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MPC8280 Datasheet(PDF) 1322 Page - Freescale Semiconductor, Inc |
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MPC8280 Datasheet(HTML) 1322 Page - Freescale Semiconductor, Inc |
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1322 / 1386 page  Parallel I/O Ports MPC8280 PowerQUICC II Family Reference Manual, Rev. 1 41-6 Freescale Semiconductor 41.3 Port Block Diagram Figure 41-6 shows the functional block diagram. Figure 41-6. Port Functional Operation 41.4 Port Pins Functions Each pin can operate as a general purpose I/O pin or as a dedicated input or output pin. Pin PDAT x Default Input IN1 Default Input IN2 To DED IN1 To DED IN2 From DED OUT2 PDAT x 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 PDAT x Write To/from internal bus Register Name 0 1 Description PPAR x General purpose Dedicated Port pin assignment PSOR x Dedicated 1 Dedicated 2 Special operation PDIR x Input Output Direction1 1 Bidirectional signals must be programmed as inputs (PDIR = 0). PODR x Regular Open drain PDAT x 01 Data Read PDIR PPAR |
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