SDIO change order of data pins

[Mira H. (deactivated upon user]

Posted on May 08, 2017 at 16:18

Hi everyone,

Is it possible to change the order of the data pins by software? I messed up and connected D0 with D3 and D1 with D2 and so on, between an STM32F765 and a WLAN Chip WL1807 (TI).

I'm using STM32CubeMX.

Best regards,

Mira

#sdio #stm32f765

[S.Ma]

Posted on May 08, 2017 at 16:49

Probably not, otherwise the Alternate function table in the datasheet would be meaningless.

Seems this will be handy:

http://sg.element14.com/roadrunner/rrp-a-105/wire-0-15mm-assorted-pk-4/dp/5017233?ost=5017233&categoryIdBox=&selectedCategoryId=&searchView=table&iscrfnonsku=false

 

[Tesla DeLorean]

Posted on May 08, 2017 at 17:03

Other than modifying the in-memory buffers, no.

[Mira H. (deactivated upon user]

Posted on May 08, 2017 at 18:01

Thanks for answering so quickly.

I guess, scraping away the microstrip lines and rewiring won't work, since the four data lines need to be of the same length.

[S.Ma]

Posted on May 08, 2017 at 19:55

These are not differential lines. at 300ps per inch, it's doable 

[Tesla DeLorean]

Posted on May 08, 2017 at 22:32

I've wire-wrapped without incident, reasonably consistent lengths are sufficient.