Add the package to the arduino Boards Manager Urls:

• Go to Preferences
  • paste this url in Boards Manager URL: https://raw.githubusercontent.com/dbuezas/lgt8fx/master/package_lgt8fx_index.json
• Go to Tools/Board/Boards manager
  • Type lgt8fx in the search box
  • install lgt8fx

Now the boards appear in the IDE and you can also select the clock speed.

32Mhz is twice as fast as a conventional arduino nano!

• Fast_IO update
• Automatic prescaler setup
• In Menu support of 1, 2, 4, 8, 16 and 32 Mhz
• Digital Analog Converter
• Voltage References INTERNAL1V024/INTERNAL2V048/INTERNAL4V096/DEFAULT/EXTERNAL (useful for example for analogRead or DAC analogWrite via analogReference(xxx));
• Analog Comparator (page 224 of datasheet v1.0.4)
• Differential Amplifier. See this Example.
• Computation Accelerator (page 52 of datasheet v1.0.4) Work by others
• SoftwareSerial @32Mhz (stable up to 230400 baud)

• Support 32 Mhz and other clock speeds
• Differential Amplifier API
• Better Boards Menu
• Installation via Board Manager Urls
• SoftwareSerial @32Mhz
• FastIO ported from https://github.com/LGTMCU/Larduino_HSP

• 32Mhz 32.6mA
• 16Mhz 27.8mA
• 8Mhz 25.4mA
• 4Mhz 24.3mA
• 2Mhz 23.4mA
• 1Mhz 22.8mA

• Core is based on Larduino_HSP v3.6c with fastIO backported from https://github.com/LGTMCU/Larduino_HSP
• And inspired from Ralph Bacon's video: https://youtu.be/Myfeqrl3QP0 (Check his channel, he's uploaded a lot of great videos)
• Great place to gather data about this boards: https://github.com/RalphBacon/LGT8F328P-Arduino-Clone-Chip-ATMega328P
• Datasheet (Chinese) LGT8FX8P_databook_V1.04
• Datasheet (English) LGT8FX8P_databook_V1.04 thanks to #metallurge
• Datasheet (English) LGT8FX8P_databook_V1.05 By Watterrott
• Work on the differential amplifier
• "Forbiden tech from China has arrived" https://www.avrfreaks.net/forum/forbiden-tech-china-has-arrived?page=all
• Larduino ISP for 328d https://github.com/Edragon/LGT/tree/master/Toolchain/ISP/LarduinoISP-master
• https://www.eevblog.com/forum/projects/anyone-here-interested-in-the-logic-green-avrs-lgt8f328p/
• https://coultersmithing.com/forums/viewtopic.php?f=6&t=1149

I have no association with Arduino, Logic Green, Atmel or anything. I just wanted to have a convenient way to use these boards and get them to work without hacks at max speed

https://www.somsubhra.com/github-release-stats/?username=dbuezas&repository=lgt8fx

• #Larduino_HSP for doing 99.9999% of the work
• #RalphBacon introducing most of us to the board
• #dcfusor for help with fast io backporting
• #HI-SEBA for help with software serial
• #dwillmore for creating the wiki, serial adapter troubleshooting, more examples of boards and wemos-TTGO-XI board support