Sd Card Interface - Quectel SC606T Series Hardware Design

EMI spurious transmission and enhance ESD protection. Ensure the ESD device is close to the
(U)SIM card connector.
⚫
Add 22 pF capacitors in parallel on USIM_DATA, USIM_CLK and USIM_RST signal traces so as to
filter RF interference, and place these capacitors as close to the (U)SIM card connector as possible.

3.11. SD Card Interface

The SD card interface of the module complies with SD 3.0 specifications. The pin definition of the SD card
interface is shown below.
Table 13: Pin Definition of SD Card Interface
Pin Name Pin No.
SD_LDO11 63
SD_LDO12 179
SD_CLK 70
SD_CMD 69
SD_DATA0 68
SD_DATA1 67
SD_DATA2 66
SD_DATA3 65
SD_DET 64
A reference design for SD card interface is shown as below.
SC606T_Series_Hardware_Design
I/O Description
PO SD card power supply
1.8/2.95 V output power for SD card
PO
pull-up circuits
DO SD card clock
DIO SD card command
DIO SDIO data bit 0
DIO SDIO data bit 1
DIO SDIO data bit 2
DIO SDIO data bit 3
DI SD card hot-plug detect
Smart Module Series
SC606T Series Hardware Design
Comment
Vnom = 2.95 V
I max = 800 mA
O
1.8/2.95 V output.
Control the characteristic
impedance at 50 Ω.
Active low.
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