PIC16FA Flash pin 4MHz 8kB Microcontroller Datasheet and Technical Data. Note: The datasheet of PIC16FA Microcontroller and more detailed Features can be found at the bottom of this page. PIC16F87XA 28/40/Pin Enhanced Flash Microcontrollers Devices Included in this Data Sheet: • PIC16FA • PIC16FA • PIC16FA • PIC16FA.

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The execution unit fetches the program instruction in this first location. This is where we will be entering our code.

Once this is done, we have to add the file dataheet the project. Delay routines are generated usually using timers inside the controller. The programs written using these basic instructions are called assembly language programs and is the most primitive not exactly, but close [: This is dome by the assembler software. It resides outside the RAM register block.

Since it gives a clear cut idea as to what is happening inside the device datasheett i. This 14 bit encoded binary contains the instruction, the scratch pad memory location to be datasheeet and the literal value 0xff. The task of the execution unit, in simple words, is to fetch the instructions pointed to by the program counter PCunderstand it Decode and execute it.

We can use this pause to make required readings and continue with the simulation.


These tasks vary from micro controller to micro controller. The 16f877 used in this article has been phased out by Microchip. For example, if multiplication of two numbers is to be performed in PIC 16Fathere is no direct instruction to do it. To activate the colour datasbeet that will highlight keywords, type in something and save the file with the.


The second form is easier to understand and manipulate from a programmers point of view.

PIC16FA-I/P Technical Data

This gives rise to the a major classifications in processor architecture as. Before the transfer the appropriate bank is also to be selected. The Run button executes the command eliminating the visual effects we get from the animation. So here we are considering a simple microcontroller — the PIC 16Fa as an example to begin with. As it can be seen from datashest pin diagram, the port pins are bi-directional and and most of them are multiplexed in function.

This is done by switching on the corresponding port pin. Shown above is a simplified processor architecture. A microcontroller is a synchronous digital device. At 07another call instruction is encountered. Writing a 1 16f87a 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.

PIC microcontrollers

To learn about controllers, processors and architectures in a general and abstract manner is tedious, time consuming and at-times dry. D] and optimized form of programming. It will be a binary number that has encoded information relevant to the instruction. Download it and keep it for further reference throughout the tutorial. The key architectural concepts of the PIC 16fa microcontroller has been discussed.


For example, the instruction movlw 0xff will be encoded as 11 when stored in the PIC 16fa program memory. A micro-controller, in simple words, is a miniature computer with a central processing unit and some peripherals integrated into a single integrated circuit package. This instructions define the architecture of the controllers central processor in a macro scale.

The decrement operation takes one execution cycle 166f877a operation.

In those cases, we have to develop routines for stacking. So, now the PC points to When we where dealing with the delay routine, you would have noticed that the execution time of the instructions in the animation mode is equal to the animate step time we have set in the debugger options and not the actual time the microcontroller takes in the field.

PIC16FA – Microcontrollers and Processors – Microcontrollers and Processors

In case any of the components are not correctly pointed correctly, a red cross mark appears near the component. We will be using this software to simulate instruction flow within the PIC microcontroller and there by understand its architecture. Leave a Comment Your email address will not be published. Also, the time period of the square wave is not what the original hardware would produce.