Quectel EG21-G Hardware Design page 25

Lte module
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SDC2_
31
DATA0
SDC2_CLK
32
SDC2_CMD
33
SD_INS_
23
DET
EG21-G_Hardware_Design
SD card SDIO bus
IO
DATA0
SD card SDIO bus
DO
clock
SD card SDIO bus
IO
command
SD card insertion
DI
detect
EG21-G Hardware Design
1.8V signaling:
V
max=0.45V
OL
V
min=1.4V
OH
V
min=-0.3V
IL
V
max=0.58V
IL
V
min=1.27V
IH
V
max=2.0V
IH
3.0V signaling:
V
max=0.38V
OL
V
min=2.01V
OH
V
min=-0.3V
IL
V
max=0.76V
IL
V
min=1.72V
IH
V
max=3.34V
IH
1.8V signaling:
V
max=0.45V
OL
V
min=1.4V
OH
3.0V signaling:
V
max=0.38V
OL
V
min=2.01V
OH
1.8V signaling:
V
max=0.45V
OL
V
min=1.4V
OH
V
min=-0.3V
IL
V
max=0.58V
IL
V
min=1.27V
IH
V
max=2.0V
IH
3.0V signaling:
V
max=0.38V
OL
V
min=2.01V
OH
V
min=-0.3V
IL
V
max=0.76V
IL
V
min=1.72V
IH
V
max=3.34V
IH
V
min=-0.3V
IL
V
max=0.6V
IL
V
min=1.2V
IH
V
max=2.0V
IH
LTE Module Series
SDIO signal level can
be selected
according to SD card
supported level,
please refer to SD 3.0
protocol for more
details.
If unused, keep it
open.
SDIO signal level can
be selected
according to SD card
supported level,
please refer to SD 3.0
protocol for more
details.
If unused, keep it
open.
SDIO signal level can
be selected
according to SD card
supported level,
please refer to SD 3.0
protocol for more
details.
If unused, keep it
open.
1.8V power domain.
If unused, keep it
open.
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