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4 processing of unused pins – NEC PD754144 User Manual

Page 31

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CHAPTER 2 PIN FUNCTIONS

31

User’s Manual U10676EJ3V0UM

2.4 Processing of Unused Pins

Table 2-3. Recommended Connection of Unused Pins

Pin

Recommended Connection

P30/PTO0

Input:

Independently connect to V

SS

or V

DD

via a resistor.

P31/PTO1

Output: Leave open.

P32/PTO2

P33

P60/AV

REF

P61/INT0

P62/PTH00

P63/PTH01

P70/KR4

Connect to V

DD

.

P71/KR5

P72/KR6

P73/KR7

P80

Input:

Independently connect to V

SS

or V

DD

via a resistor.

Output: Leave open.

KRREN

When this pin is connected to V

DD

, the internal reset signal is

generated at the falling edge of the KRn pin in the STOP mode.

When this pin is connected to V

SS

, the internal reset signal is not

generated even if the falling edge of the KRn pin is detected in the

STOP mode.

IC

Connect directly to V

DD

.

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