SD-Card Problem

Question

Hello,

I have a big problem.
I want to enable the scc sd card support.
But everytime I save the options and restart my Lattepanda Delta, it is still disabled.
Why?

Thanks,
T1g_i

anonymous · Answer

T1g_i wrote: ↑Fri May 24, 2019 8:45 am I set the option, restart the Delta, go into the bios and the option is still disabled.
Any other option is still set. But the sdcard option is everytime disabled.

Yes, I can confirm this behavior but don't know the reason why it is done that way.
I.e., In every bootup stage, such "SCC SD Card support" feature will always be disabled.
SCC (Storage Control Cluster) D27:F0 somehow was not able to be enabled/turned on.

SixSixSevenSeven · Answer

ccs_hello wrote: ↑Mon May 20, 2019 11:49 am re: the BIOS setting does not survive a power removal cycle (assuming that is the actual scenario)

The new LP Delta (assuming recent Alpha will be similar) is not shipped with the 3V lithium CR927 backup battery.
If that is the case, please get a CR927 (ebay or amazon have some cheap ones) battery and insert it into the empty slot.
<-- note the polarity (the metal battery clip has a "+" symbol on it, which should go with the flat side of the CR927 (which also has a "+" symbol)

Every other BIOS setting survives power cycling without the battery. Hell, they even persist through complete disconnection of power supply. BIOSes havent had battery backed settings for a decade.

T1g_i · Answer

I set the option, restart the Delta, go into the bios and the option is still disabled.
Any other option is still set. But the sdcard option is everytime disabled.

anonymous · Answer

re: the BIOS setting does not survive a power removal cycle (assuming that is the actual scenario)

The new LP Delta (assuming recent Alpha will be similar) is not shipped with the 3V lithium CR927 backup battery.
If that is the case, please get a CR927 (ebay or amazon have some cheap ones) battery and insert it into the empty slot.
<-- note the polarity (the metal battery clip has a "+" symbol on it, which should go with the flat side of the CR927 (which also has a "+" symbol)