LTE Standard Module Series
EC200T Series Hardware Design
EC200T_Series_Hardware_Design 49 / 90
It is recommended to reserve an RC (R=22 Ω, C=22 pF) circuit on the PCM lines, especially for
PCM_CLK.
3.12. SD Card Interface
EC200T series provides an SD card interface, which complies with SD 3.0 specification.
The following table shows the pin definition of SD card interface.
Table 17: Pin Definition of SD Card Interface
Pin Name Pin No. I/O Description Comment
SD_DET* 23 DI SD card detect
1.8/2.8 V power domain.
If unused, keep it open.
SD_SDIO_DATA3 28 IO SD card SDIO data bit 3
1.8/2.8 V power domain.
If unused, keep it open.
SD_SDIO_DATA2 29 IO SD card SDIO data bit 2
1.8/2.8 V power domain.
If unused, keep it open.
SD_SDIO_DATA1 30 IO SD card SDIO data bit 1
1.8/2.8 V power domain.
If unused, keep it open.
SD_SDIO_DATA0 31 IO SD card SDIO data bit 0
1.8/2.8 V power domain.
If unused, keep it open.
SD_SDIO_CLK 32 DO SD card SDIO clock
1.8/2.8 V power domain.
If unused, keep it open.
SD_SDIO_CMD 33 IO SD card SDIO command
1.8/2.8 V power domain.
If unused, keep it open.
SD_SDIO_VDD 34 PO
SD card SDIO power
supply
1.8/2.8 V power domain.
If unused, keep it open.
The following figure shows a reference design of SD card interface.
NOTE
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