HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 271

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

8.4
8.4.1
Port 3 is a 6-bit I/O port. Port 3 pins also function as SCI I/O pins (TxD0, RxD0, SCK0, TxD1,
RxD1, and SCK1) and interrupt input pins (IRQ4, IRQ5). Port 3 pin functions are the same in all
operating modes. The interrupt input pins (IRQ4, IRQ5) are Schmitt-triggered inputs.
Figure 8.3 shows the port 3 pin configuration.
8.4.2
Table 8.6 shows the port 3 register configuration.
Table 8.6
Notes: 1. Value of bits 5 to 0.
Name
Port 3 data direction register
Port 3 data register
Port 3 register
Port 3 open drain control register
2. Lower 16 bits of the address.
Port 3
Overview
Register Configuration
Port 3 Registers
Port 3
Figure 8.3 Port 3 Pin Functions
Abbreviation
P3DDR
P3DR
PORT3
P3ODR
Port 3 pins
P3
P3
P3
P3
P3
P3
5
4
3
2
1
0
(I/O)/
(I/O)/
(I/O)/
(I/O)/
(I/O)/
(I/O)/
SCK1
SCK0
RxD1
RxD0
TxD1
TxD0
R/W
W
R/W
R
R/W
(I/O)/
(I/O)/
(input)
(input)
(output)
(output)
Rev.3.00 Mar. 26, 2007 Page 229 of 772
IRQ5 (input)
IRQ4 (input)
Initial Value*
H'00
H'00
Undefined
H'00
Section 8 I/O Ports
REJ09B0355-0300
1
Address*
H'FEB2
H'FF62
H'FF52
H'FF76
2