PIC Microcontroller Programming Lecture 6: Memory Organization of PIC16F877A
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Questions and Answers

What is the capacity of the program memory in the PIC 16F877 chip?

  • 14.3 Kbyte (correct)
  • 8 Kbyte
  • 24 Kbyte
  • 16 Kbyte

Which section of the PIC 16F877 memory is used to store the programs written by the user?

  • Data memory
  • Program memory (correct)
  • Data EEPROM
  • General purpose register file

In which bank is the default bank for accessing the special function register (SFR)?

  • BANK2
  • BANK3
  • BANK0 (correct)
  • BANK1

How many bytes does each bank in the special function register file (SFR) contain?

<p>32 bytes (C)</p> Signup and view all the answers

Which addressing mode uses a number or constant as an operand?

<p>Immediate addressing mode (A)</p> Signup and view all the answers

Which part of the PIC 16F877 memory is used to store non-volatile data?

<p>Data EEPROM (B)</p> Signup and view all the answers

Which addressing mode involves transferring data directly after the opcode?

<p>Memory operand addressing mode (C)</p> Signup and view all the answers

In which addressing mode is the operand a register that holds the data to be executed?

<p>Register operand addressing mode (A)</p> Signup and view all the answers

Which type of addressing mode deals with the address or the memory location?

<p>Memory operand addressing mode (D)</p> Signup and view all the answers

What type of addressing mode is convenient for manipulating data arrays located in general purpose registers?

<p>Indirect addressing (D)</p> Signup and view all the answers

Which register is used for indirect or indexed addressing of the other file registers?

<p>FSR Register (A)</p> Signup and view all the answers

Which register holds the address indicated by the FSR in indirect addressing?

<p>INDF Register (C)</p> Signup and view all the answers

What does the MOVLW instruction mean in English?

<p>'Move Literal Value Into W' (B)</p> Signup and view all the answers

What is the capacity of the status register?

<p>8 bits (D)</p> Signup and view all the answers

Which section of the PIC 16F877 memory contains the programs written by the user?

<p>Program memory (C)</p> Signup and view all the answers

What is the capacity of the data EEPROM in the PIC 16F877 chip?

<p>256 bytes (A)</p> Signup and view all the answers

Which addressing mode involves transferring data directly after the opcode?

<p>Immediate addressing mode (D)</p> Signup and view all the answers

How many bytes does each bank in the special function register file (SFR) contain?

<p>32 bytes (B)</p> Signup and view all the answers

What is the capacity of the program memory in the PIC 16F877 chip?

<p>14.3 Kbytes (D)</p> Signup and view all the answers

Which register is available in all banks and is accessible at any time, regardless of the selected bank?

<p>STATUS (C)</p> Signup and view all the answers

What type of addressing mode deals with the registers like CLR W?

<p>Register operand addressing mode (C)</p> Signup and view all the answers

Which addressing mode involves transferring data directly after the opcode?

<p>Immediate addressing (C)</p> Signup and view all the answers

What is the capacity of the FSR register?

<p>8-bit (B)</p> Signup and view all the answers

Which addressing mode is used for manipulating data arrays located in GPR registers?

<p>Indirect addressing (C)</p> Signup and view all the answers

What is the capacity of the status register?

<p>8-bit (A)</p> Signup and view all the answers

Which register is used for indirect or indexed addressing of the other file registers?

<p>FSR register (B)</p> Signup and view all the answers

In which addressing mode does the operand hold the data to be executed?

<p>Register operand addressing mode (B)</p> Signup and view all the answers

Which addressing mode uses an address of Memory location as the operand?

<p>Memory operand addressing mode (D)</p> Signup and view all the answers

What does the MOVLW instruction mean in English?

<p>'Move Literal Value Into W' (A)</p> Signup and view all the answers

How many bits is the W register?

<p>8-bit (B)</p> Signup and view all the answers

Flashcards

Program memory capacity in PIC 16F877

Program memory in the PIC 16F877 chip has a capacity of 14.3 Kbytes.

Where is user code stored?

The Program memory section is where the code written (instructions) by the user is stored.

Default bank for accessing SFRs

BANK0 is the default bank for accessing special function registers (SFRs).

Size of each SFR bank

Each bank in the special function register file (SFR) has 32 bytes.

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Immediate Addressing Mode

Immediate Addressing Mode uses a constant or numeric value directly in the instruction.

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Data EEPROM's purpose

Data EEPROM in the PIC 16F877 stores non-volatile data, which means it retains data even when power is off.

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Memory Operand Addressing Mode

Memory Operand Addressing Mode uses a memory location as the operand. The address of the memory location is included in the instruction.

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Register Operand Addressing Mode

Register Operand Addressing Mode uses a register to hold the data used in the instruction. The register is the operand.

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Memory Operand Addressing Mode focus

Memory Operand Addressing Mode deals with the address of the memory location. It focuses on the memory location where the data is stored.

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Indirect Addressing Mode use

Indirect Addressing Mode is convenient for working with data arrays in general purpose registers because it uses an index to access different elements of the array.

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FSR (File Register) purpose

The FSR (File Register) contains the address of another register in the file. It is used in indirect or indexed addressing.

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INDF (Indirect File) Register purpose

The INDF (Indirect File) Register holds the address of the memory location pointed to by the FSR. It is used in indirect addressing.

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MOVLW instruction meaning

The MOVLW instruction means 'Move Literal Value into W'. It loads a literal value into the W register.

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STATUS register capacity

The STATUS register has a capacity of 8 bits.

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Data EEPROM capacity in PIC 16F877

The data EEPROM in the PIC 16F877 chip has a capacity of 256 bytes.

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What is Immediate Addressing Mode?

Immediate Addressing Mode uses a constant or numeric value directly within the instruction.

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How many bytes does each SFR bank have?

Each bank in the special function register file (SFR) contains 32 bytes.

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What is the program memory capacity in PIC 16F877?

The program memory in the PIC 16F877 chip has a capacity of 14.3 Kbytes.

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Where is the STATUS register accessible?

The STATUS register is available in all banks and can be accessed at any time, regardless of the selected bank.

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What is Register Operand Addressing Mode?

Register Operand Addressing Mode deals with registers directly, like the instruction 'CLR W' (Clear W Register).

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What is Immediate Addressing?

Immediate Addressing Mode involves transferring data directly after the opcode.

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How many bits is the FSR register?

The FSR (File Register) has a capacity of 8 bits.

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What is Indirect Addressing Mode used for?

Indirect Addressing Mode is used for manipulating data arrays stored in general purpose registers (GPRs).

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What is the capacity of the STATUS register?

The STATUS register has a capacity of 8 bits.

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What is the purpose of the FSR register?

The FSR (File Register) is used in indirect or indexed addressing of other file registers. It acts as a pointer to other registers.

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Explain Register Operand Addressing Mode

Register Operand Addressing Mode involves the operand (where the data is) being a register. The instruction uses the value held by the register.

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What is Memory Operand Addressing Mode?

Memory Operand Addressing Mode uses the address of a memory location as the operand. The instruction uses the address to work with the data stored there.

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What is the meaning of the MOVLW instruction?

The MOVLW instruction means 'Move Literal Value Into W'. It copies a literal value into the 'W' register.

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How many bits is the W register?

The W register has a capacity of 8 bits, meaning it can store values ranging from 0 to 255.

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Study Notes

PIC 16F877 Memory

  • The program memory capacity in the PIC 16F877 chip is 14KB.
  • The program memory is used to store the programs written by the user.

Special Function Register (SFR)

  • Each bank in the SFR contains 256 bytes.
  • The default bank for accessing the SFR is Bank 0.

Addressing Modes

  • Implied addressing mode uses a number or constant as an operand.
  • Immediate addressing mode involves transferring data directly after the opcode.
  • Register addressing mode involves transferring data from/to a register.
  • Indexed addressing mode deals with the address or memory location.
  • Indirect addressing mode is convenient for manipulating data arrays located in general purpose registers.

Registers

  • FSR (File Select Register) is used for indirect or indexed addressing of the other file registers.
  • The FSR register holds the address indicated by the FSR in indirect addressing.
  • The W register is used for storing data temporarily.
  • The W register is 8-bit wide.

Instructions

  • MOVLW instruction means "Move Literal to W" in English.

Status Register

  • The status register capacity is 8 bits.

Data EEPROM

  • The data EEPROM capacity in the PIC 16F877 chip is 256 bytes.

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Description

This quiz covers the memory organization of the PIC16F877A microcontroller, including the division of memory into program memory and data memory, as well as the components of the data memory such as the general purpose register file and special function register file (SFR). Test your understanding of computer architectures in relation to PIC microcontroller programming.

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