Product Info

LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design
3-49
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Table 15: Pin Definition of SD Card Interface
Pin Name
Pin No.
I/O
Description
Comment
SDC2_DATA3
28
IO
SD card SDIO bus DATA3
SDIO signal level can be
selected according to SD
card supported level, more
details please refer to SD
3.0 protocol.
If unused, keep it open.
SDC2_DATA2
29
IO
SD card SDIO bus DATA2
SDIO signal level can be
selected according to SD
card supported level, more
details please refer to SD
3.0 protocol.
If unused, keep it open.
SDC2_DATA1
30
IO
SD card SDIO bus DATA1
SDIO signal level can be
selected according to SD
card supported level, more
details please refer to SD
3.0 protocol.
If unused, keep it open.
SDC2_DATA0
31
IO
SD card SDIO bus DATA0
SDIO signal level can be
selected according to SD
card supported level, more
details please refer to SD
3.0 protocol.
If unused, keep it open.
SDC2_CLK
32
DO
SD card SDIO bus clock
SDIO signal level can be
selected according to SD
card supported level, more
details please refer to SD
3.0 protocol.
If unused, keep it open.
SDC2_CMD
33
IO
SD card SDIO bus command
SDIO signal level can be
selected according to SD
card supported level, more
details please refer to SD
3.0 protocol.
If unused, keep it open.
VDD_SDIO
34
PO
SD card SDIO bus pull up power
1.8V/2.85V configurable.
Cannot be used for SD
card power. If unused,
keep it open.