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ViewSonic Corporation
Confidential - Do Not Copy VX712
3.2.3 Fig 3.2.3 shows the setting for security code of hardware ISP, it needs 4 Command
No, and key in command sequentially for 94, 94, AC, CA, 53.
Fig 3.2.3
Step 3. Let VX712 set to be connected with AC cable and VGA cable.
Step 4. Use ISP to program MCU.
4.3.1 Select MTV type first, load the binary or Intel hex file that you want to program into
the MCU, and select “Auto” item, then press “RUN” button, see Fig 4.3.1.
4.3.2 If user changes the MTV type, it must load file again, or the buffer of load file will be
cleared.
4.3.3 CRC (cyclic redundancy check): the host can check CRC register’s result instead of
reading every byte in flash. The message of “Check MCU CRC OK” means that the Host
verify ok for the progress of program.
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