I understand you're looking for information on updating the firmware for an unit (typically an aftermarket Android car head unit). Here’s a solid, practical guide.
: Record your current "MCU" version and "Factory Setup" settings (often found under password General Firmware Update Procedure alps 8227l-demo firmware update
"Demo" is a default string hardcoded into the kernel by the board manufacturer. It indicates a baseline reference board design. I understand you're looking for information on updating