PIC Microcontroller

[anboli]

hi to all,

 i need to interface 6 external interrupts with controller. i dont know which PIC microcontroller has 6 external interrupt.

anybody know means suggest me the IC name.. it will be helpful for me.

thanks in advance..

 

[AJISH ALFRED]

Hi,

Instead of searching for the microcontroller with 6 external interrupts use this common method.

Connect the 6 interrupt lines to the 6 input pins.

OR the interrupt lines and connect the output of the OR gate to the single external interrupt pin.

Whenever any of the interrupt lines become high the OR gate will produce an output which interrupts the microcontroller through the single external interrupt.

Now inside the ISR you can check which line has become high by  simply reading the input pins one by one.

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