HD64F2638F20J Datasheet, PDF (292/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 9 I/O Ports
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
9.3 Port 3
9.3.1 Overview
Port 3 is an 6-bit I/O port. Port 3 is a multi-purpose port for SCI I/O pins (TxD0, RxD0, SCK0,
TxD1, RxD1, SCK1), external interrupt input pins (IRQ4, IRQ5), and IIC I/O pins* (SCL0,
SDA0, SCL1, SDA1). 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. 9-2.
Note: * Available when using I²C bus interface as an option in the H8S/2638, H8S/2639, and
H8S/2630 (the product equipped with the I²C bus interface is the W-mask version).
Port 3 pins
Port 3
P35 (I/O) / SCK1 (I/O) / SCL0* (I/O) / IRQ5 (input)
P34 (I/O) / RxD1 (input) / SDA0* (I/O)
P33 (I/O) / TxD1 (input) / SCL1* (I/O)
P32 (I/O) / SCK0 (I/O) / SDA1* (I/O) / IRQ4 (input)
P31 (I/O) / RxD0 (input)
P30 (I/O) / TxD0 (output)
Note: * Available when using I²C bus interface as an option in the H8S/2638, H8S/2639, and H8S/2630
(the product equipped with the I²C bus interface is the W-mask version).
Figure 9-2 Port 3 Pin Functions
Page 242 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010