UPD65 datasheet(58/64 Pages) NEC

58 / 64 page

µPD64A, 65

Data Sheet U14380EJ2V0DS00

APPENDIX C. EXAMPLE OF REMOTE-CONTROL TRANSMISSION FORMAT

(in the case of NEC transmission format in command one-shot 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

108 ms

< 1 >

< 2 >

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>

REM output

13.5 ms

Leader code

9 ms

4.5 ms

Custom Code

8 bits

Custom Code'

8 bits

Data code

8 bits

Data Code

8 bits

27 ms

18 to 36 ms

58.5 to 76.5 ms

Stop bit

1 bit

< 3 >

(3) Enlarged waveform of <3>

REM output

9 ms

13.5 ms

4.5 ms

2.25 ms

1.125 ms

0.56 ms

(4) Enlarged waveform of <2>

REM output

9 ms

11.25 ms

2.25 ms

0.56 ms

Stop bit

Leader code

UPD65 Datasheet(PDF) 58 Page - NEC

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