Question: Write a PIC16F877A assembler fixed delay subroutine called D500US using a single register called DR1 located in memory 20h. The micro-controller is clocked by a

Write a PIC16F877A assembler fixed delay subroutine called D500US using a single register called DR1 located in memory 20h. The micro-controller is clocked by a 4MHz crystal oscillator. Show all calculations.

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