Memory Mapped I/O Quiz and Flashcards: Computer Architecture

Study Notes

Memory and Input/Output

The main disadvantage of Memory Mapped I/O is not specified in the provided text.

Memory Types and Access

In Memory Mapped I/O, an address accessed by the CPU can refer to a portion of physical RAM or a peripheral device.
In the ATmega32 microcontroller, memory locations address the internal data SRAM.

ROM Types

One type of ROM is programmed by the manufacturer and has a low production cost due to the manufacturing process used.

DRAM and SRAM Comparison

The main distinguishing feature between DRAM and SRAM is that DRAM needs to be refreshed periodically, while SRAM does not.
SRAM has high data retention, meaning it retains data as long as power is supplied, whereas DRAM loses data if not refreshed.
SRAM is faster but has lower density compared to DRAM.
The main disadvantage of SRAM compared to DRAM is its higher cost.

Memory Organization

The Stack serves as a region of memory that stores data and program instructions temporarily while they are being executed.

SRAM and DRAM Structures

The structures of SRAM and DRAM differ: SRAM uses flip-flops to store data, while DRAM uses capacitors to store electrical charges.

Description

This quiz covers the concept of Memory Mapped I/O in computer architecture, where the same address bus is used to address peripherals, CPU registers, and memory. It explains how accessing addresses by the CPU can refer to physical RAM or peripherals control registers, and the need to reserve areas for I/O devices.