H8SSLASH2218 datasheet(273/750 Pages) RENESAS

Il numero della parte	H8S/2218

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

PDF	750 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

Homepage	http://www.renesas.com

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Section 8 I/O Ports

Rev.6.00 Jun. 03, 2008 Page 225 of 698

REJ09B0074-0600

8.2.4

Port 3 Open-Drain Control Register (P3ODR)

P3ODR controls the PMOS on/off state for each port 3 pin.

Bit

Bit Name Initial Value

R/W

Description

⎯

Undefined

⎯

Reserved

This bit is undefined and cannot be modified.

P36ODR

R/W

Setting a P3ODR bit to 1 makes the corresponding port 3

pin an NMOS open-drain output pin, while clearing the bit

to 0 makes the pin a CMOS output pin.

5 to

⎯

Undefined

⎯

Reserved

These bits are undefined and cannot be modified.

P32ODR

P31ODR

P30ODR

R/W

Setting a P3ODR bit to 1 makes the corresponding port 3

pin an NMOS open-drain output pin, while clearing the bit

to 0 makes the pin a CMOS output pin.

8.2.5

Pin Functions

Port 3 pins also function as SCI I/O pins and external interrupt input (

IRQ4) pins. The

correspondence between the register specification and the pin functions is shown below. The P36

pin must be used as the D+ pull-up control output pin of the USB. For details, refer to section 14,

Universal Serial Bus (USB).

Table 8.19

P36 Pin Function

P36DDR

Pin Function

P36 input pin

P36 output pin

(D+ pull-up control output pin of USB)

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