Atmel - ATmega1284-PU, 128K Flash, 5V, PDIP40
ATmega1284 Mighty pinout label/sticker - Microcontrollers - Arduino Forum
Help on 1284p bootloader :( - Microcontrollers - Arduino Forum
uLisp - ATmega1284
Arduino UNO*Pro ATmega1284P 40-pin DIP IC with bootloader
Atmega 1284p Installing Bootloader - Avrdude, stk500, Bootloader issues - Arduino Forum
GitHub - MCUdude/MightyCore: Arduino hardware package for ATmega1284, ATmega644, ATmega324, ATmega324PB, ATmega164, ATmega32, ATmega16 and ATmega8535
1284P-PU PCINTs and how do i use them? - Programming Questions - Arduino Forum
Technoblogy - Using the ATmega1284 with the Arduino IDE
ATmega1284 Mighty pinout label/sticker - Microcontrollers - Arduino Forum
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[SOLVED] Sanguino 1284p chip for Ender 2 - Installation & Troubleshooting - Arduino Forum
Uploading troubles to 1284p - Microcontrollers - Arduino Forum
Melzi 2.3 no support for 44-pin 1284p
The definitive guide to wiring BLTouch V3 on ICSP: No capacitor removal needed, no money wasted on pin 27 adapter and you keep the buzzer : r/ender3
1284p AVR_BOOT - Microcontrollers - Arduino Forum
1284p Bootloader w/Arduino as ISP - Microcontrollers - Arduino Forum
Melzi 2.3 no support for 44-pin 1284p
Installing BLTouch Auto Bed Leveling on the Creality CR-10 3D Printer : 6 Steps - Instructables
Arduino UNO*Pro ATmega1284P 40-pin DIP IC with bootloader
/i/43444/products/2019-11-29T22%3A42%3A03.969Z-Chip%20to%20Pin%20Descriptions%20-%20v2.jpg?1606306133 "Pro Mini XL - v2 - ATmega 1284p from Pro Mini Micros on Tindie")