Question

ALE line of an 8085 microprocessor is used for _______________.

• A. latch the output of an I/0 instruction into an external latch
• B. Deactivate the chip select signal from memory devices
• C. Latch the 8 bits of address lines AD7-ADO into an external latch
• D. Find the interrupt enables status of the TRAP interrupt

Answer 1

The correct option is C Latch the 8 bits of address lines AD7-ADO into an external latch

ALE line of an 8085 microprocessor is used for latch the 8 bits of address lines AD7-ADO into an external latch.

ALE stands for address latch enable. It is the 3oth pin of 8085 which is used to enable or disable the address bus. the address bus will be enabled during the 1st clock cycle as the ALE pin goes high that is logic '1' during the first half cycle.

Microprocessor 8085:-

The Intel 8085 is an 8-bit microprocessor produced by Intel and introduced in 1976. It is a software-binary compatible with the more-famous Intel 8080 with only two minor instructions added to support its added interrupt and serial input/output features.