USR IOT USR-WIFI232-A2 Hardware Manual Download

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USR-WIFI232-

2 Hardware Manual

Jinan USR IOT Technology Limited 5 / 9

2. Hardware Design

2.1.

Typical Connection

2.2.

Power Interface

USR-WIFI232-

2 adopt single-voltage 3.3 V power supply. Peak current is about 350mA, work current is

about 200mA and sleep mode current is 100mA.

The power filter is recommended to be used near the connector of the user board, and it is recommended to

use two parallel decoupling capacitors with 100uF and 10uF to improve the stability of the system and

wireless performance.

2.3.

UART Interface

UART is serial data interface that can connect the RS-232 chip and transfer to the RS-232 level. UART

interface includes TXD/RXD/RTS/CTS.Take the RS-232 level as a reference circuit diagram as follows:

Summary of Contents for USR-WIFI232-A2

Page 1: ...USR WIFI232 A2 Hardware Manual www usriot com Jinan USR IOT Technology Limited 1 9 h usriot com USR WIFI232 A2 Hardware Manual File version 1 0 0...

Page 2: ...3 1 1 Dimension 3 1 2 Encapsulation 3 1 3 Pin Defination 4 2 Hardware Design 5 2 1 Typical Connection 5 2 2 Power Interface 5 2 3 UART Interface 5 2 4 10 100M Ethernet Interface 6 2 4 1 Ethernet Inte...

Page 3: ...com Jinan USR IOT Technology Limited 3 9 h usriot com 1 Product Overview 1 1 Dimension Module dimension diagram as follows 1 2 Encapsulation You can download PCB library from http www usriot com pcb...

Page 4: ...4 UART_RXD I GPIO4 I O 5 UART_RTS O GPIO5 I O 6 UART_CTS I GPIO6 I O 7 RESET I Take effect in low level 8 nLink O Output high level WIFI connection available Output low level WIFI connection not avail...

Page 5: ...leep mode current is 100mA The power filter is recommended to be used near the connector of the user board and it is recommended to use two parallel decoupling capacitors with 100uF and 10uF to improv...

Page 6: ...f MCU and RXD of module to TXD of MCU When communicate to MCU with 5V switching circuit is necessary Switching circuit diagram as follows 2 4 10 100M Ethernet Interface 2 4 1 Ethernet Interface with T...

Page 7: ...can t be saved Circuit diagram as follows Note VCC signal at reference design shall base on user board PHY chipset voltage level such as 2 5V power supply for general Ethernet PHY chipset USR WIFI232...

Page 8: ...chip dose not support direct cross self adaption 3 PHY chip on board should better to be forced into 100M work mode 2 5 Reset and Reload nReload nReload pin can connect to external button or configur...

Page 9: ...om 4 Disclaimer This document provide the information of USR WIFI232 B2 products it hasn t been granted any intellectual property license by forbidding speak or other ways either explicitly or implici...