User`s manual

User’s Manual External Interrupts E–1

External Interrupts E

Appendix E provides information about using the RabbitCore RCM2100

external interrupts.

The Rabbit 2000 microprocessor has four external

interrupt inputs on Parallel Port E, which is accessed

through pins PE0–PE7 on header J2.

Table E –1 lists the general-purpose Parallel Port E

I/O pins that can be used for external interrupts. As

shown in Table E–1, the default use for PE0 and

PE1 is with high-power outputs HV0 and HV1.

This leaves PE4 and PE5 available for use as exter-

nal interrupt inputs.

Figure E–1 illustrates these pins.

Table E –1: Rabbit 2000 Parallel Port E Interrupts

Pin Default Use Alternate Use

PE0

General-

Purpose

I/O

INT0A input

PE1 INT1A input

PE4 INT0B input

PE5 INT1B input

Figure E–1: Rabbit 2000 Interrupt Pins

PE0

PE1

PE4

PE5

I/O or INT0B

I/O or INT1B

I/O or INT0A

I/O or INT1A