Universal Remote Control R7 - SPECS SHEET Manual de usuario descargar pdf (Pagina 6)

S3F80KB_AN_REV 0.00 (Preliminary Spec) IR REMOTE CONTROLLER

1.2 IR SIGNAL

All remote controller manufactures define IR protocol which is specified on their products or companies. This

application note describes example of IR protocol. This IR protocol determines the bit 1 and 0 by pulse distance.

Carrier freuqeuncy is 37.9kHz and the frame period is 108ms. Leader is the start of frame. Following custom code

is remote controller manufacture's customer code. It consists of 2 Bytes which is same each bytes. Data code and

Data bar which is complemented Data code is sequentially transmitted. Last the end bit is transmitted.

The example protocol is shown Figure 1 below. (Custom code: 0x07H, Datacode: 0x02H)

Leader Custom Custom Data Data

End

Bit

...

4.5ms 4.5ms

.. ..

0.56ms 0.56ms 0.56ms 1.69ms

8.8us 17.6us

carrier frequency: 37.9kHz

Data : 0

Data : 1

Leader

108ms 108ms

LSB MSB LSB MSB LSB MSB LSB MSB

Figure 1. IR Signal

1 2 3 4 5 6 7 8 9 10 11 ... 30 31

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Universal Remote Control R7 - SPECS SHEET Manual de usuario Pagina 6