The following image describes the problem: Processor 1 has no RS232 channel, but has an SPI one, so we used a UART driver and a level translator ICs. The two processors are on separate boards, and ...
I have a design which expects a TTL level square wave from a radio reciever which is fed into a microcontroller. There is some TTL level noise as no encoding is done on the transmit end. I was ...