ViewSonic VA912-4 Service Manual page 49

Appendix C : Use ISP to program MCU
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 fig3.1
3.2 If user change the MTV type , it must load file again , or the buffer of load file will be cleared .
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 , see
Fig.3.2
ViewSonic Corporation
Fig. 3.1
Fig. 3.2
Confidential - Do Not Copy
46
VA912-4_VA912b-4