Working with Peggy2 Board. Using the Truth Table on page 2 of datasheet, I get pins turning on that do not match the datasheet table. I have Atmegga328P connected to Decoder CD74HC154 as shown on attached schematic. Converting Pin connections to Arduino Pins: ATMEGA Arduino 74HC154 2 0 23 3 1 …

CD74HC154 Decoder - Why does it not follow Datasheet Truth Table?

LarryD April 22, 2018, 11:38pm 2

Avoid pins D0 and D1 as they are for serial communications.

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