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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.
35
Pin No.
Signal Name
Pin No.
Signal Name
19
NC
20
TERM_ON
21
NC
22
RESET
23
BATT_THERM
24
UART1_DCD
25
LED_STATUS
26
NC
27
NC
28
UART1_CTS
29
UART1_RD
30
NC
31
NC
32
UART1_DTR
33
UART1_TD
34
UART1_RTS
35
VCOIN
36
UART1_DSR
37
NC
38
UART1_RING
39
NC
40
VIO
41
GND
42
VBAT
43
GND
44
VBAT
45
GND
46
VBAT
47
GND
48
VBAT
49
GND
50
VBAT
Table 5-4 lists electrical features (typical values) measured when no external device
is connected to the MG323 module through the 50-pin B2B interface.
Table 5-4 Electrical features of application interfaces
Function
Signal Name
I/O
Waveform and
Level
Remarks
Power supply
interface
VBAT
P
V
I
= 3.30 V to
4.80 V
V
I
type =3.80 V
Pins 42, 44, 46, 48, and 50 are power supply
pins used to supply the MG323 module with
power. When the module transmits signals at
the maximum power, the transient current can
reach about 2 A, which may result in VBAT
voltage drop. The VBAT power voltage for the
MG323 module should not be lower than 3.3
V.
GND
P
Pins 41, 43, 45, 47, and 49 are power GND
pins.