Motorola MPC860 PowerQUICC User Manual page 889

Read Path To
PADAT[15]
Write Path From
PADAT[15]
Output
RXD1
To SCC1
Figure 34-5. Block Diagram for PA15 (True for all Non-Open-Drain Port Signals)
Using PA14 as an example, Figure 34-6 shows the functional block diagram for all port A
signals with open-drain capability.
Read Path To
PADAT[14]
Write Path From
PADAT[14]
Output
Latch
TXD1
From SCC1
MUX
Figure 34-6. Block Diagram for PA14 (True for all Open-Drain Port Signals)
MOTOROLA
EN
Latch
16-Bits
PADIR
0
MUX
1
EN
0
EN
1
16-Bits
PADIR
0
1
EN
Chapter 34. Parallel I/O Ports
Part V. The Communications Processor Module
0 0
MUX
1 1
EN
EN
16-Bits
PAPAR
0
MUX MUX
1
EN EN
EN
16-Bits
PAPAR
MUX
EN
RXD1/PA15
Pin
EN
RXD1/PA14
Open
Drain Pin
Control
16-Bits
PAODR
34-7