Quectel M12

M12 Hardware Design
M12_Hardware_Design_V3.3 - 22 -
SIM_VDD
12
O
Voltage supply for
SIM card
The voltage can be
selected by software
automatically. Either
1.8V or 3V.
All signals of SIM
interface should be
protected against
ESD with a TVS
diode array.
Maximum trace
length is 200mm
from the module
pad to SIM card
holder.
SIM_DATA
13
I/O
SIM data
SIM_VDD=3V
VILmax=0.4V
VIHmin=
SIM_VDD-0.4
VOLmax=0.4V
VOHmin=
SIM_VDD-0.4
SIM_VDD=1.8V
VILmax=
0.15×SIM_VDD
VIHmin=
SIM_VDD-0.4
VOLmax=
0.15×SIM_VDD
VOHmin=
SIM_VDD-0.4
SIM_CLK
14
O
SIM clock
SIM_VDD=3V
VILmax=0.4V
VIHmin=
0.9×SIM_VDD
VOLmax=0.4V
VOHmin=
0.9×SIM_VDD
SIM_VDD=1.8V
VILmax=
0.12×SIM_VDD
VIHmin=
0.9×SIM_VDD
VOLmax=
0.12×SIM_VDD
VOHmin=
0.9×SIM_VDD
SIM_RST
15
O
SIM reset
SIM_VDD=3V
VILmax=0.36V
VIHmin=
0.9×SIM_VDD
VOLmax=0.4V
VOHmin=
0.9×SIM_VDD
SIM_VDD=1.8V
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