H8SSLASH2224 datasheet(419/1071 Pages) RENESAS

Il numero della parte	H8S/2224

Spiegazioni elettronici	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	1071 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

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Section 10 I/O Ports

Rev. 5.00 Aug 08, 2006 page 333 of 982

REJ09B0054-0500

• Port B pull-up MOS control register (PBPCR)

10.7.1

Port B Data Direction Register (PBDDR)

PBDDR specifies input or output the port B pins using the individual bits. PBDDR 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

PB7DDR

PB6DDR

PB5DDR

PB4DDR

PB3DDR

PB2DDR

PB1DDR

PB0DDR

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

setting the bit to 1 makes the corresponding port B pin

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

input pin.

10.7.2

Port B Data Register (PBDR)

PBDR stores output data for port B pins.

Bit

Bit Name

Initial Value

R/W

Description

PB7DR

R/W

PB6DR

R/W

PB5DR

R/W

PB4DR

R/W

PB3DR

R/W

PB2DR

R/W

PB1DR

R/W

PB0DR

R/W

Output data for a pin is stored when the pin is

specified as a general purpose I/O port.

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