H8S2245 datasheet(317/818 Pages) RENESAS

317 / 818 page

Section 8 I/O Ports

Rev.3.00 Mar. 26, 2007 Page 275 of 772

REJ09B0355-0300

Selection Method and Pin Functions

4/HWR

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

and bit PF4DDR.

Operating

Mode

Modes 1, 2, 4, 5, 6*

Modes 3 and 7*

PF4DDR

—

Pin function

HWR output pin

4 input pin

4 output pin

Note:

Modes 2, 3, 6, and 7 cannot be used in the H8S/2240.

3/LWR/IRQ3

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

and bit PF3DDR.

Operating

Mode

Modes

1, 2, 4, 5, 6*

Modes

3 and 7*

PF3DDR

—

Pin function

LWR output pin

3 input pin

3 output pin

IRQ3 interrupt input pin*1

Notes: 1. When this pin is used as an external interrupt input, it should not be

used as an input/output pin with other functions.

2. Modes 2, 3, 6, and 7 cannot be used in the H8S/2240.

2/WAIT/

BREQO/IRQ2

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

and the BREQOE bit, WAITE bit in BCRL, and PF2DDR bit.

Operating

Mode

Modes 1, 2, 4, 5, 6*

Modes 3 and 7*

BREQOE

—

WAITE

——

PF2DDR

——

Pin function

input pin

output pin

WAIT

input pin

BREQO

output pin

input pin

output pin

IRQ2 interrupt input pin*1

Notes: 1. When this pin is used as an external interrupt input, it should not be

used as an input/output pin with other functions.

2. Modes 2, 3, 6, and 7 cannot be used in the H8S/2240.

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