topic Re: i.mx rt1050 booting from LPSPI in i.MX RT Crossover MCUs

i.mx rt1050 booting from LPSPI

christiangradl — Tue, 19 Jun 2018 13:41:53 GMT

What are the exact bootmode/pins settings for booting via LPSPI?

in the TRM table 8-8 there is no entry about this.

Above there stands

The chip supports these boot flash devices

Serial NOR/EEPROM boot via LPSPI

Re: i.mx rt1050 booting from LPSPI

igorpadykov — Tue, 19 Jun 2018 22:51:55 GMT

Hi Christian

pinmux settings are given in Table 8-1. ROM Bootloader Peripheral PinMux
i.MX RT1050 Processor Reference Manual

Boot mode only using fuse mode as shows Table 8-35 (there is no GPIO override mode),
fuse selections are given in Table 5-9. Fusemap Descriptions i.MX RT1050 Processor
Reference Manual
https://www.nxp.com/docs/en/reference-manual/IMXRT1050RM.pdf

Best regards
igor
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Re: i.mx rt1050 booting from LPSPI

christiangradl — Wed, 20 Jun 2018 03:33:51 GMT

in table 5-9 there is no definition for booting woth LPSPI. Register 0x450[7:0]???

I can select the LPSPI chipselect register 0x6D0, but how can i select the boot device for LPSPI,

as described in chapter 8-2

    The boot ROM supports these boot devices:
   • Serial NOR Flash via FlexSPI
   • Serial NAND Flash via FlexSPI
   • Parallel NOR Flash via SEMC
   • RAWNAND Flash via SEMC
   • SD/MMC
   • SPI NOR/EEPROM via LPSPI

Re: i.mx rt1050 booting from LPSPI

igorpadykov — Wed, 20 Jun 2018 10:34:45 GMT

boot ROM uses it as recovery device using one of the LPSPI ports,

please check description in sect.8.10 Recovery devices

Best regards
igor

Re: i.mx rt1050 booting from LPSPI

christiangradl — Wed, 20 Jun 2018 11:04:38 GMT

OK, thanx, that info helps.