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Microprocessors & Microcontrollers8051 Interfacing

During external memory access, 8051 Port 2 commonly carries?

  • AHigh-order address byte
  • BOnly low-order data
  • CTimer overflow
  • DSerial receive data only
Report an error
Correct Answer: A. High-order address byte
Explanation: Port 2 supplies A8-A15 when the 8051 accesses external memory.
Reference: Standard microprocessors and microcontrollers: 8051 interfacing
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