Introduction - Freescale Semiconductor MCF52277 Reference Manual

Chapter 16
Edge Port Module (EPORT)
16.1

Introduction

The edge port module (EPORT) has seven external interrupt pins, IRQ7–IRQ1. Each pin can be configured
individually as a level-sensitive interrupt pin, an edge-detecting interrupt pin (rising edge, falling edge, or
both), or a general-purpose input/output (I/O) pin.
Not all EPORT signals may be output from the device. See
"Signal Descriptions,"
EPPAR[2n, 2n + 1]
EPPDRn
Synchronizer
EPDDRn
The GPIO module must be configured to enable the peripheral function of
the appropriate pins (refer to
prior to configuring the edge-port module.
Freescale Semiconductor
to determine which signals are available.
Edge Detect
Logic
EPFRn
Rising Edge
of System Clock
EPIERn
EPDRn
Figure 16-1. EPORT Block Diagram
Chapter 14, "General Purpose I/O
MCF52277 Reference Manual, Rev. 1
NOTE
Stop
Mode
D0
Q
D0
D1
D1
IRQn pin
NOTE
Chapter 2,
Q
To Interrupt
Controller
Module")
16-1