User's Manual

LE920 Hardware User Guide
1vv0301026 Rev.8 2015-01-03
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 59 of 88
Connection diagram of the SD interface is shown below:
NOTE:
1. SDIO is supported only on the Linux side.
2. SD/MMC card supply shall be provided by the Host application board. LE920 doesn’t
provide a dedicated SD/MMC card supply.
3. Pull-up resistors should be place on the application host board
4. Card detection input has an internal pull-up resistor
SD/MMC_DATA2
SD/MMC_DATA3
SD/MMC_CMD
SD/MMC_CLK
SD/MMC_DATA0
SD/MMC_DATA1
LE920
SDIO Interface
SD/MMC_CD
Ext, Card supply
DATA2
DATA3
CMD
VDD
CLK
VSS
DATA0
DATA1
microSD
SW1
SW2
GND
GND
10K
10K
10K
10K
10K
C=100nF
GND