Consider the circuit of Figure 9-24. A test of the circuit yields the results shown in Table
Question:
Consider the circuit of Figure 9-24. A test of the circuit yields the results shown in Table 9-10. What are the possible causes of the malfunction?
Figure 9-24
Table 9-10
Transcribed Image Text:
COUNTER SELECT TC QDQC QB QA SIE CE Tens BCD CLK counter Counter 1 EN TENS TC 4₁ 74ALS157 lo MUX (tens) Zo Zo Zo Z₂ Units BCD CLK 8 LED display counter BCD-to-7-segment decoder/driver (7447) QDQC QB QA -Clock #1 M EN 1 41 S 0 Iш E 1₁ e TC UNITS Tens BCD CLK< counter Za Zo Zo Za QD QCQB QA 74ALS157 lo MUX (units) Counter 2 EN BCD-to-7-segment decoder/driver (7447) 8 LED display TC Units BCD CLK counter EN QDQC QB QA 1 -Clock #2 M
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Related Book For
Digital Systems Principles And Application
ISBN: 9780134220130
12th Edition
Authors: Ronald Tocci, Neal Widmer, Gregory Moss
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