Product Info

LTE Module Series
EC25 Hardware Design
EC25_Hardware_Design 58 / 112
3.13. SD Card Interface
EC25 supports SDIO 3.0 interface for SD card.
The following table shows the pin definition of SD card interface.
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,
please refer to SD 3.0
protocol for more details.
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,
please refer to SD 3.0
protocol for more details.
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,
please refer to SD 3.0
protocol for more details.
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,
please refer to SD 3.0
protocol for more details.
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,
please refer to SD 3.0
protocol for more details.
If unused, keep it open.
SDC2_CMD 33 IO SD card SDIO bus command
SDIO signal level can be
selected according to SD