User's Guide

LE910Cx HW User Guide
Doc#: 1VV0301298
Rev. 2.0 Page 76 of 120 2018-11-19
Figure 16 shows the recommended connection diagram of the SD interface.
Figure 16: SD/MMC Interface Connectivity
NOTE:
SD/MMC is supported only on the Linux side.
The power supply to the SD/MMC card is to be provided by the Host
application board. The LE910Cx does not provide a dedicated power supply
for the SD/MMC card.
VMMC Supply is limited to 50mA thus can only supply the MMC card
external pull-up resistors.
Pull-up resistors must be placed on the host application board.
The card detection input has an internal pull-up resistor.
VMMC can be used for enabling of the external power supply (LDO Enable
signal)
SD/MMC_DATA2
SD/MMC_DATA3
SD/MMC_CMD
SD/MMC_CLK
SD/MMC_DATA0
SD/MMC_DATA1
LE910Cx
SD/MMC Interface
SD/MMC_CD
DATA2
DATA3
CMD
VDD
VSS
DATA0
DATA1
MicroSD
MMC_CD
GND
GND
10
K
10
K
10
K
10
K
10
K
C=100nF
GND
External PS 3V
VMMC