Q7Microprocessor and Interfaces
Question
4 marks
Explain the concept of memory interfacing techniques.
Answer
Memory interfacing techniques determine how the microprocessor selects specific memory chips.
Memory interfacing techniques determine how the microprocessor selects specific memory chips using address lines.
- Absolute Decoding: All address lines are used. Provides a unique, non-overlapping address range for each memory chip.
- Linear Decoding: Uses specific higher-order address lines directly connected to Chip Select pins. It is simpler but causes address folding (multiple addresses accessing the same location).
- Even and Odd Banking: In the 8086, memory is divided into an even bank (accessed via D0-D7, A0=0) and an odd bank (accessed via D8-D15, BHE=0), allowing 8-bit or 16-bit data transfers.