No boot option for LPUART on I.MX RT1021?

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No boot option for LPUART on I.MX RT1021?

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boramutluer1
Contributor I

Hi,

IMXRT1021 boot informations are provided in section 8.1 and page 287 of the referance manual. (IMXRT1020RM.pdf)

Peripheral    Instance    Port(IO function)     PAD                                Mode
LPUART         1             LPUART1_TX         GPIO_AD_B0_12           ALT2
                                      LPUART1_RX         GPIO_AD_B0_13           ALT2

But, LPUART1 peripheral is not found in the defined pads.

We ask for help with the correct pads for the LPUART1 peripheral for boot the device.

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victorjimenez
NXP TechSupport
NXP TechSupport

Hello Bora,

Table 8-1 of the reference manual it's wrong, thanks for catching that! I already reported this and it will be fixed in future releases.

LPUART1_RX and LPUART1_TX according to the IOMUX Controller are located in pins GPIO_AD_B0_07 and GPIO_AD_B0_06.

Hope it helps!

Victor.

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