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Question 3: Explain the Diagram of Interfacing Serial Data? 15 DO to D7 represent the data received and transmitted data through Rx and Tx Rx is for receiving the data from the tx The received data section includes a receive register and a shift register and a control register And the tx data section includes a transmit register shift register and also the control reg. The tx data register comprises the data bytes to be transmitted then then shift register moves the bits to the right or left till data is received