User's Manual

盟訊實業股份有限公司
Unication CO., LTD.
機密等級：□極機密 ■機密 □普通
第 12 页 共 25 页
3 Module application description
3.1 Power supply
3.3.1 Requirement
 Input power voltage range: 3.6~4.2V;
 Max Current: 2A;
 Internal resistance<180mΩ
3.3.2 Power up sequence
Insert battery-> Pull down ON_OFF signal and hold more than 3 seconds-> start the module.
3.3.3 Power up mode
This module can be started by 3 ways:
 Press ON_OFF signal;
 Plug in charger and the module is auto started ;
 Start by RTC
3.2 RF Antenna
 Impedance of Signal connected to RF antenna pin should be 50ohm;
 GND pins around RF antenna output pad should be well connected to mother board. It help to control impedance
and conducted hot from PA
 The line connected to module’s RF antenna pad on the mother board should be routed as a strip line to help
controlling EMC and preventing the impendence acutely change
 Pads of no connect define could be connected to GND to improve RF performances