CHAPTER 15 REMOTE CONTROLLER RECEIVER (
µ
PD789489, 78F9489 ONLY)
User’s Manual U15331EJ4V1UD
279
15.4 Operation of Remote Controller Receiver
The following remote controller reception mode is used for this remote controller receiver.
•
Type A reception mode with guide pulse (half clock)
15.4.1 Format of type A reception mode
Figure 15-4 shows the data format for type A.
Figure 15-4. Example of Type A Data Format
RIN
INTDFULL
Guide pulse
INTGP
RMER
Data
“0”
Data
“1”
0.6 ms
1.8 ms
1.2 ms
2.4 ms
INTRIN
INTREND
RMDLL
Data
“1”
Data
“0”
Data
“0”
Data
“0”
Data
“0”
Data
“0”
Data
“0”
15.4.2 Operation flow of type A reception mode
Figure 15-5 shows the operation flow.
Cautions 1. When INTRERR is generated, RMSR and RMSCR are automatically cleared immediately.
2. When data has been set to all the bits of RMSR, the following processing is automatically
performed.
•
The value of RMSR is transferred to RMDR.
•
INTDFULL is generated.
•
RMSR is cleared.
RMDR must then be read before the next data is set to all the bits of RMSR.
3. When INTREND has been generated, read RMSCR first followed by RMSR.
When RMSR has been read, RMSCR and RMSR are automatically cleared.
If INTREND is generated, the next data cannot be received until RMSR is read.
4. RMSR, RMSCR, and RMDR are cleared simultaneously to operation termination (RMEN
=
0).
