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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.
EPPAR[2n, 2n + 1]
EPFR[n]
EPPDR[n]
Synchronizer
EPIER[n]
EPDR[n]
EPDDR[n]
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.
MOTOROLA
Edge Detect
Logic
Rising Edge
of System Clock
Figure 11-1. EPORT Block Diagram
Chapter 11. Edge Port Module (EPORT)
Stop
Mode
D0
Q
D0
D1
Q
D1
IRQx PIN
To Interrupt
Controller
11-1
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