How to Delete COM based ISP Flashing feature for W78E052DDG controller

, Jan 30, 2025|
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Hello,

I want to  delete COM port based ISP Flashing facility of W78E052DDG controller.

how to do it ?


purpose: once flashed , it should not be flashed again using ISP.


Regard,

Nilesh

Reply

  • Hi Nilesh, 

    Need a universal/standalone programmer to set CBS to APROM (CBS=1).

    https://www.nuvoton.com/export/resource-files/W78E054D_W78E052D_A13.pdf#page=66

    Danny

    Helllo,

    universal programer available to program Winbond w78e052 can also program nuvoton w78e052?

    i mean both part same ?



    Regard,

    Nilesh

  • Hello Danny,

    Thanks for information. 

    as you suggested to set CBS=1 so avoid boot from ISP code but i saw in datasheet it is already "1" as default and i am able to upload code using ISP COM port.


    Regard,

    Nilesh

    Hi Nilesh, 

    Refer to the document Nuvoton 8051 ISP Programmer User Manual which comes up with the Nuvoton 8051 ISP-ICP Programming Tool.

    If you are able to use serial (COM) port to program the chip, means that the MCU already has the ISP code inside LDROM and CBS has been programmed to 0.

    So set CBS=1 boot from APROM directly might disable the ISP function.

    Danny


  • Hi,

    If isp code erased during flashing using universal programmer, how to add isp back? 


    Regard,

    Nilesh

    Hi Nilesh, 

    Download the Nuvoton_ISP-ICP_Programmer_v5.02.zip from their website, (3) Nuvoton Standard ISP Code should be in the archive.

    https://www.nuvoton.com/tool-and-software/software-tool/programmer-tool/


    Danny