Receive timing signal generation circuit diagram

As can be seen from the figure, it is similar to sending timing signals, and the method of generating timing signals is also the same, so the waveforms are omitted. It should be pointed out that the function of U213:A, B ( 74LS04 ) and U203:B (74LS74) is to shape and output the received digital baseband signal .

The function of U213:D, E ( 74LS04 ), U210:A (74LS08), U208:D, E (74LS08) is to use the receive enable signal (generated by software) to output the strobe of the receive clock 1024KHz.