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How to work MMC_POW pin / SDBP bit of MMCHS_HCTL reg.
How to work MMC_POW pin / SDBP bit of MMCHS_HCTL reg.
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Posted by
Motoyasu Hattori
on
Feb 09 2012 03:15 AM
Intellectual
1160
points
Hi,
I have the following questions of MMC_POW pin and SDBP bit of MMCHS_HCTL reg on AM335x.
*1.
When users change SDBP bit on MMCHS_HCTL register, is "MMC_POW pin's state" also changed?
I
want to know whether there are relationship between SDBP bit and MMC_POW pin or not.
*2.
TRM said "
If the host controller detects the No card state, this bit is automatically cleared to 0."
If SD/MMC controller detects SD_card, is "this bit" automatically set to 1 or not??
Please let me know.
I want to know how to use MMC_POW pin.
Thanks and best regards,
M.HATTORI
AM335x
SD card
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