Design and Simulation of Multi Channel UART for Serial Communication
To meet the modern operation microcontroller and digital signal processor we need desired system performance. But in actual process, it is very difficult to attain desired result, since it depends on various factors. Communication is vital factor which affect the performance of system. UART is a kind of serial communication circuit most widely used. In parallel communication process we need more address and data lines. So it is limited to short distance. When compared with parallel communication, serial communication has more advantage [1]. It need less transmission lines, low distortion, high reliable and very much useful for long distance transmissions. A UART is a integrated circuit which plays the most important vital role in serial communication. This serial communication process is much suited for long distance data transmission because of less transmission lines [2]. But to meet the modern complex communication need with different baud rates, a single channel UART is not sufficient. Since this single channel UART operated with specific baud rate. The data loss may happen in the communication process due to difference in speeds which may leads to bit error. To overcome the above difficulty a multi channel UART is proposed in the paper. A multi channel UART internally consists of 4 single channel UART which were operated with different baud rate. This multi channel UART facilitates the user to select UART form the multiple UART based on the requirement. This process reduced delay because of in built buffer i.e. FIFOs also introduced in this multi channel UART. And one more advantage in this 4 UART can operate parallel i.e. more devices can able to communicate with the pc randomly
