topic Re: About i.MX RT1170 Errata in i.MX RT Crossover MCUs

About i.MX RT1170 Errata

EMertCakir — Wed, 12 Mar 2025 10:54:52 GMT

i.MX RT 1170 Rev. 1.6 - 24 October 2024 errata document, a revision suggestion is given as follows.
"For new or updated designs, use 1.8V mode (1.71-1.98V) for the FSGPIO power supply" and "For i.MX RT1170, GPIO_AD/GPIO_LPSR/GPIO_DISP_B2 banks are FSGPIO"

I understand this revision suggestion, but; Is this suggestion valid for every IO, whether FSGPIO is used or not, because it also says something like this in the continuation of the document."The power supply pins, NVCC_GPIO, NVCC_LPSR and NVCC_DISP2 should be connected to 1.8V mode"

In other words, all GPIO_AD pins that are selected for general purpose and are 3v3 in my design should be selected as 1v8. Even if there is no signal with FSGPIO in the GPIO_AD bank?

Re: About i.MX RT1170 Errata

Masmiseim — Wed, 12 Mar 2025 11:59:52 GMT

Hello @EMertCakir,

check also the Technical Note “FSGPIO Failure Risk Assessment” (https://www.nxp.com/webapp/Download?colCode=TN00188)

If the signals you are using are all low-Speed Signals like I2C you shouldn’t also have any problems with 3V3

Regards

Re: About i.MX RT1170 Errata

EMertCakir — Wed, 12 Mar 2025 12:06:32 GMT

Hello.

Thank you for the answer.
‘The power supply pins, NVCC_GPIO, NVCC_LPSR and NVCC_DISP2 must be connected to 1.8V mode’ then according to this sentence, if my IOs are not fast signal, there is no problem in feeding the power bank with 3V3.

Re: About i.MX RT1170 Errata

Masmiseim — Wed, 12 Mar 2025 14:27:17 GMT

Exactly, high-frequency signals are problematic, in the technical note you will find detailed tables that illustrate this

Re: About i.MX RT1170 Errata

andersrosvall — Fri, 21 Mar 2025 05:18:21 GMT

NXP - will there be a new chip/mask revision of the iMX1170 family to solve the serious FSGPIO issue? There are many designs out in production that will eventually fail if this issue is not solved with a new chip/mask revision.

If there will be a new chip/mask revision, when can it be expected?

Re: About i.MX RT1170 Errata

EMertCakir — Fri, 21 Mar 2025 08:01:22 GMT

Hi @andersrosvall
In the chip errata document there is a statement like "A fix will be implemented on the next i.MX RT1170 revision."
You can ask your suppliers when they will do this.

Re: About i.MX RT1170 Errata

Masmiseim — Sun, 23 Mar 2025 16:21:10 GMT

Hello @andersrosvall,

Please talk to your NXP-FAE or sales contact or your distributor about this topic, as the next steps are not yet publicly documented.