Difficulty: Easy
Correct Answer: a buffer that can operate in both directions
Explanation:
Introduction / Context:
Transceivers are widely used on shared data buses to allow bidirectional data movement while preventing contention. Understanding their role is essential for bus-oriented microprocessor and FPGA designs.
Given Data / Assumptions:
Concept / Approach:
Transceiver = transmitter + receiver in one device. It typically has direction control (DIR) and output enable (OE). When DIR selects A→B, the device drives from side A to side B; when toggled, it drives from B→A. OE places outputs in high-impedance when disabled, isolating the device from the bus.
Step-by-Step Solution:
Verification / Alternative check:
Common TTL/CMOS parts such as 74xx245 are marketed as 'octal bus transceivers' and include DIR and OE pins; their datasheets confirm bidirectional buffering as the primary function.
Why Other Options Are Wrong:
Common Pitfalls:
Final Answer:
a buffer that can operate in both directions
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