![]() Here the ‘0’ bit represent as start bit which is initiated the serial communication. The wave form showed the protocol of the UART. The data communication of UART is made by 11 bit blocks. It consists of 2 channel transmitter and Receiver. ![]() In order to communicate between FPGA and PC with different voltage level, MAX3232 Driver IC is required. On PC Side RS232 Port voltage range from -15v to +15v. Serial data communicate on FPGA side range in 0 to 3.3v. Serial Communication consist of 2 lines Transmitter and Receiver pin. For example Spartan3 FPGA Image Processing Boardtransmit data at the baud rate of 9600 and at the receiving end PC need to be set with same baud rate using HyperTerminal or TeraTerminal. Transmitter and receiver need to be maintained in the baud rate. It includes Start bit, Data byte, Parity bit and Stop bit. Baud rate describes the total number of bit sent through serial communication. In the UART communication data transmission speed is measured by Baud Rate. As the entire processes require no clock input from source hence it is termed as asynchronous communication. UART transmit bytes of data sequentially one bit at a time from source and receive the byte of data at the destination by decoding sequential data with control bits. The function of UART is conversion parallel data (8 bit) to serial data. UART Stands for Universal Asynchronous Transmitter Receiver.
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