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UPD65 Datasheet(PDF) 8 Page - NEC

Part # UPD65
Description  4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
PDF  64 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD65 Datasheet(HTML) 8 Page - NEC

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µPD64A, 65
Data Sheet U14380EJ2V0DS00
1.3 Dealing with Unused Pins
The following connections are recommended for unused pins.
Table 1-1. Connections for Unused Pins
Pin
Connection
Inside the microcontroller
Outside the microcontroller
KI/O
INPUT mode
—
Leave open
OUTPUT mode
High-level output
REM
—
S1/LED
OUTPUT mode (LED) setting
S0
OFF mode setting
Directly connect these
S2
—
pins to GND
K1
—
Caution The I/O mode and the terminal output level are recommended to be fixed by setting
them repeatedly in each loop of the program.



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