topic Re: imx-rt boot pin configuration in i.MX RT Crossover MCUs

imx-rt boot pin configuration

martinribelotta — Sat, 30 Jun 2018 04:46:45 GMT

Hello. I'm starting a development of imx-rt1021 board using as reference the MIMXRT1020HDUG (Hardware Development Guide), the reference manual (IMXRT1020RM)

In IMXRT1020RM, page 292, section 8.4.2 the table 8-4 specifies this pin bootstrap configuration:

But, in the datasheet (IMXRT1020CEC), page 72, section 5.1, the table 66 is:

This is consistent with page 8 of hardware reference manual (MIMXRT1020HDUG), Figure 2:

And the MIMXRT1020-EVK implementation (Sheet 14)

In concret. The BOOT[1:0] is from GPIO_EMC[17:16] or GPIO_AD_B0_[04:03]?

Re: imx-rt boot pin configuration

CarlosCasillas — Tue, 03 Jul 2018 03:12:12 GMT

Hi Martin,

According with the table of i.MX RT1020 Reference Manual section 4.1.1 “Muxing Options”, the boot select pins are also mapped to GPIO_EMC pins, so it seems to be a typo on Table 8-4.

I have reported this issue, thanks a lot for your feedback. I will post an additional reply when confirming the correct information.

Hope this will be useful for you.
Best regards!
/Carlos

Re: imx-rt boot pin configuration

CarlosCasillas — Tue, 03 Jul 2018 21:02:45 GMT

Hi Martin,

The internal revision concluded that Table 8-4 of the Reference Manual is a mistake. Thanks a lot for your feedback reporting this issue.

Hope this will be useful for you.
Best regards!
/Carlos
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