• PD0 (pin 16): digital I/O pin
• PD1 (pin 15): digital I/O pin
• PD2 (pin 14): digital I/O pin
• PD3 (pin 13): digital I/O pin
• PD4 (pin 12): digital I/O pin
• PD5 (pin 11): digital I/O pin
• PD6 (pin 10): digital I/O pin
• PD7 (pin 9): digital I/O pin

thank you, ChatGPT

• In Circuit Programming
  • for some reason the chip ran at 1/2 speed when doing this but the same chip ran at normal (32MHz) speed when using the bootloader. No fuses (that I know of) were changed. (???)
• low power mode with the arduino framework

• add this to .platformio.ini:

[env:program_via_ArduinoISP]
platform = lgt8f
framework = arduino
board = lgt8f328p-LQFP48
upload_protocol = custom
upload_port = /dev/ttyACM*
upload_speed = 19200
upload_flags =
    -v
    -V
    -C
    $PROJECT_PACKAGES_DIR/tool-avrdude/avrdude.conf
    -p
    $BOARD_MCU
    -P
    $UPLOAD_PORT
    -c
    stk500v1
upload_command = avrdude $UPLOAD_FLAGS -U flash:w:$SOURCE:i

• then choose update platforms, toolchains, etc. for the new environment to be recognized/loaded by CLion

If using ISP and you run out of memory you can overwrite the bootloader if you wish (and I wish because I did). In boards.txt change 328.upload.maximum_size=29696 to 328.upload.maximum_size=30720

• software reset:

    VDTCR = 0x80; // make register writeable for a short time
    VDTCR = 0x00; // clear bit 6