Chapter 16 edge port module (eport), 1 introduction, Chapter 16 – Freescale Semiconductor ColdFire MCF52210 User Manual
Page 269: Edge port module (eport), 1 introduction -1
MCF52211 ColdFire® Integrated Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor
16-1
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.
NOTE
Not all EPORT signals may be output from the device. See
to determine which signals are available.
Figure 16-1. EPORT Block Diagram
NOTE
The GPIO module must be configured to enable the peripheral function of
the appropriate pins (refer to
Chapter 13, “General Purpose I/O Module”
)
prior to configuring the edge-port module.
Inter
nal Bus
Synchronizer
EPDRn
EPFRn
EPPAR[2n, 2n + 1]
EPIERn
Edge Detect
D0
Stop
Logic
EPPDRn
D1
Q
D0
D1
Q
Mode
EPDDRn
To Interrupt
Controller
IRQn pin
Rising Edge
of System Clock