Port B; Overview - Renesas H8S Series Hardware Manual
16-bit single-chip microcomputer
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- Hardware manual (1038 pages) ,
- User manual (38 pages) ,
- Hardware manual (875 pages)
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9.9
Port B
9.9.1
Overview
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.
Port B has a on-chip MOS input pull-up function that can be controlled by software (on-chip ROM version only).
Figure 9-11 shows the port B pin configuration.
Pin functions in mode 6*
PB
PB
PB
PB
PB
PB
PB
PB
Note: * Modes 6 and 7 are provided in the on-chip ROM version only.
Port B pins
PB
/A
7
15
PB
/A
6
14
PB
/A
5
13
PB
/A
4
12
Port B
PB
/A
3
11
PB
/A
2
10
PB
/A
1
9
PB
/A
0
8
(input)/
A
(output)
7
15
(input)/
A
(output)
6
14
(input)/
A
(output)
5
13
(input)/
A
(output)
4
12
(input)/
A
(output)
3
11
(input)/
A
(output)
2
10
(input)/
A
(output)
1
9
(input)/
A
(output)
0
8
Figure 9-11 Port B Pin Functions
Pin functions in mode 7*
PB
(I/O)
7
PB
(I/O)
6
PB
(I/O)
5
PB
(I/O)
4
PB
(I/O)
3
PB
(I/O)
2
PB
(I/O)
1
PB
(I/O)
0
Pin functions in modes 4 and 5
A
(output)
15
A
(output)
14
A
(output)
13
A
(output)
12
A
(output)
11
A
(output)
10
A
(output)
9
A
(output)
8
Rev.6.00 Oct.28.2004 page 307 of 1016
REJ09B0138-0600H
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