ViewSonic VX924 Service Manual page 51

2. If the user changes the MTV type, the file must be loaded again, as the previously loaded file will be cleared.
3. CRC (cyclic redundancy check): the host can check the result in the CRC register instead of reading every byte in flash.
The Check MCU CRC OK message indicates that the host has verified the program's CRC; see Fig.3.2.
Fig. 3.2
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