key and
the wake-up function is enabled to return to Normal Mode.
Figure 14: Key Variation page of GUI
Note: If the user sets a specific key to GPIO (high) or GPIO (low), when IS31SE5117 EVB enters sleep mode, this
key will continue to maintain its previous state.
5.2
Gain Setting
The button GAIN_SET in the blue box in Figure 14 above is used to set gain for the touch keys. The gain could be
set in 1~16 levels by pulling the scroll bar and the current gain value will be shown in bottom.
Setting gain will affect the sensitivity of all the touch keys. If gain value is set too large, high sensitivity of keys
may cause a false trigger. Therefore, the touch key gain setting should be adjusted according to the actual touch
button size and working environment.
5.3
Threshold of Key
As shown in Figure 15 below,
Figure 15: Threshold setting
THRESHOLD is used to set the threshold of keys (KEY0-KEY15). The maximum value is 127. GUI will keep 127
if input value is over 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.
Put mouse on corresponding box, for example in KEY0, will show a table in the red box as shown in Figure 19.
