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SAMD10 Reset and SWD lines shared with GPIO lines

Posted: Mon Aug 15, 2016 9:43 pm
by gussabina
Hello All:

According the SAMD10 datasheet, the Reset line is shared with PA28, and SWD lines with PA30/31.
However, looking at the I/O Multiplexing table, there is no mention of Reset and SDIO lines, so how is this supposed to work?
I mean, is Reset and SDIO lines selected by default? If the user wants to use PA28, how this is selected in the multiplexer? (PA28 is the default function...).

I worked with SAMD21 a lot, but in this case, it's not clear to me how this is supposed to work. Any help?

Thanks
Gus

Re: SAMD10 Reset and SWD lines shared with GPIO lines

Posted: Tue Aug 16, 2016 12:10 am
by blue_z
gussabina wrote:If the user wants to use PA28, how this is selected in the multiplexer?
Instead of a multiplexer selection, the External Reset functionality must be disabled in the Power Manager subsystem.
Refer to the EXTCTRL register.

See section 6.2.2 for SWD configuration.

Regards