A SERVICE OF

logo

Open as PDF
next previous
HUAWEI MG323 GSM M2M Module
Hardware Guide
Electrical and Reliability Features
Issue 06 (2013-06-13)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
39
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
communicatio
n interface
UART1_RD O V
oLmax
=0.10 V
V
oHmin
=2.70 V
V
ILmax
=0.40 V
V
IHmin
=2.40 V
This interface can be used to transmit AT
commands and data.
UART1_TD I
UART1_RIN
G
O
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