Which SPI mode are SD Cards? 0,1,2,3

[blueroomelectronics]

I'm pairing up a DS1390/1/4 RTCC and want to use one that's mode compatible.

 

[Sceadwian]

SD cards can be accessed in five modes, only ONE of them is compatible with SPI

SPI is OPTIONAL on micro SD cards so it depends on the card you're interfacing to. Wiki says it all in.
Secure Digital - Wikipedia, the free encyclopedia

 

[DirtyLude]

You can probably get more hits googling it if you look for 'polarity' and 'phase' settings rather than Mode.

Polarity and Phase are both 0, so mode 0.

 

[blueroomelectronics]

Mode 0 seems right, that means a DS1390