Motorola PowerQUICC II MPC8280 Series Reference Manual page 1400

Port Block Diagram
41.3 Port Block Diagram
Figure 41-6 shows the functional block diagram.
To/from internal bus
From DED OUT1
From DED OUT2
To DED IN1
PPAR & PSOR & PDIR
To DED IN2
PPAR & PSOR & PDIR
Register Name
PPARx
PSORx
PDIRx
PODRx
PDATx
1
Bidirectional signals must be programmed as inputs (PDIR = 0).
41.4 Port Pins Functions
Each pin can operate as a general purpose I/O pin or as a dedicated input or output pin.
41-6
Freescale Semiconductor, Inc.
PDATx Write
PDATx
Latch
0
1
PSOR
Default
0
Input IN1
1
Default
0
Input IN2
1
0
General purpose
Dedicated 1
Input
Regular
0
Figure 41-6. Port Functional Operation
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Read
PDATx Read
0
1
PDIR
PPAR
1
Dedicated Port pin assignment
Dedicated 2
Output
Open drain
1
Open
Drain
Control
EN
Pin
PODR
Description
Special operation
1
Direction
Data
MOTOROLA