UPD750064CU datasheet(15/82 Pages) NEC

15 / 82 page

µPD750064, 750066, 750068, 750064(A), 750066(A), 750068(A)

Data Sheet U10165EJ2V0DS00

3.4 Recommended Connection of Unused Pins

Table 3-1. List of Recommended Connection of Unused Pins

Recommended Connection

P00/INT4

Connect to VSS or VDD.

P01/SCK

Independently connect to VSS or VDD via a resistor.

P02/SO/SB0

P03/SI/SB1

Connect to VSS.

P10/INT0, P11/INT1

Connect to VSS or VDD.

P12/TI1/INT2

P13/TI0

P20/PTO0

Input state:

Independently connect to VSS or VDD

P21/PTO1

via a resistor.

P22/PCL

Output state:

Leave open.

P23/BUZ

P30 to P33

P40 to P43

Connect to VSS (do not connect a pull-up resistor

P50 to P53

of mask option).

P60/KR0/AN4 to

Input state:

Independently connect to VSS or VDD

P63/KR3/AN7

via a resistor.

Output state:

Leave open.

P110/AN0 to P113/AN3

Connect directly to VSS or VDD.

XT1Note

Connect to VSS.

XT2Note

Leave open.

Connect directly to VDD.

AVREF

Connect to VSS.

AVSS

Note

When the subsystem clock is not used, set SOS.0 to 1 (so as not to

use the internal feedback resistor).

UPD750064CU Datasheet(PDF) 15 Page - NEC

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