Question
Download Solution PDFThe function of ALE signal in 8051 microcontroller is
This question was previously asked in
VSSC (ISRO) Technician B: Electronic Mechanic Previous Year Paper (Held on 10 Dec 2017)
Answer (Detailed Solution Below)
Option 2 : To control demultiplexing the address and data bus.
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Download Solution PDFALE:
The Pin 30 of 8051 microcontroller is used for ALE that is Address Latch Enable.
- It is an active-high input control signal.
- ALE signal is used for demultiplexing the multiplexed Address/Data bus of Port 0 during external memory interfacing.
- In each machine cycle, there are 2 ALE pulses
- ALE is also used to check whether the device is working or not.
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