H8SSLASH2225 datasheet(429/1071 Pages) RENESAS

部件名	H8S/2225

功能描述	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	1071 Pages

Scroll/Zoom	100%

制造商	RENESAS [Renesas Technology Corp]

网页	http://www.renesas.com

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429 / 1071 page

Section 10 I/O Ports

Rev. 5.00 Aug 08, 2006 page 343 of 982

REJ09B0054-0500

10.9

Port D

Port D is an 8-bit I/O port and has the following registers.

• Port D data direction register (PDDDR)

• Port D data register (PDDR)

• Port D register (PORTD)

• Port D pull-up MOS control register (PDPCR)

10.9.1

Port D Data Direction Register (PDDDR)

PDDDR specifies input or output the port D pins using the individual bits. PDDDR cannot be

read; if it is, an undefined value will be read. This register is a write-only register, and cannot be

written by bit manipulation instruction. For details, see section 2.9.4, Access Methods for

Registers with Write-Only Bits.

Bit

Bit Name

Initial Value

R/W

Description

PD7DDR

PD6DDR

PD5DDR

PD4DDR

PD3DDR

PD2DDR

PD1DDR

PD0DDR

When a pin is specified as a general purpose I/O port,

setting this bit to 1 makes the corresponding port D

pin an output port. Clearing this bit to 0 makes the pin

an input port.

H8S/2225 数据表(PDF) 429 Page - Renesas Technology Corp