D78054 データシートの表示（PDF） - NEC => Renesas Technology

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D78054

8-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD78001B(A), 78002B(A)

3.3 PIN I/O CIRCUIT AND RECOMMENDED CONNECTION OF UNUSED PINS

The input/output circuit type of each pin and recommended connection of unused pins are shown in Table 3-1.

For the input/output circuit configuration of each type, see Fig. 3-1.

Table 3-1 Input/Output Circuit Type of Each Pin

Pin Name

P00/INTP0

P01/INTP1

P02/INTP2

P03/INTP3

P04/XT1

P10 to P17

P20 to P24

P25/SI0/SB0

P26/SO0/SB1

P27/SCK0

P30

P31/TO1

P32/TO2

P33/TI1

P34/TI2

P35/PCL

P36/BUZ

P37

P40/AD0 to P47/AD7

P50/A8 to P57/A15

P60 to P63

P64/RD

P65/WR

P66/WAIT

P67/ASTB

RESET

XT2

IC0, IC1, IC3

IC2

Input/Output

Circuit Type

2

8-A

I/O

Input

Input/output

16

5-A

10-A

Input

Input/output

5-A

8-A

5-A

5-E

5-A

13-B

5-A

2

Input

16

—

—

Recommended Connection when Not Used

Connected to VSS .

Connected to VSS through resistor independently.

Connected to VDD or VSS .

Connected to VDD or VSS through resistor independently.

Connected to VDD through resistor independently.

Connected to VDD or VSS through resistor independently.

Connected to VDD through resistor independently.

Connected to VDD or VSS through resistor independently.

—

Leave open.

Connected to VSS directly.

Connected to VDD directly.

13

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