Posted by dapj20 on Mar 20, 2018 in 80C31-SBC, Embedded-Systems
This is the standard configuration on how to Interface a uC like 8051 to PC RS232 with MAX232A. The UART or Serial port was not present in 8049/8749 chips which were the ancestors of 8051/8031. Pages of code were needed to make a software UART in… more »