Quectel EC200A Series User Manual

LTE Standard Module Series
4.6. SDIO Interface
The module provides one SD card interface which supports SD 3.0 protocol.
Table 19: Pin Definition of SD Card Interface
The following figure illustrates a reference design of SD card interface with the module.
SD Card Connector
DAT2
CD/DAT3
CMD
VDD
CLK
VSS
DAT0
DAT1
DETECTIVE
Module
SD_SDIO_DATA3
SD_SDIO_DATA2
SD_SDIO_DATA1
SD_SDIO_VDD
SD_SDIO_DATA0
SD_SDIO_CLK
SD_SDIO_CMD
SD_DET
R1 0R
R7
NM
R8
NM
R9
NM
R10
NM
R11
NM
VDD_3V
R2 0R
R3 0R
R4 0R
R5 0R
R6 0R
C2
NM
D2
C3
NM
D3
C4
NM
D4
C5
NM
D5
C6
NM
D6
C1
NM
D1
C7
10 pF
D7
C8
33 pF
C9
100 nF
C10
100 uF
+
Figure 25: Reference Circuit of SD Card Interface
to the host RTS.
Pin Name
Pin No.
I/O
Description
Comment
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
DIO
SD card SDIO
command
SD_SDIO_DATA0
31
DIO
SD card SDIO bit 0
SD_SDIO_DATA1
30
DIO
SD card SDIO bit 1
SD_SDIO_DATA2
29
DIO
SD card SDIO bit 2
SD_SDIO_DATA3
28
DIO
SD card SDIO bit 3
SD_SDIO_VDD
34
PO
SD card SDIO power
supply
SD_DET*
23
DI
SD card hot-plug
detect
1.8 V power domain.
If unused, keep it
open.

Quectel EC200A Series Specifications

General

Brand	Quectel
Model	EC200A Series
Category	Control Unit
Language	English