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HUAWEI MG323 GSM M2M Module
Hardware Guide
Electrical and Reliability Features
Issue 04 (2011-08-22)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
38
Function
Signal Name
I/O
Waveform and
Level
Remarks
INTEAR_N
AO
Negative end of differential speaker audio
output through channel 1
NC pin
NC
Pins 9, 13, 15, 17, 19, 21, 26, 27, 30, 31, and
39 are internal pins. These pins need to be
left floating when they are used.
P indicates power pins; I indicates pins for digital signal input; O indicates pins for digital signal
output; AI indicates pins for analog signal input; AO indicates pins for analog signal output.
5.5 Power Supply Features
5.5.1 Input Power Supply
Table 5-5 lists the requirements for input power of the MG323 module.
Table 5-5 Requirements for input power of the MG323 module
Parameter
Minimum Value
Typical Value
Maximum Value
Unit
VBAT
3.3
3.8
4.8
V
VCOIN
2
3
3.15
V
5.5.2 Working Current
Table 5-6 lists the working current of the MG323 module.
Table 5-6 Working current of the MG323 module
Working Mode
Maximum Value
Unit
Power-off mode
47
µA
Standby mode
DRX = 2
I < 3.0
mA
DRX = 5
I < 2.5
mA
DRX = 9
I < 2.0
mA
GPRS mode
460
mA