H8S2245 datasheet(323/818 Pages) RENESAS

323 / 818 page

Section 8 I/O Ports

Rev.3.00 Mar. 26, 2007 Page 281 of 772

REJ09B0355-0300

8.13.3

Pin Functions

Port G pins also function as bus control signal output pins (

CS0 to CS3) the A/D converter input

pin (

ADTRG), and interrupt input pins (IRQ6, IRQ7). The pin functions are different in modes 1

and 2, modes 3 and 7, and modes 4 to 6. Port G pin functions are shown in table 8.24.

Table 8.24

Port G Pin Functions

Selection Method and Pin Functions

4/CS0

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

and bit PG4DDR.

Operating

Mode

Modes 1, 2, 4, 5, 6*

Modes 3 and 7*

PG4DDR

0101

Pin function

4 input pin

CS0 output pin PG

4 input pin

4 output pin

Note:

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

3/CS1

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

and bit PG3DDR.

Operating

Mode

Modes 1, 2, 3, 7*

Modes 4 to 6*

PG3DDR

0101

Pin function

3 input pin

3 output pin

3 input pin

CS1 output pin

Note:

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

2/CS2

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

and bit PG2DDR.

Operating

Mode

Modes 1, 2, 3, 7*

Modes 4 to 6*

PG2DDR

0101

Pin function

2 input pin

2 output pin

2 input pin

CS2 output pin

Note:

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

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