Datasheet

Section 9 I/O Ports
Rev.6.00 Sep. 27, 2007 Page 379 of 1268
REJ09B0220-0600
9.5 Port 4
9.5.1 Overview
Port 4 is an 8-bit input-only port. Port 4 pins also function as A/D converter analog input pins
(AN
0
to AN
7
) and D/A converter analog output pins (DA
0
and DA
1
). Port 4 pin functions are the
same in all operating modes. Figure 9.4 shows the port 4 pin configuration.
P4
7
(input) / AN
7
(input) / DA
1
(output)
P4
6
(input) / AN
6
(input) / DA
0
(output)
P4
5
(input) / AN
5
(input)
P4
4
(input) / AN
4
(input)
P4
3
(input) / AN
3
(input)
P4
2
(input) / AN
2
(input)
P4
1
(input) / AN
1
(input)
P4
0
(input) / AN
0
(input)
Port 4 pins
Port 4
Figure 9.4 Port 4 Pin Functions