Time Stamp Function Triggered By Evin Pin Input - Epson RX8111CE Applications Manual

RX8111CE

14.8.3. Time stamp function triggered by EVIN pin input

Following registers control time stamp function triggered by EVIN pin input.
1) ETS bit (Enable Time Stamp)
This register controls time stamp (triggered by EVIN pin input) ON/OFF. Also, user can use chattering prevention function. User
should be aware that chattering prevention results in the worse resolution. (refer to ET1, ET0bit.)
ETS
Write / Read
Refer to RTC internal status trigger time stamp function registers respectively.
2) EVF bit (Event Flag)
This register is be set to "1" when event occurs.
EVF
Write
Read
3) EIE bit (Event Interrupt Enable)
This register control /INT interrupt output at the moment of the event (EVF, "0" → "1").
EIE
Write
4) EHL bit (EVIN High/Low)
This register controls EVIN input voltage level.
Longer EVIN input than chattering prevention cycle is detected.
EHL
Write / Read
Table 51 ETS bit (Enable Time Stamp)
Data Description
0 Time Stamp function OFF
1 Time Stamp function ON
Table 52 EVF bit (Event Flag)
Data Description
In case /INT: "L" output, it is set to Hi-Z.
0
Invalid (writing "1" will be ignored)
1
−
0
EVIN input is detected. The result remains until clearing to "0".
1
Table 53 EIE bit (Event Interrupt Enable)
Data Description
1 ) No /INT interrupt output (/INT = Hi-Z)
0
2 ) Releasing /INT interrupt output
1
/INT interrupt output
Table 54 EHL bit (EVIN High/Low)
Data Description
0 Triggered by Low level voltage
1 Triggered by High level voltage
(/INT = Hi-Z → " L")
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(/INT = "L" → Hi-Z)
ETM61E-01