SC8521 INFRARED REMOTE CONTROL TRANSMITTER OF 8521 CODE FORMAT DESCRIPTION The SC8521 can be used in infrared remote control transmitters.
It generates output pulses, in accordance with the RC5 protocol, when a key is pressed.
The IC does not contain a software programmable processor.
However, it does contain a ROM in which the codes that have to be transmitted are stored.
The oscillator frequency may be optionally chosen as 432KHz.
For 432KHz additional external capacitors must be connected.
When a key in the key-matrix is pressed a driveline will be connected to a sense line.
This causes the oscillator to start and a corresponding code will be generated conforming to the RC5 protocol.
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