Product Info

LTE-A Module Series
EG12 Hardware Design
EG12_Hardware_Design 62 / 100
and software debugging can be over USB2.0/3.0 (USB2.0 is recommended).
2. “*” means under development.
3.19. SDIO Interface*
EG12 provides one SDIO interface which supports SD 3.0 protocol and eMMC*. The following table
shows the pin definition.
Table 26: Pin Definition of SDIO Interface
The following figure shows an SDIO interface reference design.
Pin Name
Pin No.
I/O
Description
Comment
SD_VDD
46
PO
SD card application: SDIO pull up
power source
eMMC application: Keep it open
when used for eMMC
1.8V/3.0V configurable
output.
Cannot be used for SD
card power supply.
SD_DATA3
48
IO
SDIO data signal (bit 3)
If unused, keep it open.
SD_DATA2
47
IO
SDIO data signal (bit 2)
If unused, keep it open.
SD_DATA1
50
IO
SDIO data signal (bit 1)
If unused, keep it open.
SD_DATA0
49
IO
SDIO data signal (bit 0)
If unused, keep it open.
SD_CMD
51
IO
SDIO command signal
If unused, keep it open.
SD_DET
52
DI
SD card insertion detection
1.8V power domain.
If unused, keep it open.
SD_CLK
53
DO
SDIO clock signal
If unused, keep it open.