H8SSLASH2214 datasheet(412/936 Pages) RENESAS

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Section 9 I/O Ports

Rev.4.00 Sep. 18, 2008 Page 352 of 872

REJ09B0189-0400

Pin Functions and Selection Method

PF3/

LWR/

IRQ3

The pin function is switched as shown below according to the operating mode, the bus

mode, and bit PF3DDR.

Operating mode

Modes 4 to 6

Mode 7

Bus mode

16-bit bus

mode

8-bit bus mode

—

PF3DDR

—

Pin function

LWR output PF3 input

PF3 output

PF3 input

PF3 output

IRQ3 input*

Note: * When used as an external interrupt input pin, do not use as an I/O pin for

another function.

PF2/

WAIT The pin function is switched as shown below according to the operating mode, bit

WAITE, and bit PF2DDR.

Operating mode

Modes 4 to 6

Mode 7

WAITE

—

PF2DDR

—

Pin function

PF2 input

PF2 output

WAIT input

PF2 input

PF2 output

PF1/

BACK/

BUZZ

The pin function is switched as shown below according to the operating mode, bit

BRLE, bit BUZZE in PFCR, and bit PF1DDR.

Operating mode

Modes 4 to 6

Mode 7

BRLE

—

PF1DDR

—

Pin function

PF1

input

PF1 output

BACK output

PF1

input

PF1 output

PF0/

BREQ/

IRQ2

The pin function is switched as shown below according to the operating mode, bit

BRLE, and bit PF0DDR.

Operating mode

Modes 4 to 6

Mode 7

BRLE

—

PF0DDR

—

Pin function

PF0 input

PF0 output

BREQ input PF0 input

PF0 output

IRQ2 input*

Note: * When used as an external interrupt input pin, do not use as an I/O pin for

another function.

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