Toshiba 32LV703R Service Manual page 55

memory disk, if it is then the whole file with 2048K bytes (if it's a firmware) will
be copied to DDR memory first.
After copy is finished, program jump to DDR and copy the part of new
application into flash memory on board.
Once upgrade is done, program will keep waiting for reboot.
Internal Working Method, Continued
As boot code will not check any of checksum, care should be taken to avoid any
of invalid file with file name as Table 1. in USB flash memory while running
firmware upgrade process.
As boot code and application code are running independently, after program runs
to application code the boot code is not able to be found by application code, so it
is not possible to implement USB upgrade directly from application code.
This upgrade method can be done only when boot code is exist in flash memory.