YUGE LPM2100 mg, Руководство пользователя

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LPM2100 mg NB Module Hardware User Guide
Shanghai Yuge Information Technology Co., Ltd. - 15 -
30 GPIO_1 IO Universal input/output port
31 GPIO_2 IO Universal input/output port
Antenna interface
26 BT_ANT IO Bluetooth antenna interface
(reserved) 50
Ω
characteristic
impedance
35 RF_ANT IO RF antenna interface 50
Ω
characteristic
impedance
8,21,25
，
44
RESERVED NC
Leave empty when
not in use
1
，
27
，
34
，
36
，
37
，
40
，
41
GND Ground signal
3.3 Power interface
The LPM2100 mg series module power connector consists of two parts
：

VBAT is the working power of the module;

VDD_EXT is the internal LDO output IO voltage domain (current load up to 50mA)
for external use
。
3.3.1 VBAT interface
The power supply VBAT has a power-on voltage range of 3.1~4.2V. The module powers
the internal RF and baseband circuitry through the VBAT pin. Under the premise of ensuring
that the VBAT power supply is sufficient, it is recommended to be close to the power input
and put 10pF, 0.1uF,1uF ceramic capacitor and 100uF tantalum capacitor. VBAT PCB traces
are as short and thick as possible
。
Figure 3-2 VBAT power supply