Hitachi H8S/2678 Series Reference Manual page 271

5.11 Port B
5.11.1 Overview
Port B is an 8-bit I/O port. Port B pins also function as address bus outputs. The pin functions
change according to the operating mode.
Port B has a built-in MOS input pull-up function that can be controlled by software.
Figure 5.10 shows the port B pin configuration.
Port B
254
Port B pins
PB7 / A15
PB6 / A14
PB5 / A13
PB4 / A12
PB3 / A11
PB2 / A10
PB1 / A9
PB0 / A8
Pin functions in mode 4
PB7 (input) / A15 (output)
PB6 (input) / A14 (output)
PB5 (input) / A13 (output)
PB4 (input) / A12 (output)
PB3 (input) / A11 (output)
PB2 (input) / A10 (output)
PB1 (input) / A9 (output)
PB0 (input) / A8 (output)
Figure 5.10 Port B Pin Functions
Pin functions in modes 1, 2, 5, and 6
A15 (output)
A14 (output)
A13 (output)
A12 (output)
A11 (output)
A10 (output)
A9 (output)
A8 (output)
Pin functions in mode 7
PB7 (I/O) / A15 (output)
PB6 (I/O) / A14 (output)
PB5 (I/O) / A13 (output)
PB4 (I/O) / A12 (output)
PB3 (I/O) / A11 (output)
PB2 (I/O) / A10 (output)
PB1 (I/O) / A9 (output)
PB0 (I/O) / A8 (output)