What is FSR and Indf?
File register 00 (INDF) is used for indirect file register addressing. The address of the register required is placed in the file select register (FSR). When data is written to or read from INDF, it is actually written to or read from the file register pointed to by FSR.
What is the function of FSR and Indf?
FSR Register It is used for indirect or indexed addressing of the other file registers, particularly the GPRs (General Purpose Registers 0Ch-4Fh). If a file register address (00–4F) is loaded into FSR, the contents of that file register can be read or written through file register 00, the Indirect File Register (INDF).
What is the function of FSR?
FSRs are sensors that allow you to detect physical pressure, squeezing and weight. They are simple to use and low cost. This is a photo of an FSR, specifically the Interlink 402 model.
What is the role of Indf in indirect addressing mode?
Indirect addressing: Addressed location is accessed through INDF register. And INDF register in fact holds the address indicated by the FSR. Indirect addressing is very convenient for manipulating data arrays located in GPR registers.
What is SFR in PIC?
Special Function Registers (SFR) These registers perform various dedicated functions inside the PIC chip. Each special function inside this PIC chip is controlled by using these registers. These registers are used by the CPU and peripheral modules for controlling the desired operation of the device.
What is tris register in PIC?
The TRIS A register controls the direction of the PORT pins even when they are being used as analog inputs. The user must ensure the bits in the TRISA register are maintained set when using them as analog inputs.
What are the features of PIC microcontroller?
PIC devices generally feature:
- Flash memory (program memory, programmed using MPLAB devices)
- SRAM (data memory)
- EEPROM memory (programmable at run-time)
- Sleep mode (power savings)
- Watchdog timer.
- Various crystal or RC oscillator configurations, or an external clock.
What is file register in pic?
A register is a place inside the PIC that can be written to, read from or both. Think of a register as a piece of paper where you can look at and write information on. The figure below shows the register file map inside the PIC16F84.
How do you read a FSR?
Reading an FSR The easiest way to read the FSR is to connect the FSR with a fixed value resistor (usually 10kΩ) to create a voltage divider. To do this you connect one end of the FSR to Power and the other to a pull-down resistor.
What is SFR in pic?
What is tris register in pic?
What are bits of PSW?
The program status word (PSW) register is an 8-bit register, also known as flag register. It is of 8-bit wide but only 6-bit of it is used….8051 Flag Bits and PSW Register.
| CY | PSW.7 | Carry Flag |
|---|---|---|
| RS0 | PSW.3 | Register Bank selector bit 0 |
| OV | PSW.2 | Overflow Flag |
| – | PSW.1 | User definable FLAG |
When to use INDF and FSR in GPRS?
It is used for indirect or indexed addressing of the other file registers, particularly the GPRs (General Purpose Registers 0Ch-4Fh). If a file register address (00–4F) is loaded into FSR, the contents of that file register can be read or written through file register 00, the Indirect File Register (INDF).
Which is the indirect file register in FSR?
If a file register address (00–4F) is loaded into FSR, the contents of that file register can be read or written through file register 00, the Indirect File Register (INDF). This method can be used for accessing a set of data RAM locations, by reading or writing the data via INDF, and selecting the next file register by incrementing FSR.
Is the INDF register a physical or indirect register?
The INDF register is not a physical register. Addressing INDF actually addresses the register whose address is contained in the FSR register (FSR is a pointer). This is indirect addressing. A read of the INDF register will return the value of 10h
How to load a variable address into FSR?
The File Select Register (FSR) (register 4) points to other File Registers and allows them to be accessed by reading or writing the IND register (register 0). Use the following to load a variable address into FSR: movlw variable_name movwf FSR Using < movlw > is the key.