The synchronous data transmission system of Figure 9-32 and Figure 9-33 is malfunctioning. An oscilloscope is used

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The synchronous data transmission system of Figure 9-32 and Figure 9-33 is malfunctioning. An oscilloscope is used to monitor the MUX and DEMUX outputs during the transmission cycle, with the results shown in Figure 9-82. What are the possible causes of the malfunction?


Figure 9-82

Transmit data DEMUX output: Oo 8 0 0 1 1 I A I 1 A 1 1 1 1 1 1 A3 1 1 1 1 T 1 1 Bo B 1 1 1 1 18 B T T I B3 |


Figure 9-32

Id A Id_B Id_C Id_D Clock Transmit PISO registers AAAA B Ba|B| Bo C C C C D D D D Shift_enable FF2 J CLK 4 K

Figure 9-33

transmit data Clock Transmit FF2 J CLK4 K 1 DEMUX Oo Four-output demultiplexer - S 0 03 So Q QCLK TC MOD-4 EN

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Digital Systems Principles And Application

ISBN: 9780134220130

12th Edition

Authors: Ronald Tocci, Neal Widmer, Gregory Moss

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