INTEL 8251A(USART)....(points to remember)

Block diagram of the 8251 USART (Universal Synchronous Asynchronous Receiver Transmitter)

The 8251 is a USART (Universal Synchronous Asynchronous Receiver Transmitter) for serial data communication. As a peripheral device of a microcomputer system, the 8251 receives parallel data from the CPU and transmits serial data after conversion. This device also receives serial data from the outside and transmits parallel data to the CPU after conversion.





                                        operation between a CPU and the device.