Changes

'''U3''' - [http://web.archive.org/web/20200903011648/https://datasheet.octopart.com/ST72F324J6T6-STMicroelectronics-datasheet-14047.pdf 72F324J6T6 - ST72324 - Main Microcontroller, ST7 series] - 32K Flash, 1K RAM, 5VDC, 10-bit ADC (16 inputs, muxed), 4x Timer, SPI, SCI, 32-bits total I/O

* [http://web.archive.org/web/20200903011648/https://datasheet.octopart.com/ST72F324J6T6- STMicroelectronics-datasheet-14047.pdf 72F324J6T6 - ST72324 - Main Microcontroller, ST7 series Datasheet]* [https://web.archive.org/web/20200914132209/https://www.st.com/resource/en/programming_manual/cd00054959-st7-flash-programming-quick-reference-guide-stmicroelectronics.pdf ST7 Flash Programming Quick Reference Guide] - * [https://web.archive.org/web/20200914132013/https://www.st.com/resource/en/programming_manual/cd00004616-st7-family-flash-programming-reference-manual-stmicroelectronics.pdf ST7 Family Flash Programming Reference Manual] - * [https://web.archive.org/web/20200914132431/https://www.st.com/resource/en/programming_manual/cd00004617-st7-family-icc-protocol-reference-manual-stmicroelectronics.pdf ST7 Family ICC Protocol Reference Manual]