Datasheet

Section 9 I/O Ports
Rev.6.00 Sep. 27, 2007 Page 408 of 1268
REJ09B0220-0600
Mode 6: 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 9.10.
A
15
(output)
A
14
(output)
A
13
(output)
A
12
(output)
A
11
(output)
A
10
(output)
A
9
(output)
A
8 (output)
PB
7
(input)
PB
6
(input)
PB
5
(input)
PB
4
(input)
PB
3
(input)
PB
2
(input)
PB
1
(input)
PB
0
(input)
When PBDDR = 1 When PBDDR = 0
Port B
Figure 9.10 Port B Pin Functions (Mode 6)
Mode 7: 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 9.11.
A
15
(output)
A
14
(output)
A
13
(output)
A
12
(output)
A
11
(output)
A
10
(output)
A
9
(output)
A
8 (output)
PB
7
(input)
PB
6
(input)
PB
5
(input)
PB
4
(input)
PB
3
(input)
PB
2
(input)
PB
1
(input)
PB
0
(input)
When PBDDR = 1 When PBDDR = 0
Port B
Figure 9.11 Port B Pin Functions (Mode 7)