MIMXRT1064 Debug Connection

[joelbrown]

We are planning to use PEMicro USB Multilink Universal debugger with our MIMXRT1064 design.

We would like to use the MINI 10 connection but it lacks TRSTB signal.

PEMicro says that TRSTB is not needed, Can anybody confirm that this is the case?

Thanks

[joelbrown]

I think we need to program efuse BT_FUSE_SEL = 1  to enable boot from internal Flash, correct?

[kerryzhou]

Hi @joelbrown ,

  If you use the SWD as debugger, no fuse need to be burned.

   BT_FUSE_SEL = 1  will enable the fuse boot, but you can use the BOOT_MODE=10, which is the internal boot mode, you don't need to use the fuse boot when you don't burn any fuse bit.

Wish it helps you!

Best Regards,

kerry

[joelbrown]

In this case we need to connect pull down resistors to pins BOOT_CFG[0:7] correct?

[kerryzhou]

Hi @joelbrown ,

  Yes, if you use the BOOT_MODE from internal boot, the BOOT_CFG will need to check with the GPIOs not the fuse, so, yes, you are right: BOOT_CFG[0:7]=0.

   You can refer to the NXP MIMXRT1064-EVK board, with that CFG configuration is OK from the schematic, thanks.

Wish it helps you!

Best Regards,

kerry

[joelbrown]

Can we program fuses with this configuration?

[kerryzhou]

Hi @joelbrown ,

  Why you need to burn the fuse?

  You use SWD is enough, do you need to use JTAG?

Best Regards,

Kerry

[joelbrown]

Yes we can use SWD.

But I thought fuses may need to be programmed, I don't know much about it but it seems they can be used for Boot settings. Is there a case where we might need to program them? Can we do it using SWD or is JTAG required?

[kerryzhou]

Hi @joelbrown ,

   PE side is correct.

  RT1062 default is the SWD interface, don't need JTAG_nTRST.

  Confirmed.

  If you still have question about it, please kindly let me know.

Best Regards,

kerry