HD6432621 Hitachi, HD6432621 Datasheet - Page 284

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

9.6
9.6.1
Port B is an 8-bit I/O port. Port B pins also function as TPU I/O pins (TIOCA3, TIOCB3,
TIOCC3, TIOCD3, TIOCA4, TIOCB4, TIOCA5, TIOCB5) and as address 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 9-5 shows the port B pin configuration.
240
Port B
Overview
Port B
Port B pins
PB7 /A15/TIOCB5
PB6 /A14/TIOCA5
PB5 /A13/TIOCB4
PB4 /A12/TIOCA4
PB3 /A11/TIOCD3
PB2 /A10/TIOCC3
PB1 /A9 /TIODB3
PB0 /A8 /TIOCA3
Figure 9-5 Port B Pin Functions
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
Pin functions in modes 4 to 6
Pin functions in mode 7
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
(I/O) /
(I/O) /
(I/O) /
(I/O) /
(I/O) /
(I/O) /
(I/O) /
(I/O) /
(I/O) / TIOCB5 (I/O)
(I/O) / TIOCA5 (I/O)
(I/O) / TIOCB4 (I/O)
(I/O) / TIOCA4 (I/O)
(I/O) / TIOCD3 (I/O)
(I/O) / TIOCC3 (I/O)
(I/O) / TIOCB3 (I/O)
(I/O) / TIOCA3 (I/O)
A15
A14
A13
A12
A11
A10
A9
A8
(output) / TIOCB5 (I/O)
(output) / TIOCA5 (I/O)
(output) / TIOCB4 (I/O)
(output) / TIOCA4 (I/O)
(output) / TIOCD3 (I/O)
(output) / TIOCC3 (I/O)
(output) / TIOCB3 (I/O)
(output) / TIOCA3 (I/O)