To develop a program for the PIC 16F84A using the MPLAB v8.86 IDE simulator software. The program is to function as a 10 second countdown timer which, when started, will display the number 9 on a seven segment display. The number will then be automatically decremented, displayed, decremented etc. until zero is reached. Each number is displayed for 1 second. The countdown sequence will then repeat. Objectives:

-Write the assembly code to be input into MPLAB v8.86

Describe your program using properly structured flowcharts (main program and subroutines) .

Demonstrate the use of subroutines e.g To initialize the peripheral registers and to set the time delays, etc .

Demonstrate the use of indexed addressing to retrieve data from a table in memory.

Describe the operation of the program in writing .

Provide a properly formatted program listing