7.4.3
Pin Functions in Each Mode
Port 3 has different pin functions in different modes. A separate description for each mode is given
below.
Pin Functions in Modes 1 and 2: In mode 1 (expanded mode with on-chip ROM disabled) and
mode 2 (expanded mode with on-chip ROM enabled), port 3 is automatically used for the
input/output pins of the 8-bit data bus (D7 to D0). Figure 7.10 shows the pin functions in modes 1
and 2.
Modes 1 and 2
D7 (input/output)
D6 (input/output)
D5 (input/output)
D4 (input/output)
Port 3
D3 (input/output)
D2 (input/output)
D1 (input/output)
D0 (input/output)
Figure 7.10 Pin Functions in Modes 1 and 2 (Port 3)
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RENESAS [ RENESAS TECHNOLOGY CORP ]
