Podcast
Questions and Answers
Which letters can be displayed using a 7 segment display?
Which letters can be displayed using a 7 segment display?
- M to R
- G to L
- A to F (correct)
- S to Z
What is the purpose of the decimal point or dp in a 7 segment display?
What is the purpose of the decimal point or dp in a 7 segment display?
- To indicate an error in the displayed number
- To indicate a negative number
- To indicate the separation of integer and fractional parts (correct)
- To indicate the start of a new number
How are the cathode terminals connected in a Common Cathode 7 segment display?
How are the cathode terminals connected in a Common Cathode 7 segment display?
- They are connected to each segment separately
- They are made common and tied to VCC
- They are made common and tied to GND (correct)
- They are left unconnected
In a Common Cathode 7 segment display, what type of signal is required for a segment to glow?
In a Common Cathode 7 segment display, what type of signal is required for a segment to glow?
What type of signal is required for a segment to glow in a Common Anode 7 segment display?
What type of signal is required for a segment to glow in a Common Anode 7 segment display?
How are the anode terminals connected in a Common Anode 7 segment display?
How are the anode terminals connected in a Common Anode 7 segment display?
Which section of the PIC 16F877 chip contains the programs written by the user?
Which section of the PIC 16F877 chip contains the programs written by the user?
What is the range of addresses for the special function register file (SFR) in a PIC 16F877 chip?
What is the range of addresses for the special function register file (SFR) in a PIC 16F877 chip?
Which bank is the default bank for accessing the special function register (SFR) byte in a PIC 16F877 chip?
Which bank is the default bank for accessing the special function register (SFR) byte in a PIC 16F877 chip?
In which addressing mode is the operand a number or constant, not an address?
In which addressing mode is the operand a number or constant, not an address?
What type of memory is used to store non-volatile data in a PIC 16F877 chip?
What type of memory is used to store non-volatile data in a PIC 16F877 chip?
In a PIC 16F877 chip, what is the size of each bank for SFR registers in Bank1?
In a PIC 16F877 chip, what is the size of each bank for SFR registers in Bank1?
In the immediate addressing mode of a pic microcontroller, where is the data located with respect to the opcode?
In the immediate addressing mode of a pic microcontroller, where is the data located with respect to the opcode?
Which addressing mode deals with registers like CLR W?
Which addressing mode deals with registers like CLR W?
Under memory operand addressing mode, what does 'CLRF 13h' represent?
Under memory operand addressing mode, what does 'CLRF 13h' represent?
How is direct addressing done?
How is direct addressing done?
What does indirect addressing derive from?
What does indirect addressing derive from?
What is the purpose of the FSR register in indirect addressing?
What is the purpose of the FSR register in indirect addressing?
What does the INDF register in fact hold in indirect addressing?
What does the INDF register in fact hold in indirect addressing?
What kind of information does the Status Register contain?
What kind of information does the Status Register contain?
What is the purpose of the W Register in PIC microcontrollers?
What is the purpose of the W Register in PIC microcontrollers?
'MOVLW' instruction in PIC microcontrollers is used for what purpose?
'MOVLW' instruction in PIC microcontrollers is used for what purpose?
Study Notes
7-Segment Display
- The letters that can be displayed using a 7-segment display are A, B, C, D, E, F, G, H, I, J, L, O, P, U, Y
- The decimal point (dp) in a 7-segment display is used to display fractions or decimal numbers
- In a Common Cathode 7-segment display, the cathode terminals are connected together and connected to ground or Vss
- A logic LOW signal is required for a segment to glow in a Common Cathode 7-segment display
- A logic HIGH signal is required for a segment to glow in a Common Anode 7-segment display
- In a Common Anode 7-segment display, the anode terminals are connected together and connected to Vcc
PIC 16F877 Chip
- The program counter (PC) section of the PIC 16F877 chip contains the programs written by the user
- The range of addresses for the special function register file (SFR) in a PIC 16F877 chip is 00h to 1Fh
- Bank 0 is the default bank for accessing the special function register (SFR) byte in a PIC 16F877 chip
- Immediate addressing mode is an addressing mode in a PIC microcontroller where the operand is a number or constant, not an address
- Flash memory is used to store non-volatile data in a PIC 16F877 chip
- Each bank for SFR registers in Bank1 of a PIC 16F877 chip is 80h bytes in size
Addressing Modes
- In immediate addressing mode, the data is located with the opcode
- The addressing mode that deals with registers is the Register Mode (e.g. CLR W)
- In memory operand addressing mode, 'CLRF 13h' represents clearing the file register at address 13h
- Direct addressing is done by specifying the address directly
- Indirect addressing is derived from the file select register (FSR)
- The FSR register in indirect addressing holds the address of the file register
- The INDF register in indirect addressing holds the value of the file register
- The Status Register contains information about the result of the last instruction executed (e.g. Zero, Carry, etc.)
- The W Register in PIC microcontrollers is used to hold temporary results
- The 'MOVLW' instruction in PIC microcontrollers is used to move a literal value to the W Register
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Description
Learn about interfacing seven segment display with PIC16F877A microcontroller in this lecture. Understand how seven segment displays work, their applications, and the arrangement of LED segments. Explore the use of a decimal point for displaying decimal digits and letters A to F.