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Questions and Answers
What is the main reason PCs are based on DRAM according to the text?
What is the main reason PCs are based on DRAM according to the text?
- DRAM is non-volatile memory.
- DRAM is based on Floating Gate Mosfet technology.
- DRAM has a much lower cost and is needed for bigger RAM. (correct)
- DRAM provides faster data access compared to ROM.
Which memory type retains its contents even after electricity is switched off?
Which memory type retains its contents even after electricity is switched off?
- ROM (correct)
- RAM
- Cache memory
- SRAM
What is the primary function of ROM in embedded systems as per the text?
What is the primary function of ROM in embedded systems as per the text?
- To allow both read and write operations
- To store program codes and permanent data (correct)
- To provide temporary data storage
- To increase data access speed
In the context of memory types, which one of the following is a typical characteristic of RAM?
In the context of memory types, which one of the following is a typical characteristic of RAM?
What does ROM stand for in the context of embedded systems?
What does ROM stand for in the context of embedded systems?
Based on the text, which memory type is considered non-volatile?
Based on the text, which memory type is considered non-volatile?
Which memory technology is described as high density, low cost, nonvolatile, fast, and electrically reprogrammable?
Which memory technology is described as high density, low cost, nonvolatile, fast, and electrically reprogrammable?
What is the most recent advancement in memory technology according to the text?
What is the most recent advancement in memory technology according to the text?
What is the main feature of Non-Volatile RAM (NVRAM) mentioned in the text?
What is the main feature of Non-Volatile RAM (NVRAM) mentioned in the text?
How does NVRAM ensure that its contents are not lost when power is switched off?
How does NVRAM ensure that its contents are not lost when power is switched off?
What happens if the power to the Vcc pin falls below an out-of-tolerance condition for NVRAM?
What happens if the power to the Vcc pin falls below an out-of-tolerance condition for NVRAM?
Which memory type combines SRAM and EEPROM to ensure data is written into EEPROM when power is off and read back when power is restored?
Which memory type combines SRAM and EEPROM to ensure data is written into EEPROM when power is off and read back when power is restored?
What is the key feature of Static RAM (SRAM) mentioned in the text?
What is the key feature of Static RAM (SRAM) mentioned in the text?
How many transistors are typically used in an SRAM cell according to the text?
How many transistors are typically used in an SRAM cell according to the text?
What is the main advantage of SRAM over DRAM mentioned in the text?
What is the main advantage of SRAM over DRAM mentioned in the text?
In SRAM, how are data storage cells primarily constructed?
In SRAM, how are data storage cells primarily constructed?
What happens when a word line turns on in SRAM according to the text?
What happens when a word line turns on in SRAM according to the text?
Study Notes
DRAM in PCs
- DRAM is used because of its high speed and low cost
Non-volatile Memory
- Non-volatile memory retains data even when power is switched off
- An example of non-volatile memory is Flash memory
ROM in Embedded Systems
- ROM is used for storing the operating system, firmware, and other important data that should not be lost
Characteristics of RAM
- RAM is volatile, meaning data is lost when the power is turned off
- RAM is fast and accessible
ROM Acronym
- ROM stands for Read Only Memory
Non-volatile Memory Type
- Flash memory is considered non-volatile memory
Flash Memory Technology
- Flash memory is high density, low cost, nonvolatile, fast, and electrically reprogrammable
Latest Memory Technology
- The text you provided does not mention the most recent advancement in memory technology.
NVRAM Key Feature
- NVRAM (Non-Volatile RAM) retains data even when power is switched off
Data Retention in NVRAM
- NVRAM has a backup battery that provides power to the memory cells, ensuring data is preserved even when the main power supply is turned off
NVRAM Power Loss
- If power to the Vcc pin falls below tolerance, NVRAM will lose its contents
Combined Memory Type - SRAM and EEPROM
- Flash memory combines the features of SRAM and EEPROM for data storage
SRAM Key Feature
- SRAM is a volatile memory that stores data on transistors using a 6-transistor memory cell
SRAM Transistor Count
- A SRAM cell typically uses 6 transistors for data storage
SRAM Advantage over DRAM
- SRAM is faster than DRAM because it does not require refresh cycles
SRAM Data Storage Cells
- SRAM data storage cells are primarily constructed using transistors
Word Line Activation in SRAM
- When a word line turns on in SRAM, the transistors associated with that data storage cell become conductive, allowing data to be accessed.
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Description
Learn about SRAM, a volatile memory that retains data as long as electricity is supplied. Discover how SRAM works, its benefits, and its role in embedded systems.
