Podcast
Questions and Answers
What is the main disadvantage of Memory Mapped I/O according to the text?
What is the main disadvantage of Memory Mapped I/O according to the text?
- It has no impact on the memory available for applications
- It improves the speed of accessing memory for applications
- It increases the memory available for applications
- It reduces the memory available for applications (correct)
In Memory Mapped I/O, what could an address accessed by the CPU refer to, besides a portion of physical RAM?
In Memory Mapped I/O, what could an address accessed by the CPU refer to, besides a portion of physical RAM?
- Cache memory
- Peripherals' control special registers (correct)
- Secondary storage devices
- Stack Pointer Register
Which type of ROM is programmed by the manufacturer and has a low production cost due to the manufacturing process used?
Which type of ROM is programmed by the manufacturer and has a low production cost due to the manufacturing process used?
- OTP (One Time Programmable)
- SRAM (Static Random Access Memory)
- Masked ROM (correct)
- DRAM (Dynamic Random Access Memory)
What is the main distinguishing feature between DRAM and SRAM?
What is the main distinguishing feature between DRAM and SRAM?
In the ATmega32 microcontroller, which memory locations address the internal data SRAM?
In the ATmega32 microcontroller, which memory locations address the internal data SRAM?
What purpose does the Stack serve in memory units?
What purpose does the Stack serve in memory units?
What distinguishes SRAM from DRAM in terms of data retention?
What distinguishes SRAM from DRAM in terms of data retention?
Which type of RAM is faster but has lower density compared to the other?
Which type of RAM is faster but has lower density compared to the other?
What is the main disadvantage of SRAM compared to DRAM?
What is the main disadvantage of SRAM compared to DRAM?
How do the structures of SRAM and DRAM differ?
How do the structures of SRAM and DRAM differ?
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.
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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.
