The CINS bit seems wrong in the MMCHS0 MMCHS_PSTATE register in the XAM3359

335Nov

I'm getting a different bit changing in the MMCHS0 MMCHS_PSTATE register
than documented. It's supposed to be bit 16, CINS, but bit 18 is the bit that
is changing when the uSD card is inserted and removed. Little-endian vs
big-endian arrangement doesn't seem to explain this, since both of these
bits are in the same nibble and their positions have no symmetry.
This is with ball C15 pin-muxed as MMC0_SDCD.

over 11 years ago

0 Biser Gatchev-XID over 11 years ago

TI__Guru**** 393215 points

Check Table 18-35 in the AM335X TRM Rev. I. CINS works in conjunction with the CDP bit in SD_CON register. CDPL reflects the inverse value of the card detect input pin (SDCD).

0 335Nov over 11 years ago in reply to Biser Gatchev-XID

Expert 1120 points

Isn't CINS in MMCHS_PSTATE supposed to be changing? It is not, never mind the polarity. Is there something that has to be turned on to enable this bit? Why is only CDPL changing?

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The CINS bit seems wrong in the MMCHS0 MMCHS_PSTATE register in the XAM3359