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
∆