PD64A_15 Datasheet, PDF (60/66 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS FOR INFRARED REMOTE CONTROL TRANSMISSION

µPD64A, 65
APPENDIX C. EXAMPLE OF REMOTE-CONTROL TRANSMISSION FORMAT
(in the case of NEC transmission format in one-shot command transmission mode)
Caution When using the NEC transmission format, please apply for a custom code at NEC.
(1) REM output waveform (from <2> on, the output is made only when the key is kept pressed)
REM output
58.5 to 76.5 ms
<1>
108 ms
<2>
108 ms
Remark If the key is repeatedly pressed, the power consumption of the infrared light-emitting diode (LED) can
be reduced by sending the reader code and the stop bit from the second time.
(2) Enlarged waveform of <1>
<3>
REM output
9 ms 4.5 ms
13.5 ms
Leader code
Custom code
8 bits
Custom code,
8 bits
18 to 36 ms
58.5 to 76.5 ms
Data code
8 bits
Data code
8 bits
27 ms
Stop bit
1 bit
(3) Enlarged waveform of <3>
REM output
9 ms
13.5 ms
(4) Enlarged waveform of <2>
4.5 ms
0.56 ms
1.125 ms 2.25 ms
0
1
1
00
REM output
9 ms
11.25 ms
Leader code
2.25 ms
0.56 ms
Stop bit
58
Data Sheet U14380EJ3V0DS00