h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 305

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Port 3 Open Drain Control Register (P3ODR)
P3ODR is an 8-bit readable/writable register, which controls the on/off of port 3 pins (P35 to
P30).
By setting P3ODR to 1, the port 3 pins become an open drain out, and when cleared to 0 they
become CMOS output.
P3ODR is initialized to B'**000000 by a reset and in hardware standby mode. The previous state
is maintained in software standby mode.
9.3.3
The port 3 pins double as SCI I/O input pins (TxD0, RxD0, SCK0, TxD1, RxD1, and SCK1)
external interrupt input pins (
SDA1). The functions of port 3 pins are shown in table 9-5.
Note: * Available when using I
H8S/2630 (the product equipped with the I
Pin Functions
¾
¾
¾
¾
I R Q 4
2
C bus interface as an option in the H8S/2638, H8S/2639, and
and
I R Q 5
) , and IIC I/O pins * (SCL0, SDA0, SCL1, and
2
C bus interface is the W-mask version).
Rev. 6.00 Feb 22, 2005 page 245 of 1484
Section 9 I/O Ports
REJ09B0103-0600