UPD63 NEC [NEC], UPD63 Datasheet - Page 61

• Manufacturer Part Number: UPD63
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC [NEC]

APPENDIX C. EXAMPLE OF REMOTE-CONTROL TRANSMISSION FORMAT
REM output
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
Remark If the key is repeatedly pressed, the power consumption of the infrared light-emitting diode (LED) can
(2) Enlarged waveform of <1>
(3) Enlarged waveform of <3>
REM output
(4) Enlarged waveform of <2>
REM output
be reduced by sending the reader code and the stop bit from the second time.
(in the case of NEC transmission format in command one-shot transmission mode)
Leader code
9 ms
58.5 to 76.5 ms
13.5 ms
< 1 >
4.5 ms
< 3 >
108 ms
9 ms
9 ms
Leader code
11.25 ms
Custom Code
8 bits
13.5 ms
18 to 36 ms
< 2 >
Custom Code'
58.5 to 76.5 ms
2.25 ms
8 bits
4.5 ms
108 ms
1.125 ms
0.56 ms
Stop bit
Data code
0.56 ms
8 bits
0
2.25 ms
1
27 ms
PD63, 63A, 64
Data Code
1
8 bits
0
0
Stop bit
1 bit
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