39
HUAWEI MG301 B2B Module
HardwareGuide
Electrical and Reliability Features
Function
Signal Name
I/O
Waveform and
Level
Remarks
SIM_CLK
O V
oHmin
=2.03 V
V
oLmax
=0.58 V
Clock signal of the SIM card
VSIM
P
V
oHmax
=3.00 V
V
otype
=2.90 V
V
oHmin
=2.75 V
Power voltage of the SIM card
GND
-
GND of the SIM card
SIM card
interface
(Class C)
SIM_RST
O V
oHmin
=1.44 V
V
oLmax
=0.36 V
Reset signal of the SIM card
SIM_DATA
I/O V
oHmin
=1.26 V
V
oLmax
=0.3 V
V
ILmax
=0.36 V
V
IHmin
=1.26 V
Data signal of the SIM card
SIM_CLK
O V
oHmin
=1.26V
V
oLmax
=0.36V
Clock signal of the SIM card
VSIM
P
V
oHmax
=1.95 V
V
otype
=1.80 V
V
oHmin
=1.65 V
Power voltage of the SIM card
GND
-
GND of the SIM card
UART1
UART1_RD O V
oLmax
=0.10 V
This interface can be used to transmit AT
communicatio
V
oHmin
=2.70 V
commands and data.
UART1_TD
I
n interface
V
ILmax
=0.40 V
UART1_RIN
G
O V
IHmin
=2.40 V
UART1_DSR O
UART1_RTS I
UART1_DTR I
UART1_CTS O
UART1_DCD O
Analog audio
interface
EXTMIC_N
AI
Negative end of differential headset MIC input
through channel 2
EXTMIC_P
AI
Positive end of differential headset MIC input
through channel 2
INTMIC_P
AI
Positive end of differential handset MIC input
through channel 1
Huawei Proprietary and Confidential Copyright ©
Huawei Technologies Co., Ltd
Issue 06 (2013-06-13)
