topic Re: Can i.MX6 eFuse be programmed via JTAG? in i.MX Processors

Can i.MX6 eFuse be programmed via JTAG?

cbobek — Fri, 13 Apr 2018 22:18:32 GMT

Hi Community,

We have an i.MX6DL design currently in production. To program the eFuses in manufacturing, we use the USB Serial Downloader and U-Boot method.

For our next design, our CM would like to program the eFuses using JTAG instead of U-Boot to save time and reduce complexity for the ATE. Is this possible? If so, is documentation about this method available? I can find the Fusemap, but not methods for programming it other than U-Boot.

Thank you,

Chris

Re: Can i.MX6 eFuse be programmed via JTAG?

joanxie — Mon, 16 Apr 2018 08:38:46 GMT

pls refe to the application note as below:

https://www.nxp.com/docs/en/application-note/AN4686.pdf

Re: Can i.MX6 eFuse be programmed via JTAG?

cbobek — Mon, 16 Apr 2018 17:05:55 GMT

I have read that app note before, but it does not explain how to program the eFuses using the JTAG interface. The app note talks about how to enable secure JTAG by burning eFuses via the Manufacturing Tool (USB). I want to know if you have to use the MFG Tool or can the eFuses be accessed by the JTAG port?