IS31SE5117 EVB User Manual
Lumissil Microsystems – www.lumissil.com
19
Rev. B, 10/25/2020
calibration. Then the touch button can be used after being affected by the water drop.
6.2
AUTO_CLEAR_INT_SET
:
Auto-Clean Interrupt
As shown in Figure 25 below,
Figure 25: AUTO_CLEAR_INT_SET option
AUTO_CLEAR_INT_ENABLE is auto-clean interrupt function. Checking is enable.
AUTO_CLEAR_INT_TIME is auto-clean interrupt time to choose. Unit is milisecond.
When AUTO_CLEAR_INT_ENABLE is disabled, only reading 02h and 03h registers will releae the INTB pin,
otherwise it will keep low.
Figure 26: INTB action when AUTO_CLEAR_INT_ENABLE is disabled
When AUTO_CLEAR_INT_ENABLE is enabled, INTB pin will be released by reading 02h (Key Status Register1)
and 03h (Key Status Register2) registers. If 02h and 03h registers are not be read within programmed time
AUTO_CLEAR_INT_TIME (10ms~200ms), then IS31SE5117 will release INTB pin after
AUTO_CLEAR_INT_TIME time expired.
Key Release
Key Press
Key Release
INT
INT
AUTO_CLEAR_INT_ENA
BLE=DISABLE
If I2C no read 02h, 03h
AUTO_CLEAR_INT_ENA
BLE=DISABLE
If I2C read 02h, 03h
Read 02h, 03h
Read 02h, 03h