sgreen
Junior Member level 3
In case of serial communication(using ATmega32A) first I have to initialize USART and do code for serial Tx/Rx. In hardware,is Tx/Rx pin always in 5V or logic1?
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When we talking about a TTL level USART, then yes, the idle state of both (Rx and Tx) pins is high as usual; a MAX232 (if any) will be inverted them.In case of serial communication(using ATmega32A) first I have to initialize USART and do code for serial Tx/Rx. In hardware,is Tx/Rx pin always in 5V or logic1?
When we talking about a TTL level USART, then yes, the idle state of both (Rx and Tx) pins is high as usual; a MAX232 (if any) will be inverted them.
If you send 10011000 then you get data comes out of the Tx pin like first the 0th bit comes out and 7th bit is the last to come out. Whenever logic zero is transmitted the Tx pin is internally grounded.