7.3.3
Pin Functions in Each Mode
Port 2 has different pin functions in different modes. A separate description for each mode is given
below.
Pin Functions in Mode 1: In mode 1 (expanded mode with on-chip ROM disabled), port 2 is
automatically used for upper address output (A15 to A8). Figure 7.6 shows the pin functions in
mode 1.
A15 (output)
A
A
14 (output)
13 (output)
A12 (output)
Port 2
A
A
11 (output)
10 (output)
A9 (output)
A8 (output)
Figure 7.6 Pin Functions in Mode 1 (Port 2)
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