h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 270

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 9 I/O Ports
9.4
9.4.1
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), and external interrupt input pins (IRQ4, 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 9.3.
9.4.2
Table 9.6 shows the configuration of port 3 registers.
Table 9.6
Notes: * Lower 16 bits of the address.
Rev. 5.00 Sep 22, 2005 page 244 of 1136
REJ09B0257-0500
Name
Port 3 data direction register
Port 3 data register
Port 3 register
Port 3 open drain control register
Port 3
Overview
Register Configuration
Port 3 Register Configuration
Port 3
Figure 9.3 Port 3 Pin Functions
Abbreviation
P3DDR
P3DR
PORT3
P3ODR
Port 3 pins
P37
P36
P35
P34
P33
P32
P31
P30
(I/O)
(I/O)
(I/O) / SCK1 (I/O) / IRQ5 (input)
(I/O) / RxD1 (input)
(I/O) / TxD1 (output)
(I/O) / SCK0 (I/O) / IRQ4 (input)
(I/O) / RxD0 (input)
(I/O) / TxD0 (output)
R/W
W
R/W
R
R/W
Initial Value
H'00
H'00
Undefined
H'00
Address *
H'FE32
H'FF02
H'FFB2
H'FE46