MIMXRT1170-EVK LPUARTs

[andreas90]

As far as I can tell from the schematic of the MIMXRT1170-EVK board, the only UART available for external access is LPUART1, either via J11 USB port or directly via the J31/J32 connectors. However, I've seen other people in these forums mention e.g. LPUART4 being accessible by the CM4 (https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT1170-EVK-how-enable-PRINTF-for-use-on-secondar...).

So to clarify, on the MIMXRT1170-EVK board, which LPUARTs can I access from which core, and which of these are actually accessible from outside?

[EdwinHz · Accepted solution]

Hi @andreas90,

All LPUART modules are accessible to both cores.

As for which are accessible externally with the use of the Arduino Connector, that would be:

• LPUART12:
  • GPIO_LPSR_06: TXD
  • GPIO_LPSR_07: RXD
• LPUART11:
  • GPIO_LPSR_04: TXD
  • GPIO_LPSR_05: RXD
• LPUART8:
  • GPIO_AD_02: TXD
  • GPIO_AD_03: RXD
• LPUART7:
  • GPIO_AD_00: TXD
  • GPIO_AD_01: RXD
• LPUART5:
  • GPIO_AD_28: TXD
  • GPIO_AD_29: RXD
• LPUART3:
  • GPIO_AD_30: TXD
  • GPIO_AD_31: RXD
• LPUART2:
  • GPIO_DISP_B2_10: TXD
  • GPIO_DISP_B2_11: RXD

Hope this helps!

BR,
Edwin

[andreas90]

Thank you so much, that helps a lot!