IWR6843: Questions about signal lines used to flash firmware via SPI

Tom Fisher

Part Number: IWR6843

Hi,

We are designing the product's PCB in which another MCU is used as the application controller which flashes IWR68343 via SPI. In this case, is it OK to simply ignore N5 and N5 pins and just connect to the four signal lines of SPIA?

Cheers,

Tom

over 5 years ago

0 CHETHAN KUMAR Y.B. over 5 years ago

TI__Mastermind 25835 points

Tom,

I guess you are referring to N5 and N4 balls right?. Primary booting of image requires UART pins through N5 and N4 balls, Hence you need to provide option for UART host, then you could perform secondary boot loading from SPI interface.

Please refer to below document from SDK

C:\ti\mmwave_sdk_03_0x_00_0x\packages\ti\utils\sbl\docs\SBL_design.pdf

For your convenience I have attached document.

/cfs-file/__key/communityserver-discussions-components-files/1023/SBL_5F00_design.pdf

Thanks and regards,

CHETHAN KUMAR Y.B.

0 Tom Fisher over 5 years ago in reply to CHETHAN KUMAR Y.B.

Expert 1440 points

CHETHAN，

Thanks

Tom

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IWR6843: Questions about signal lines used to flash firmware via SPI