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UPD6P4BMC-5A4 Datasheet(PDF) 9 Page - NEC |
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UPD6P4BMC-5A4 Datasheet(HTML) 9 Page - NEC |
9 / 32 page 9 µPD6P4B Data Sheet U13594EJ2V0DS00 1.4 Dealing with Unused Pins The following connections are recommended for unused pins in the normal operation mode. Table 1-1. Connections for Unused Pins Pin Connection Inside the microcontroller Outside the microcontroller KI/O INPUT mode — Open OUTPUT mode High-level output REM — S1/LED OUTPUT mode (LED) setting S0 OFF mode setting Directly connected to GND KI — RESETNote Built-in POC circuit Open Note If the circuit is an applied one requiring high reliability, be sure to design it in such a manner that the RESET signal is entered externally. 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. 1.5 Notes on Using KI Pin at Reset In order to prevent malfunction, be sure to input a low level to more than one of pins KI0 to KI3 when reset is released (when RESET pin changes from low level to high level, or POC is released due to supply voltage startup). |
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