Datasheet

Rev.6.00 Oct.28.2004 page 310 of 1016
REJ09B0138-0600H
9.9.3 Pin Functions
Mode 7 (On-Chip ROM Version Only): In mode 7, port B pins function as I/O ports. Input or output can be specified
for each pin on an individual bit basis. Setting a PBDDR bit to 1 makes the corresponding port B pin an output port, while
clearing the bit to 0 makes the pin an input port.
Port B pin functions in mode 7 are shown in figure 9-12.
PB
7
PB
6
PB
5
PB
4
PB
3
PB
2
PB
1
PB
0
Port B
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
Figure 9-12 Port B Pin Functions (Mode 7)
Mode 6 (On-Chip ROM Version Only): In mode 6, port B pins function as address outputs or input ports. Input or
output can be specified on an individual bit basis. Setting a PBDDR bit to 1 makes the corresponding port B pin an
address output, while clearing the bit to 0 makes the pin an input port.
Port B pin functions in mode 6 are shown in figure 9-13.
A
15
A
14
A
13
A
12
A
11
A
10
A
9
A
8
PB
7
PB
6
PB
5
PB
4
PB
3
PB
2
PB
1
PB
0
(input)
(input)
(input)
(input)
(input)
(input)
(input)
(input)
When PBDDR = 1 When PBDDR = 0
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
Port B
Figure 9-13 Port B Pin Functions (Mode 6)