Disclaimer: Always verify your exact MCU and screen resolution before flashing firmware. Incorrect updates will void your warranty and potentially destroy the unit.
The YT9216BJ series typically runs on an (MediaTek) chipset, which is a standard processor for entry-level "Chinese" Android stereos. While the model number "YT9216BJ-00012-V001" specifically identifies the board revision, these units generally share the following baseline specs: Processor: Quad-core ARM Cortex-A7 (MT8227L). android yt9216bj-00012-v001
Are you looking for a firmware update, a datasheet, or are you trying to repair a bricked device? Disclaimer: Always verify your exact MCU and screen