Quectel SC262R Series User Manual

Smart Module Series
SC200R&SC262R_Series_Hardware_Design 54 / 124
3.12. SD Card Interface
SD Card interface of SC200R series module supports SD 3.0 protocol. The pin definition of SD card
interface is shown below.
Table 16: Pin Definition of SD Card Interface
A reference circuit for the SD card interface is shown below.
SD_CMD
120K
NM_51K
SD_DATA3
SD_DATA2
SD_CLK
SD_DATA0
SD_DET
SD_DATA1
P1-DAT2
P2-CD/DAT3
P3-CMD
P4-VDD
P5-CLK
P8-DAT1
GND
P6-VSS
P7-DAT0
DETECTIVE
GND
GND
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
SD_LDO11
33R
33R
33R
33R
33R
33R
1K
33 pF
4.7 μF
SD_LDO12
Module
R1 R2
R3 R4
R5
R6
NM_51K
NM_10K
NM_51K
NM_51K
R7
R8
R9
R10
R11
R12
R13
D1 D2
D3
D4 D5
D6
D7
D8
C1
C2
SD Card Connector
LDO5_1V8
GND
R14
0R
Figure 17: Reference Circuit for SD Card Interface
Pin Name
Pin No.
I/O
Description
Comment
SD_CLK
39
DO
SD card clock
50 Ω characteristic
impedance.
SD_CMD
40
DIO
SD card command
SD_DATA0
41
DIO
SDIO data bit 0
SD_DATA1
42
DIO
SDIO data bit 1
SD_DATA2
43
DIO
SDIO data bit 2
SD_DATA3
44
DIO
SDIO data bit 3
SD_DET
45
DI
SD card hot-plug detect
Active low.
SD_LDO11
38
PO
2.95 V output power supply for SD card
Vnom = 2.95 V
I
O
max = 800 mA
SD_LDO12
32
PO
1.8/2.95 V output power supply for SD
card pull-up circuits.
Vnom = 1.8/2.95 V
I
O
max = 50 mA

Quectel SC262R Series Specifications

General

Brand	Quectel
Model	SC262R Series
Category	Control Unit
Language	English