Maximum Memory Interface for 8085 Microprocessor

The maximum memory that can be interfaced to an 8085 microprocessor is 64 KB. This is because the 8085 microprocessor uses a 16-bit address bus, which can address up to 64 KB of memory.

Explanation:

The 8085 microprocessor has a 16-bit address bus, which means it can address up to 2^16 (or 65,536) memory locations. However, not all of these locations are available for interfacing with memory devices. The lower memory locations (0000H to 7FFFH) are reserved for interfacing with I/O devices, leaving a maximum of 32 KB for interfacing with memory.

To interface with more memory, the 8085 microprocessor uses a technique called memory mapping. This involves mapping memory locations to different memory devices, allowing the microprocessor to access more memory.

For example, if we want to interface with 64 KB of memory, we can use two 32 KB memory devices and map them to different address ranges. The first memory device can be mapped to memory locations 0000H to 7FFFH, and the second memory device can be mapped to memory locations 8000H to FFFFH. This allows the microprocessor to access up to 64 KB of memory.

Conclusion:

In conclusion, the maximum memory that can be interfaced to an 8085 microprocessor is 64 KB. This is because of the 16-bit address bus, which can address up to 65,536 memory locations, but only 32 KB is available for interfacing with memory devices. Using memory mapping techniques, we can interface with more memory by mapping memory locations to different memory devices.