I´m developing an ABS Brakes system with th 80C552 microcontroller, and I have few problems.
First of all I don´t know if the external interupt is driven by current or by voltage.

Can you help me?

In the future, I will ask you more cuestions about my "little" problems.

Thank you very much.

P.D: I hope you can understand what I mean. As you can see, my english is not very good.