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Multi Channel UART Controller Using FIFO

In this project, a universal asynchronous receiver and transmitter (UART) are described, which is basically a serial data transmission protocol used in digital circuit applications. The architecture of the UART transmitter has a baud rate generator, parity generator, transmitter finite state machine (FSM) and parallel in serial out register (PISO). UART receiver has a baud rate generator, negative edge detector, parity checker, receiver finite state machine (FSM) and serial in parallel out (SIPO) register. The baud rate generator of both transmitter and receiver is the same, so the baud rate of transmitter/receiver is the same. Baud rate generator is the same as the frequency divider circuit. The data frame of the UART transmitter is 1 start bit, 8 transmits data bits, 1 parity bit and 1 stop bit. The baud rate of the transmitter and receiver is 4 Mbps using the system clock of 64 MHz’s. Keywords: UART, Baud Rate Generator, Asynchronous FIFO, Simulation