User's Guide

LE910Cx Hardware User Guide
1VV0301298 Rev. 1.01 - 2016-02-16
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PAD
Signal
I/O
Function
Type
Comments
E12
SD/MMC_DATA0
I/O
SD Serial Data 0
1.8/2.95V
G12
SD/MMC_DATA1
I/O
SD Serial Data 1
1.8/2.95V
K12
SD/MMC_DATA2
I/O
SD Serial Data 2
1.8/2.95V
H12
SD/MMC_DATA3
I/O
SD Serial Data 3
1.8/2.95V
G13
SD/MMC_CD
I
SD card detect input
1.8V
Active Low
F13
VMMC
-
Power supply for MMC
card pull-up resistors
1.8/2.95V
Max Current is
50mA
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
10K
10K
10K
10K
10K
C=100nF
GND
External PS 3V
VMMC