Hi Philippe, On Fri, Jan 29, 2021 at 10:11 PM Philippe Mathieu-Daudé <f4...@amsat.org> wrote: > > Hi Bin, > > On 1/29/21 9:51 AM, Bin Meng wrote: > > From: Bin Meng <bin.m...@windriver.com> > > > > Unlike SD mode, when SD card is working in SPI mode, the argument > > of CMD13 is stuff bits. Hence we should bypass the RCA check. > > Is this for detecting events by polling? From spec v8: > > 5.7.5 Event Indication Method > 5.7.5.1 FX_EVENT (Bit06 of Card Status) > > An event indication method is introduced from Version 4.20. > Card may use Bit06 of R1 (R1b) response of any SD command > to indicate event generation. > > F.2 Concept of Event Detection Method > F.2.2 Host Implementation to use Event Detection Method >
I think you looked at the wrong place. See spec v8 chapter 7.3.1.3 Detailed Command Description "The card shall ignore stuff bits and reserved bits in an argument" and Table 7-3 Commands and Arguments CMD13 Argument [31:0] stuff bits Regards, Bin
