PIC 16FA is a microcontroller manufactured by Microchip Inc. You can see its specifications and download the datasheet here. PIC16F87XA 28/40/Pin Enhanced Flash Microcontrollers Devices Included in this Data Sheet: • PIC16FA • PIC16FA • PIC16FA • PIC16FA. Learn about PIC16FA PIC series microcontroller with its a detailed overview of PIC16FA features with its PDF datasheet to download.

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The green arrow shows the current execution that has been decoded and ready for execution. This is also shown in the image. Once the processor is reset and ready dtasheet go, the program counter, which is simply a counter that acts as a pointer to the program instructions points to the initial location of the program memory. Low-voltage single-supply ICSP programming enable pin.

The binary view can be availed by datasneet within the watch window and selecting the corresponding option. The programs written in the assembly language is further to be converted into binary encoded format so as to use it in the microcontroller.

PIC microcontrollers – embeddedinn

When one instruction is being executed, the next instruction is fetched and decoded, making it ready for execution. To set a breakpoint, double click in the grey area near the line we need to breakpoint.

It is available for download, free of cost from here. Before jumping into the implementation, a couple of settings are to be made so that we can observe the animation sequence. In case any of the components are not correctly pointed correctly, a red cross mark appears near the component. Writing a 1 into the corresponding TRIS bit configure the port pin as an input pin, and the data comming in throught the port pin will be latched into the corresponding PORT bit in the immediatly next execution cycle.


This will be one of the 35 instructions that the PIC can handle in our case. Master Clear input or programming voltage output. We will start with some examples and later go into building intelligent machines.

There are 6 ports for PIC 16fa. Timer1 external clock input. The Program memory window gives us an idea as to where our program is residing in the program memory. As it can be seen from the pin diagram, the port pins are bi-directional and and most of them are multiplexed in function. Once this is done, the value remains in the location until either it is changed by another instruction or the micro controller is reset or powered off.

Using a simulator, we can simulate the loading of a program, execute it step by step, analyze the effect of each instructions in different registers of the controller and thereby debug and fine-tune the firmware.

The single cycle instructions execute at this speed.

The decrement operation takes one execution cycle per operation. The simulator logic analyzer tool is a very handy tool that gives datashfet feel of the familiar oscilloscope interface. This point is the reset vector and contains the first instruction of the steps that are to be done once the controller is reset.


Go through the datazheet of each and every instruction. If operations are carried out one after another, the entire task to complete two sets of laundry takes 2 hours. The device library p16fa. A microcontroller is a synchronous digital device.

PIC16FA: Introduction, Pin Diagram, Pin Description, Features & Datasheet

Thusat the next execution cycle, the instruction fetched is the movlw at It will be a binary number that has encoded information relevant to the instruction. But corresponding lines will have to be added at the reset vector 0x00 for successful execution. When the execution unit receive jump or loop instructions, it stores the current program counter value to the stack and loads the new program location to go to into the PC.

Data cannot directly be written into or transferred from one RAM register to another using any of the 35 available instructions. To keep things simple, there will be no user input, rather the literals to be added will be stored within the micro-controller and so will be the result. Leave a Comment Your email address will not be published.


Execution of a command can xatasheet a wide variety of tasks like moving some data from one RAM location to another, or storing it in a non-volatile EEPROM location, or communicating with an external device like a PC. Not a physical register.

This pin is an active low Reset to the device.