MPLAB is used as the programming software and c language is used as the programming language. To interface RF module with microcontroller, Universal Synchronous and Asynchronous Receiver and Transmitter (USART) or also known as Serial Communications Interface is used. USART is used for transmit and receive serial data. The operation of USART can be divided into two types which is synchronous and asynchronous. Synchronous mode uses a clock and data line. Asynchronous mode does not use clock accompanying the data. Asynchronous mode will be use in interfacing the RF module with the microcontroller. Table below show the register and flag bit that will be used together with its description.
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