User's Manual

SIM7600G-H User manual
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Table 18: SD/MMC/eMMC electronic characteristic as 1.8V (SD_DATA0-3，SD_CLK and SD_CMD)
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
IH
High-level input voltage
0.7*1.8
-
1.8+0.2
V
V
IL
Low-level input voltage
-0.3
0
0.3*1.8
V
V
OH
High-level output voltage
1.8-0.4
1.8
1.8
V
V
OL
Low-level output voltage
0
0
0.45
V
Users should provide 2.85V to power SD card system and the current should more than 350mA, which is
showed below as VCC_SD. ESD/EMI components should be arranged beside SD card socket. Refer to the
following application circuit.
Figure 29: SD reference circuit
Users should provide 2.85V to power eMMC card system and 1.8V to power the SDIO_DATA/CMD/CLK
signals. The source of 2.85V should be able to provide more than 500mA* which showed below as
VCC_eMMC, as the source of 1.8V should be able to provide more than 300mA* which showed below as
VCCQ_1V8. ESD/EMI components should be arranged close to the eMMC card. Refer to the following
application circuit.