R5F2L3ACBNFP datasheet(159/848 Pages) RENESAS

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7. I/O Ports

REJ09B0441-0010 Rev.0.10

Jul 30, 2008

Page 123 of 809

Under development Preliminary specification

Specifications in this manual are tentative and subject to change.

R8C/L35A Group, R8C/L36A Group, R8C/L38A Group, R8C/L3AA Group,

R8C/L35B Group, R8C/L36B Group, R8C/L38B Group, R8C/L3AB Group

7.6

Unassigned Pin Handling

Table 7.24 lists Unassigned Pin Handling.

Notes:

1. If these ports are set to output mode and left open, they remain in input mode until they are switched

to output mode by a program. The voltage level of these pins may be undefined and the power

current may increase while the ports remain in input mode.

The content of the direction registers may change due to noise or program runaway caused by

noise. In order to enhance program reliability, the program should periodically repeat the setting of

the direction registers.

2. Connect these unassigned pins to the MCU using the shortest wire length (2 cm or less) possible.

3. When power-off mode is not used.

4. When the power-on reset function is used.

Figure 7.6

Unassigned Pin Handling

Table 7.24

Unassigned Pin Handling

Pin Name

Connection

Ports P0 to P7,

Ports P10, P11, 12_2, P12_3

• After setting to input mode, connect each pin to VSS via a resistor

(pull-down) or connect each pin to VCC via a resistor (pull-up). (2)

• After setting to output mode, leave these pins open. (1, 2)

Ports P12_0, P12_1

Connect to VCC via a pull-up resistor. (2)

VREF

Connect to VCC.

WKUP0 (3)

Connect to VSS. (3)

RESET (4)

Connect to VCC via a pull-up resistor. (4)

Notes:

1. When the power-on reset function is used.

2. When power-off mode is not used.

MCU

Ports P0 to P7,

Ports P10, P11

Ports P12_2, P12_3

(Input mode )

(Input mode)

(Output mode)

Open

RESET (1)

VREF

WKUP0 (2)

Ports P12_0, P12_1

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