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HUAWEI MG301 B2B Module
HardwareGuide
Pin No.
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
Table 5-4 lists electrical features (typical values) measured when no external device
is connected to the MG301 B2B module through the 50-pin B2B interface.
Table 5-4 Electrical features of application interfaces
Function
Signal Name I/O Waveform and
Power supply
VBAT
interface
Signal Name
NC
NC
NC
NC
NC
NC
NC
LED_STATUS
NC
UART1_RD
NC
UART1_TD
RESERVE
NC
NC
GND
GND
GND
GND
GND
Level
P
V
=3.30 V to 4.80
I
V
V
=3.80 V
Itypical
Huawei Proprietary and Confidential Copyright ©
Huawei Technologies Co., Ltd
Issue 06 (2013-06-13)
Electrical and Reliability Features
Pin No.
Signal Name
12
INTMIC_P
14
EXTMIC_P
16
EXTMIC_N
18
NC
20
TERM_ON
22
RESET
24
UART1_DCD
26
NC
28
UART1_CTS
30
NC
32
UART1_DTR
34
UART1_RTS
36
UART1_DSR
38
UART1_RING
40
VIO
42
VBAT
44
VBAT
46
VBAT
48
VBAT
50
VBAT
Remarks
Pins 42, 44, 46, 48, and 50 are power supply
pins used to supply the MG301 B2B 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 great drop. The VBAT power
voltage for the MG301 B2B module should
not be lower than 3.3 V.
37
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