Part 01- Examples Based on Memory representation Techniques Byte Addressable and Word Addressable.

Part 01- Examples Based on Memory representation Techniques Byte Addressable and Word Addressable.

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Memory Representation Techniques: Byte Addressable & Word Addressable

In computer architecture, memory can be organized in two primary ways:

1. Byte Addressable Memory

2. Word Addressable Memory

Each method defines how data is stored and accessed in memory.

 1. Byte Addressable Memory

 In byte addressable memory, each individual byte (8 bits) has a unique memory address.
 This is the most commonly used method in modern computers.
 Used in systems with 8-bit, 16-bit, 32-bit, and 64-bit processors.

Example:
Assume a memory system with 4-byte (32-bit) words stored in byte-addressable memory.

• Here, each byte has its own address (1000, 1001, etc.).

• If the processor is 32-bit, it fetches 4 bytes (one word) at a time.

 To fetch a word (4 bytes) at address 1000, the system reads:

$$\text{Word}=[1000,1001,1002,1003]$$

 2. Word Addressable Memory

 In word addressable memory, each word (not byte) has a unique address.
 A word consists of multiple bytes (e.g., 2, 4, or 8 bytes).
 Used in older computer architectures like Digital Signal Processors (DSPs).

Example:
Assume a 16-bit system with 2-byte words stored in word-addressable memory.

 Each word address refers to multiple bytes.
 If we request Word 1001, we get [30, 40].

 Difference Between Byte & Word Addressable Memory

Summary

Byte Addressable Memory → Each byte has an address (used in modern computers).
Word Addressable Memory → Each word (2, 4, or 8 bytes) has an address (used in older architectures).

Would you like more numerical examples or detailed diagrams?

Part 01- Examples Based on Memory representation Techniques Byte Addressable and Word Addressable.

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यहाँ Part 01: Examples Based on Memory Representation Techniques – Byte Addressable and Word Addressable Memory का विस्तारपूर्वक और आसान हिंदी में स्पष्टीकरण दिया गया है:

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Part 01: Memory Representation Techniques – Byte Addressable & Word Addressable

कंप्यूटर में डेटा को मेमोरी में संग्रहित (store) करने के लिए दो मुख्य तरीके होते हैं:

1⃣ Byte Addressable Memory

2⃣ Word Addressable Memory

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1. Byte Addressable Memory क्या होता है?

• इसमें हर एक byte का अलग address होता है।

• मान लीजिए एक word = 4 bytes का है, तो एक word के लिए 4 लगातार byte addresses इस्तेमाल होते हैं।

Example:

मान लीजिए word size = 4 bytes

पूरा word = A1 A2 A3 A4
Starting address of the word = 1000

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2. Word Addressable Memory क्या होता है?

• इसमें हर word का एक unique address होता है।

• एक word में कई bytes हो सकते हैं (जैसे 2 bytes, 4 bytes etc.)

Example:

मान लीजिए word size = 4 bytes

Word address 100 का मतलब है bytes 0–3
Word address 101 का मतलब है bytes 4–7

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Byte Addressable vs Word Addressable – तुलना (Comparison)

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Important Concept: Number of Addressable Units

If memory size = 1 KB (1024 Bytes), and word size = 4 bytes:

• In byte addressable memory:

  • Total addresses = 1024 (one for each byte)

• In word addressable memory:

  • Total addresses = 1024 / 4 = 256 (one for each word)

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Practice Example Question:

Q. A system has 16-bit word and uses word-addressable memory. How many addresses are needed to access 4 KB of memory?

4 KB = 4096 Bytes
1 word = 2 bytes
Number of words = 4096 / 2 = 2048 words

Answer: 2048 addresses needed

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अगर आप चाहें, तो मैं इस टॉपिक पर आधारित MCQs, PDF Notes, या Visual Diagrams भी बना सकता हूँ। क्या आप वह चाहेंगे?

Part 01- Examples Based on Memory representation Techniques Byte Addressable and Word Addressable.

Chapter Two: Memory Locations and Addressing