MCU version: 02 & 03

0x91 REBOOT_MODE
    0 - reset and boot from SPI
    1 - reset normal
    2 - reset and boot from eMMC

0x92 BOOT_FLAG
    0 - normal
    1 - press FUNC boot-up
    2 - reset from SPI boot-up
    3 - reset from eMMC boot-up