3819 datasheet(85/218 Pages) RENESAS

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3819 Group USER’S MANUAL

MITSUBISHI MICROCOMPUTER

3819 Group

2.1 I/O port

2. APPLICATION

P0, P1, P20–P23, P3, P9

P24–P27, P41–P44, P46, P47, P5, P6,

P7, P8, PA, PB

P40

P45

VEE, AVSS

VREF

Fig. 2.1.3 Structure of Port Pi direction register (i = 4, 5, 6, 7, 8, A, B)

2.1.2 Handling of unused pins

Table 2.1.1 Handling of unused pins

Open

• Set to the input mode and connect to VCC or VSS through each resistor.

• Set to the output mode and open at “L” or “H.”

Connect to VSS(GND) through the resistor.

Connect to VCC through the resistor.

Connect to VSS(GND).

Connect to VSS(GND) through the resistor.

Name of Pins/Ports

Handling

Port Pi direction register

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

Name

Port Pi direction register

Port Pi direction register (PiD) (i = 4, 5, 6, 7, 8, A, B)

[Address:09 16, 0B16, 0D16, 0F16, 1116, 1516, 1716]

0 : Port Pi0 input mode

1 : Port Pi0 output mode

0 : Port Pi1 input mode

1 : Port Pi1 output mode

0 : Port Pi2 input mode

1 : Port Pi2 output mode

0 : Port Pi3 input mode

1 : Port Pi3 output mode

0 : Port Pi4 input mode

1 : Port Pi4 output mode

0 : Port Pi5 input mode

1 : Port Pi5 output mode

0 : Port Pi6 input mode

1 : Port Pi6 output mode

0 : Port Pi7 input mode

1 : Port Pi7 output mode

(Note)

Note :

(Note)

Port P4 direction register [Address:09 16]

Ports P40 and P45 are input ports. Accordingly, these bits do not have a

direction register function.

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