Sony CXD5602 User Manual page 269

E.g.: When UCOUNT0==2/UCOUNT1==4/DELAY_SMAPLE_R==0
A Rise interrupt occurs when Upper data is input two samples in a row, and Upper data continues for three
samples after.
When Upper data is input two samples in a row, and Lower data continues for LCOUNT0 times or more
within three samples, the UCOUNT conditions are not referenced and the continuous match count of
UCOUNT1 returns to its initial value.

The startup condition of the counter which counts delay time is set as shown below.
((UCOUNT0 ≥ 1 and UCOUNT1==0 and the results of status continuity determination 0 is
"Upper") or (UCOUNT0 ≥ 1 and UCOUNT1 ≥ 1 and the results of status continuity
determination 1 is "Upper"))
When DELAY_SAMPLE_R ≥ 1

When the startup condition of the counter written above is satisfied, the DELAY_SAMPLE_R counter turns
to operation state, and regardless of the input data, a Rise interrupt occurs after the DELAY_SAMPLE_R
sample, and the DELAY_SAMPLE_R counter enters a stop state.
E.g.: When UCOUNT0=2/UCOUNT1=0/DELAY_SMAPLE_R=7 and the detection result is Lower for two
consecutive times, a Rise interrupt occurs after seven sample times regardless of the detection result that
follows.
E.g.: When UCOUNT0=2/UCOUNT1=4/DELAY_SAMPLE_R=2 and the detection result is Upper for two
consecutive times, "Status Continuity Determination 0" is Upper and this state is held four times (after status
changes to "Upper", the detection result is Upper for three consecutive times), a Rise interrupt occurs after
two sample times regardless of the detection result that follows.
After Upper data is input two samples in a row, and the Lower data continues for LCOUNT0 times or more
within three samples, the UCOUNT conditions are not referenced and the count of the status continuity
determination of UCOUNT1 returns to its initial value.

Delay counter startup triggers that occur during the counter operation of DELAY_SAMPLE_R are
ignored.
The Fall interrupt operates in the same way (the settings are exchanged between UCOUNT<-->LCOUNT, the
detection results of the Upper part are re-read as Lower, and DELAY_SAMPLE_R is re-read as
DELAY_SAMPLE_L).
[Caution] Do not enter a negative value for the excess detection. The detection result will be incorrect.
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CXD5602 User Manual