Datasheet

Section 9 I/O Ports
Rev.6.00 Sep. 27, 2007 Page 381 of 1268
REJ09B0220-0600
9.6 Port 5
9.6.1 Overview
Port 5 is a 4-bit I/O port. Port 5 pins also function as SCI I/O pins (TxD
2
, RxD
2
, and SCK
2
), the
A/D converter input pin (ADTRG), interrupt input pins (IRQ
4
to IRQ
7
), and bus control signal I/O
pins (WAIT and BREQO). The pin functions can be switched by means of settings in PFCR2 and
SYSCR. IRQ
4
to IRQ
7
only are Schmitt-triggered inputs. Figure 9.5 shows the port 5 pin
configuration.
P5
3
(I/O) / ADTRG (input) / IRQ
7
(input) / WAIT (input) / BREQO (output)
P5
2
(I/O) / SCK
2
(I/O) / IRQ
6
(input)
P5
1
(I/O) / RxD
2
(input) / IRQ
5
(input)
P5
0
(I/O) / TxD
2
(output) /IRQ
4
(input)
Port 5 pins
Pin functions in mode 7
P5
3
(I/O) / ADTRG (input) / IRQ
7
(input)
P5
2
(I/O) / SCK
2
(I/O) / IRQ
6
(input)
P5
1
(I/O) / RxD
2
(input) / IRQ
5
(input)
P5
0
(I/O) / TxD
2
(output) / IRQ
4
(input)
Pin functions in modes 4 to 6
P5
3
(I/O) / ADTRG (input) / IRQ
7
(input) / WAIT (input) / BREQO (output)
P5
2
(I/O) / SCK
2
(I/O) / IRQ
6
(input)
P5
1
(I/O) / RxD
2
(input) / IRQ
5
(input)
P5
0
(I/O) / TxD
2
(output) / IRQ
4
(input)
Port 5
Figure 9.5 Port 5 Pin Functions