The circuit in Figure 9-8 is defective; data is not appearing on the output lines. A check with the scope shows data pulses on the serial data line and multiplex control lines, S0–S2; no parity error is indicated. A further check with a logic probe indi

1. 

The circuit in Figure 9-8 is defective; data is not appearing on the output lines. A check with the scope shows data pulses on the serial data line and multiplex control lines, S0–S2; no parity error is indicated. A further check with a logic probe indicates that Vcc and ground appear to be present. What might be wrong with the circuit?
[A]. The demultiplexer may be bad.
[B]. The parity checker is defective.
[C]. The parity generator may be bad.
[D]. The parity checker is defective, or the parity generator may be bad.

Answer: Option A

Explanation:

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