Control voltage of eMMC

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#1

Hi,

I try to access the eMMC out of an own bare-metal application,
unfortunately with no success until now.

One of the parameters that has to be set in CPU is the bus-voltage the
eMMC has to be accessed with. For external SD-card (MMC0)
HS_MMCSD_SUPPORT_VOLT_1P8 and HS_MMCSD_SUPPORT_VOLT_3P0 are given. But
what is the correct value for eMMC (MMC1)?

Thanks!

#2

This is depend on your eMMC chip ,eMMC spec defines 2 types called either High voltage or Dual Voltage

#3

It is 3.3V. That is shown in the schematic and the manual.

Gerald