Infrared Remote Control Protocol-NEC Protocol

To facilitate understanding, the waveform is the signal from the infrared receiver, which is the opposite of the signal level (0 or 1) described in the Protocol.

The NEC protocol is one of the many infrared remote control protocols. In addition to NEC, there are other protocols such as RC5 and rc6. Most of the non-learning universal TV remote control devices I bought on the market integrate one or more codes of the NEC type. Three or more codes of the two remote control devices I bought are nec.

A frame of NEC code (usually the data sent by clicking the remote control button) consists of a guide code, address code, and data code, as shown in, the inverse function of the address code and data code is to enhance the correctness of the data.

As shown in the definition of the Guide code and data, when you hold down a button, the Guide code (repeated) will be sent once every MS without any data

The following is the waveform collected with an oscilloscope that keeps holding down a button:

Click the waveform of the button:

To facilitate understanding, the waveform is the signal from the infrared receiver, which is the opposite of the signal level (0 or 1) described in the Protocol.

The NEC protocol is one of the many infrared remote control protocols. In addition to NEC, there are other protocols such as RC5 and rc6. Most of the non-learning universal TV remote control devices I bought on the market integrate one or more codes of the NEC type. Three or more codes of the two remote control devices I bought are nec.

A frame of NEC code (usually the data sent by clicking the remote control button) consists of a guide code, address code, and data code, as shown in, the inverse function of the address code and data code is to enhance the correctness of the data.

As shown in the definition of the Guide code and data, when you hold down a button, the Guide code (repeated) will be sent once every MS without any data

The following is the waveform collected with an oscilloscope that keeps holding down a button:

Click the waveform of the button: