Quectel UMTS&LTE EVB - SD Card Interface (J701)

UMTS/HSPA/LTE Module Series
UMTS&LTE EVB User Guide
UMTS&LTE_EVB_User_Guide Confidential / Released 29 / 44
4.7. SD Card Interface (J701)
The UMTS&LTE EVB provides an SD card interface that supports maximally 32GB micro SD card. With
the SD card interface, customers can easily enhance the memory capacity of modules.
The following figure shows the simplified interface schematic for J701.
SD card
connector
DAT2
CMD
CD/DAT3
VDD
J101
J701
1
2
4
3
SD1_DATA2
SD1_DATA3
SD1_CMD
29
28
33
GND
CLK
DAT0
DAT1
5
6
8
7
SD1_CLK
SD1_DATA1
SD1_DATA0
32
31
30
VSS
VDD_3V3
Figure 22: Simplified Interface Schematic for SD Card Interface J701
1 2 3 4 5 6 7 8
Figure 23: Pin Assignments of J701
Quectel
Confidential