PIC MICROCONTROLLER
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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RB3/PGM
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RB6/PGC
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RB7/PGD
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RB0/INT
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Detailed explanation-1: -In our case in PIC16F877A the 33rd pin RBO/INT is used for external interrupt.
Detailed explanation-2: -External Interrupt Pins They are on PORTB pins RB0, RB1, and RB2 shown in the below image. These interrupts are edge-triggered interrupts i.e. triggered by either a rising edge or by a falling edge.
Detailed explanation-3: -13 in Port 3 are for the external hardware interrupts INT0 and INT1, respectively. Memory locations are 0003H and 0013H respectively in the interrupt vector table.
Detailed explanation-4: -We can enable/disable external interrupts by the GICR register. To define a level trigger or edge trigger on external INT0 and INT1 pins MCUCR register is used. These bits define the level or edge that triggers the INT0 pin.