MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 289

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
EPPA[7:0] — EPORT Pin Assignment Select Fields
The read/write EPPAx fields configure EPORT pins for level detection
and rising and/or falling edge detection as
Pins configured as level-sensitive are inverted so that a logic 0 on the
external pin represents a valid interrupt request. Level-sensitive
interrupt inputs are not latched. To guarantee that a level-sensitive
interrupt request is acknowledged, the interrupt source must keep the
signal asserted until acknowledged by software. Level sensitivity
must be selected to bring the device out of stop mode with an INTx
interrupt.
Pins configured as edge-triggered are latched and need not remain
asserted for interrupt generation. A pin configured for edge detection
is monitored regardless of its configuration as input or output.
Interrupt requests generated in the EPORT module can be masked
by the interrupt controller module. EPPAR functionality is
independent of the selected pin direction.
Reset clears the EPPAx fields.
Freescale Semiconductor, Inc.
For More Information On This Product,
EPPAx
00
01
10
11
Edge Port Module (EPORT)
Go to: www.freescale.com
Pin INTx level-sensitive
Pin INTx rising edge triggered
Pin INTx falling edge triggered
Pin INTx both falling edge and rising edge triggered
Table 13-2. EPPAx Field Settings
Pin Configuration
Table 13-2
Edge Port Module (EPORT)
Memory Map and Registers
Advance Information
shows.
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