Question

Explain the function of the following pin of 8085:

HLDA

Explain the function of the following pin of 8085 Micro-processor:

HLDA

Answer 1

1. It indicates HOLD ACKNOWLEDGEMENT.
2. A HLDA output informs a peripheral that a HOLD request has been received and that the microprocessor will release control of the buses in the next clock cycle.
3. After the HOLD request is removed, HLDA drops.