Problem no 1 on Memory Map & Addresses - Tri State Logic Devices and Memory - Microprocessor

TL;DR

Learn how to determine the number of address lines needed to address memory chips of different sizes.

Transcript

hello friends in this video we will solve a problem on how to calculate the memory address lines of a chip that is how to find out the memory address range of a chip so let's have a problem so our problem is to find out the number of address lines which are required to address the memory and the memory size is given to us first we have the 256 regi... Read More

Key Insights

• 🫥 The formula log₂(2^x) = log₂(n) can be used to calculate the number of address lines for different memory sizes.
• 🫥 The address lines needed depend on the number of registers in the memory chip.
• 🫥 The address range of a chip is determined by the values of the individual address lines.
• 🫥 The chip select signal and certain address lines are kept at specific logic states.

Questions & Answers

Q: How do you calculate the number of address lines needed to address memory chips?

To calculate the number of address lines, use the formula log₂(2^x) = log₂(n), where x is the number of address lines and n is the number of registers.

Q: What is the address range of a chip with 256 registers?

The chip with 256 registers requires 8 address lines. The address range is from A0 to A7, while A8 to A15 are connected to the chip select signal and kept at logic 0.

Q: How many address lines are required for an 8 kilobyte memory?

An 8 kilobyte memory requires 13 address lines. A0 to A12 are used to select the chip, while A13 to A15 are connected to the chip select signal and kept at logic 0.

Q: What are the address lines needed for a 4 kilobyte memory?

A 4 kilobyte memory needs 12 address lines. A0 to A11 are used for addressing, while A12 to A15 are connected to the chip select line and kept at logic 0.

Summary & Key Takeaways

• The video explains how to calculate the number of address lines required to address different memory sizes.

• It uses the formula log₂(2^x) = log₂(n), where x is the number of address lines and n is the number of registers.

• The example given includes a chip with 256 registers, an 8 kilobyte memory, and a 4 kilobyte memory.