Pin Configurations. Figure 1-1. Pinout. ATmega32U4. ATmega16U4. 44-pin QFN/T. QFP. Overview - Datasheet ATmega16U4, ATmega32U4 - Complete Microchip
Clarification required for the ATmega32U4's documentation with regards to oscillators
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ATMEGA32U4 Datasheet(PDF) - ATMEL Corporation
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A-Star 32U4 Micro Programmable Module - RobotShop
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Qwiic Pro Micro USB-C (ATmega32U4) Hookup Guide - SparkFun Learn
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SOLUTION: Atmel 7766 8 bit avr atmega16u4 32u4 datasheet - Studypool
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