User's Manual

Phone: [phone] | E-mail: [e-mail]
Address : 2674 N. First Street, ste 220, San Jose, CA 95134
电话：[phone] | 传真：[phone] 转 111 | E-mail: [e-mail]
地址：天津市华苑产业区海泰西路 18 号西 3B-202（300384）
3
Table of Contents
WF43 Product Specification ............................................................................................................................................... 2
1 Software Architecture ................................................................................................................................................. 4
1.1 Protocol stack diagram............................................................................................................................................... 4
1.2 Wi-Fi features ............................................................................................................................................................. 4
2 Hardware Specifications ............................................................................................................................................ 5
2.1 Recommended Operating Conditions ........................................................................................................................ 5
2.2 Absolute Maximum Ratings ....................................................................................................................................... 5
2.3 I/O Operating Conditions............................................................................................................................................ 5
2.4 Current Consumption ................................................................................................................................................. 6
2.5 Selected RF Characteristics ...................................................................................................................................... 7
2.6 Transmit Power Back-off ............................................................................................................................................ 7
2.7 Pin Assignment .......................................................................................................................................................... 9
2.8 Pin Placement Diagram (Top View) ......................................................................................................................... 10
2.9 Layout Drawing ........................................................................................................................................................ 11
3 Hardware Design ..................................................................................................................................................... 12
3.1 Block Diagram .......................................................................................................................................................... 12
3.2 Layout....................................................................................................................................................................... 12
3.3 Module Reflow ......................................................................................................................................................... 12
3.4 GPIO Interface ......................................................................................................................................................... 12
3.5 UART Interface ........................................................................................................................................................ 13
3.6 PCB Layout Guidelines ............................................................................................................................................ 14
3.7 Reset Circuit ............................................................................................................................................................. 14
3.7.1 External Reset Circuit ............................................................................................................................................ 14
3.7.2 Internal Reset Circuit ............................................................................................................................................. 15
4 Regulatory Compliance ............................................................................................................................................ 16
4.1 Modular Approval, FCC and IC ................................................................................................................................ 17
4.2 FCC Label Instructions............................................................................................................................................. 17
4.3 CE Label Instructions ............................................................................................................................................... 17
5 Ordering Information ................................................................................................................................................ 18
6 Revision History ...................................................................................................................................................... 18