PD64A_15 Datasheet, PDF (61/66 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS FOR INFRARED REMOTE CONTROL TRANSMISSION

(5) Carrier waveform (enlarged waveform of each code’s high period)
µPD64A, 65
REM output
8.77 µs
(6) Bit array of each code
26.3 µs
9 ms or 0.56 ms
Carrier frequency: 38 kHz
Leader code
C0 C1 C2 C3 C4 C5 C6 C7 C0' C1' C2' C3' C4' C5' C6' C7' D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7
C0 C1 C2 C3 C4 C5 C6 C7
or or or or or or or or
Co C1 C2 C3 C4 C5 C6 C7
Custom code
Custom code,
Data code
Data code
Caution To prevent malfunction with other systems when receiving data in the NEC transmission
format, the total 32 bits of the 16-bit custom codes (Custom code, Custom code’) and the
16-bit data codes (Data code, Data code) must not only be fully decoded (make sure to check
Data code as well) but also checked to make sure that no signals are present.
Data Sheet U14380EJ3V0DS00
59