Question: In Figure, if Vx > Vw , turn an LED ON connected at bit 3 of Port C. If Vy > Vz, turn the LED OFF. Assume that Vx > Vw and Vy > Vz will not occur at the same time. Using ports, registers, and memory locations as needed and INT0 interrupt:
(a) Draw a neat block diagram showing the PIC18F4321 microcontroller and the connections to ports in the diagram in Figure P8.14.
(b) Write the main program at 0x150 and the service routine at 0x200 in PIC18F assembly language. The main program will initialize STKPTR to 0x20, initialize the ports and wait for an interrupt. The service routine will accomplish the task and stop.
