Memory Types in Microprocessor Systems

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Questions and Answers

What is the range of addresses for locations in microprocessor systems?

0 to 65535

Which type of memory is commonly used for storing programs and data in a computer?

RAM

What does EPROM stand for?

Erasable-Programmable Read Only Memory

How is an interface defined in the context of microprocessor systems?

Interface is the path for communication between two components. Signup and view all the answers

What does a decoding circuit do in the context of microprocessors?

Selects the corresponding memory chip or I/O device based on address sent by the microprocessor. Signup and view all the answers

What is the purpose of matching memory requirements with microprocessor signals in interfacing?

To ensure proper communication between memory and the microprocessor. Signup and view all the answers

What is the purpose of address decoding in interfacing circuits?

To generate chip select signals for each device in the system Signup and view all the answers

Why is it necessary to have an appropriate address decoding strategy?

To ensure that only one memory-mapped component is accessed for a given valid address Signup and view all the answers

How does address decoding contribute to selecting the right device in a system?

By generating chip select signals from the address bus Signup and view all the answers

In what way is memory space not homogenous even if it is flat?

Different portions are used for different purposes such as RAM, ROM, and I/O Signup and view all the answers

Why is it essential for one and only one memory-mapped component to be accessed for a given valid address?

To avoid conflicts and ensure accurate data access Signup and view all the answers

What is the maximum addressable space in this example?

1024 bytes Signup and view all the answers

Where do the RAM chips come in relation to the ROM chip in the memory map?

Before the ROM chip Signup and view all the answers

What is the size of each RAM chip in this example?

128B Signup and view all the answers

Where does the memory map start for these chips?

$0000 Signup and view all the answers

What does the symbol $ signify in the memory address values provided?

Hexadecimal value Signup and view all the answers

How are the address bus lines split in a microprocessor?

Into most significant bits (MSB) for generating CS* signals and least significant bits (LSB) for internal addresses Signup and view all the answers

In the example microprocessor with 10 address lines, how many chips are needed if each chip is 128 bytes?

8 chips Signup and view all the answers

How many address lines are required to select each of the 8 chips in the microprocessor example?

3 lines Signup and view all the answers

In Full Address Decoding strategy, how are the address lines utilized?

All address lines are used to specify a memory/device's location Signup and view all the answers

What is the purpose of Partial Address Decoding in generating chip select signals?

To limit the addressable memory space implemented Signup and view all the answers

How many address lines are needed to address each internal memory cell in the 128x8 memory chips example?

$7$ lines Signup and view all the answers

What do X's represent in Partial Address Decoding?

Don't care values Signup and view all the answers

How are unused address lines filled in Partial Address Decoding?

With X's (don't cares) Signup and view all the answers

What is the purpose of Partial Address Decoding?

To identify each memory location with multiple addresses Signup and view all the answers

In Partial Address Decoding, what happens when an address line is marked with X (don't care)?

It signifies all possible values (1 or 0) Signup and view all the answers

What is the significance of 'don't cares' in memory addressing?

They simplify the addressing process Signup and view all the answers

Why are 'don't cares' used in Partial Address Decoding?

To simplify the addressing logic Signup and view all the answers

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