PIC18, MPLAB X IDE, XC8, UART, rx_interrupt echo 버전입니다. 0. 참고 사항[ ] https://www.microchip.com/wwwproducts/en/PIC18F4520[ datasheet ] http://ww1.microchip.com/downloads/en/devicedoc/39631a.pdf 1. HW 연결2. 소스 설명full 소스는 아래 github를 통해 확인하세요. 4MHz, 19200 baudrate //#pragma config OSC = INTIO67 #pragma config OSC = HS //void __interrupt(high_priority) isr_low (void) void __interrupt(low_priority) isr_..