Motorola MPC8260 User Manual
35-6
MPC8260 PowerQUICC II UserÕs Manual
MOTOROLA
Part IV. Communications Processor Module
35.3 Port Block Diagram
Figure 35-6 shows the functional block diagram.
Figure 35-6. Port Functional Operation
35.4 Port Pins Functions
Each pin can operate as a general purpose I/O pin or as a dedicated input or output pin.
Pin
PDATx
Default
Input IN1
Default
Input IN2
To DED IN1
To DED IN2
From DED OUT2
PDATx Read
0
1
0
1
PPAR & PSOR & PDIR
PPAR & PSOR & PDIR
Open
Drain
Control
EN
PODR
0
Latch
From DED OUT1
PSOR
1
0
1
PDATx Write
To/from internal bus
Register Name
0
1
Description
PPARx
General purpose
Dedicated
Port pin assignment
PSORx
Dedicated 1
Dedicated 2
Special operation
PDIRx
Input
Output
Direction
1
1
Bidirectional signals must be programmed as inputs (PDIR = 0).
PODRx
Regular
Open drain
PDATx
0
1
Data
Read
To/from peripheral bus
PDIR
PPAR