Pin Functions In Each Mode - Hitachi F-ZTAT H8/3039 Series Hardware Manual

P1DR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.

7.2.3 Pin Functions in Each Mode

The pin functions of port 1 differ between mode 1, 3 (expanded mode with on-chip ROM
disabled) , mode 5 (expanded mode with on-chip ROM enabled) , mode 6, and 7 (single-chip
mode). The pin functions in each mode are described as follows.
Modes 1 and 3: Address output can be selected for each pin in port 1. Figure 7-2 shows the pin
functions in modes 1 and 3.
Modes 5: Address output or generic input can be selected for each pin in port 1. A pin becomes an
address output pin if the corresponding P1DDR bit is set to 1, and a generic input pin if this bit is
cleared to 0. Following a reset, all pins are input pins. To use a pin for address output, its P1DDR
bit must be set to 1. Figure 7-3 shows the pin functions in mode 5.
Port 1
Figure 7-2 Pin Functions in Modes 1 and 3 (Port 1)
A (output)
7
A (output)
6
A (output)
5
A (output)
4
A (output)
3
A (output)
2
A (output)
1
A (output)
0
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