topic Re: JTAG censorship in MPC5xxx

JTAG censorship

vincentbbbb — Tue, 01 May 2018 12:51:17 GMT

Hello,

I am using my own JTAG programmer and I was having difficulty inputting JTAG censorship value for my MPC5674F. I am able to read memory of an uncensored device, but when I put a censorship value, I am not able to read the memory. I was wondering at what moment the censorship data was compared to the one in Flash??? Is it right after it is sent via JTAG or is it when requesting a read command??

Regards

Re: JTAG censorship

davidtosenovjan — Thu, 03 May 2018 15:18:56 GMT

Hi, please pay attention to sections

8.5.7 Enabling Debug of a Censored Device and

31.3.4 CENSOR_CTRL Register

of device's RM:

https://www.nxp.com/docs/en/reference-manual/MPC5674FRM.pdf

If you are using your own debugger, I believe these chapters are understandable to you.

I could also point out following appnote:

https://www.nxp.com/docs/en/application-note/AN4365.pdf

Hope it helps a bit

Re: JTAG censorship

vincentbbbb — Fri, 31 Aug 2018 18:53:09 GMT

Hello,

I am still unable to uncensor the device through JTAG. Maybe my timings are not good. At which point the password entered through JTAG is compared with the one strored in memory. Is is right after reset is released??? At which point in time this comparison takes place???

Regards

Re: JTAG censorship

petervlna — Tue, 16 Jul 2019 11:09:41 GMT

Hi,

JTAG censorship is compared during reset phase.

Once you send the correct password the JTAG module will start communicating. Until then it behaves as there is no JTAG module on chip to external world.

regards,

Peter

Re: JTAG censorship

Jia_Jun_LI — Wed, 04 Jun 2025 09:00:17 GMT

Hello, my program is in Flash. I placed the demo program in the initialization of my program, but as a result, neither my boot nor my APP can start.