HD6412350 Hitachi, HD6412350 Datasheet - Page 383

• Manufacturer Part Number: HD6412350
• Description: (HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
• Manufacturer: Hitachi

9.9
9.9.1
Port B is an 8-bit I/O port. Port B has an address bus output function, and the pin functions change
according to the operating mode. However, in the H8S/2350, port B pins function only as address
outputs.
Port B has a built-in MOS input pull-up function that can be controlled by software (H8S/2351
only).
Figure 9-11 shows the port B pin configuration.
Port B
Overview
Pin functions in modes 2 and 6*
PB
PB
PB
PB
PB
PB
PB
PB
Note: * Modes 2, 3, 6, and 7 only apply to the H8S/2351.
Port B
7
6
5
4
3
2
1
0
(input)/
(input)/
(input)/
(input)/
(input)/
(input)/
(input)/
(input)/
A
A
A
A
A
A
A
A
15
14
13
12
11
10
9
8
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
Port B pins
PB
PB
PB
PB
PB
PB
PB
PB
7
6
5
4
3
2
1
0
Figure 9-11 Port B Pin Functions
/ A
/ A
/ A
/ A
/ A
/ A
/ A
/ A
15
14
13
12
11
10
9
8
Pin functions in modes 1, 4, and 5
A
A
A
A
A
A
A
A
Pin functions in modes 3 and 7*
PB
PB
PB
PB
PB
PB
PB
PB
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
363