Motorola ColdFire MCF5281 - Manual (Page 209)

Freescale Semiconductor 11-1
Chapter 11
Edge Port Module (EPORT)
11.1 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. See
Figure 11-1 .
Figure 11-1. EPORT Block Diagram
11.2 Low-Power Mode Operation
This section describes the operation of the EPORT module in low-power modes. For more information on
low-power modes, see
Chapter 7, “Power Management .” Table 11-1 shows EPORT module operation in
low-power modes, and describes how this module may exit from each mode.
NOTE
The low-power interrupt control register (LPICR) in the System Control
Module specifies the interrupt level at or above which is needed to bring the
device out of a low-power mode.
IPB
U
S
Synchronizer
EPDR[n]
EPFR[n]
EPPAR[2n, 2n + 1]
EPIER[n]
Edge Detect
D0
Stop
Logic
EPPDR[n]
D1
Q D0
D1
Q
Mode
EPDDR[n]
To Interrupt
Controller
IRQx PIN
Rising Edge
of System Clock
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3