NEC PD78F9488 - Manual (Page 282)

CHAPTER 15 REMOTE CONTROLLER RECEIVER ( µ PD789489, 78F9489 ONLY)
User’s Manual U15331EJ4V1UD
282
(3) Data high level width determination
Relationship Between
RMDH0S/RMDH0L/RMDH1S/RMDH1L/Counter
Position of Waveform Corresponding Operation
Counter < RMDH0S <1>: Short Error interrupt INTRERR is generated.
Measuring the guide pulse high-level width is started
at the next rising edge.
RMDH0S ≤ counter < RMDH0L <2>: Within the range Data 0 is received.
Measuring data low-level width is started.
RMDH0L ≤ counter < RMDH1S <3>: Outside of the
range Error interrupt INTRERR is generated.
Measuring the guide pulse high-level width is started
at the next rising edge.
RMDH1S ≤ counter < RMDH1L <4>: Within the range Data 1 is received.
Measuring the data low-level width is started.
RMDH1L ≤ counter <5>: Long Error interrupt INTRERR is generated at the ∆ point.
Measuring the guide pulse high-level width is started
at the next rising edge.
RIN
RMDH0S
RMDH0L
Allowable
range
<1> <2> <3>
RIN
RIN
RMDH1S
RMDH1L
RIN
RIN
<5> <4>
Allowable
range
∆