User's Manual

WM620 Hardware User Guide V1.1
All rights reserved by Shenzhen Neoway Technology Co., Ltd. Page 1
Contents
1 Features and Description ................................................................................................................................. 2
1.1 HW block diagram and block description ................................................................................................... 2
1.2 Key Features ................................................................................................................................................ 2
1.3 Pin assignment and description ................................................................................................................... 0
2 Applicable interface .......................................................................................................................................... 3
2.1 Power supply Interface ................................................................................................................................ 3
2.1.1 Power Supply Requirements ................................................................................................................ 3
2.1.2 VRTC Interface .................................................................................................................................... 5
2.1.3 Power Supply Output............................................................................................................................ 6
2.1.4 Power on Sequences ............................................................................................................................. 6
2.2 Power ON/OFF and Reset ........................................................................................................................... 6
2.2.1 ON_OFF ............................................................................................................................................... 6
2.2.2 RESET_N ............................................................................................................................................. 7
2.3 Module Status Output .................................................................................................................................. 7
2.3.1 LED Indicator ....................................................................................................................................... 7
2.3.2 Ring ...................................................................................................................................................... 8
2.4 SIM Card ..................................................................................................................................................... 9
2.5 USB Interface ............................................................................................................................................ 10
2.6 UART ......................................................................................................................................................... 11
2.6.1 Basic Descriptions of UART ............................................................................................................... 11
2.6.2 Level Translators for UART ................................................................................................................ 11
2.7 Audio interface .......................................................................................................................................... 13
3 Mechanics, Mounting and Packaging ........................................................................................................... 14
3.1 Dimension and PCB layout ....................................................................................................................... 14
3.2 Assembly ................................................................................................................................................... 14
3.3 Packaging and solder ................................................................................................................................. 15
4 Typical Application SCH ............................................................................................................................... 16
5 Abbreviations .................................................................................................................................................. 17