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3.9
SD Interface
MODULE provides a 4-bit SD/MMC/eMMC interface with clock rate up to 200 MHz
When connected to a SD or MMC card, the voltage of SD interface is 1.8/2.85V, which is
compatible with Secure Digital Physical Layer Specification version 3.0 and SDIO Card
Specification version 3.0.It supports up to 128GB SD cards.
When connected to a eMMC card, the interface voltage will be a single 1.8V, which is compatible
with eMMC Specification, version 4.5. It supports up to 128GB eMMC cards.
Table 17 : SD/MMC electronic characteristic as 2.85V (SD_DATA0-3，SD_CLK and
SD_CMD)
Symbol
Parameter
V
High-level input voltage
IH
V
Low-level input voltage
IL
V
High-level output voltage
OH
V
Low-level output voltage
OL
Table 18: SD/MMC/eMMC electronic characteristic as 1.8V (SD_DATA0-3，SD_CLK
Symbol
Parameter
V
High-level input voltage
IH
V
Low-level input voltage
IL
V
High-level output voltage
OH
V
Low-level output voltage
OL
SIM7600NA_user manual _V1.00
Figure 268: Audio codec reference circuit
Min.
0.65*2.85
-0.3
0.75*2.85
0
and SD_CMD)
Min.
0.7*1.8
-0.3
1.8-0.4
0
42
Smart Machine Smart Decision
Typ.
Max.
-
2.85+0.3
0
0.25*2.85
2.85
2.85
0
0.15*2.85
Typ.
Max.
-
1.8+0.2
0
0.3*1.8
1.8
1.8
0
0.45
2020-1-7
.
Unit
V
V
V
V
Unit
V
V
V
V
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