Problem no.1 Interfacing I/O Devices with 8085

TL;DR

Learn how to interface an 8-bit dip switch with the 8085 microprocessor using peripheral mapped input/output interfacing.

Transcript

so our problem is we have to interface an 8 bit dip switch with the 8085 such that the address assigned to the dip switch is f 0 h so let's try to solve this problem now dip switch we want to read from we want to give an output to this so we will use the in instruction and if you can see in the question it is given that the address assigned to the ... Read More

Key Insights

• 🫥 The 8085 microprocessor has 16 address lines, of which 8 are used for the address of the input/output device.
• 🫠 The combination of input/output and m bar signals is used for read operations.
• ❓ A buffer is used to enable the reading of data from the dip switch.

Questions & Answers

Q: What is the address assigned to the dip switch?

The address assigned to the dip switch is f0h.

Q: Why is peripheral mapped input/output interfacing used?

Peripheral mapped input/output interfacing is used because an 8-bit address has been assigned to the input/output device.

Q: How is the data from the dip switch read?

The data from the dip switch is read using the input/output and m bar signals, with the read operation being involved.

Q: Where is the data from the dip switch stored?

The data from the dip switch is stored in the accumulator.

Summary & Key Takeaways

• The problem is to interface an 8-bit dip switch with the 8085 microprocessor, with the address assigned to the dip switch being f0h.

• Peripheral mapped input/output interfacing is used because an 8-bit address has been assigned to the input/output device.

• The data from the dip switch is read using the input/output and m bar signals, and the data is stored in the accumulator.