How to prohibit freemaster from using j-link to connect to the chip (S32K144)

[LIZQ]

The S32K1xx chip can be connected using freemaster without any configuration. How can I disable this connection?

[LIZQ]

Is there a way to turn off or limit the standard BDM plug-in to protect the interface security?

[iulian_stan]

Hi @LIZQ,

Are you using PD-BDM (Packet Driven BDM) communication plugin ?

If so - you can disable it by updating the following definition in the embedded application (freemaster_cfg.h

#define FMSTR_DISABLE          1    /* To disable all FreeMASTER functionalities */

Note: FreeMASTER will still be able to connect to the board via standard BDM plugin to read and write target memory over debug interface. This plugin relies entirely on the J-Link Probe and on-target BDM/JTAG module and does not require FreeMASTER specific enablement.

[LIZQ]

Is there a way to turn off or limit the standard BDM plug-in to protect the interface security?

[iulian_stan]

The topic you want to address (disable/secure debug interface) is not related to FreeMASTER.

You may want to check CSEc (Cryptographic Service Engine compressed) Security Module first.

More information/details can be addressed on S32K144 product community space.