HD6432633 Datasheet, PDF (511/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

10B.3 Port 3
10B.3.1 Overview
Port 3 is an 8-bit I/O port. Port 3 is a multi-purpose port for SCI I/O pins (TxD0, RxD0, SCK0,
TxD1, RxD1, SCK1, TxD4, RxD4, and SCK4) and external interrupt input pins (IRQ4 and IRQ5).
All of the port 3 pin functions have the same operating mode. The configuration for each of the
port 3 pins is shown in figure 10B-2.
Port 3
Port 3 pins
P37 (I/O) / TxD4 (output)
P36 (I/O) / RxD4 (input)
P35 (I/O) / SCK1 (I/O) /
SCK4 (I/O) / IRQ5 (input)
P34 (I/O) / RxD1 (input)
P33 (I/O) / TxD1 (input)
P32 (I/O) / SCK0 (I/O) / IRQ4 (input)
P31 (I/O) / RxD0 (input)
P30 (I/O) / TxD0 (output)
Figure 10B-2 Port 3 Pin Functions
10B.3.2 Register Configuration
Table 10B-4 shows the configuration of port 3 registers.
Table 10B-4 Port 3 Register Configuration
Name
Port 3 data direction register
Port 3 data register
Port 3 register
Port 3 open drain control register
Note: * Lower 16 bits of the address.
Abbreviation
P3DDR
P3DR
PORT3
P3ODR
R/W Initial Value
W H'00
R/W H'00
R
Undefined
R/W H'00
Address*
H'FE32
H'FF02
H'FFB2
H'FE46
457