Hitachi H8S/2678 Series Reference Manual page 284

In mode 7, when a PDDDR bit is cleared to 0 (input port setting), setting the corresponding
PDPCR bit to 1 turns on the MOS input pull-up for the corresponding pin.
PDPCR is initialized to H'00 by a reset and in hardware standby mode. It retains its prior state in
software standby mode.
5.13.3 Pin Functions
Port D pins also function as data input/output pins. Port D pin functions are shown in table 5.27.
Table 5.27 Port D Pin Functions
Pin Selection Method and Pin Functions
PD7/D15 The pin function is switched as shown below according to the operating mode, bit
EXPE, and bit PDDDR.
PD6/D14
Operating
PD5/D13
mode
PD4/D12
EXPE
PD3/D11
PDDDR
PD2/D10
Pin function
PD1/D9
PD0/D8
1, 2, 4, 5, 6
—
—
Data I/O pin PD input pin
7
0
0 1
PD output pin
1
—
Data I/O pin
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