User's Manual

XR-31B WIFI module

Page 4 of 14

1.2 Features

◼ EEE 802.11b/g/n, 1x1 SISO 2.4GHz

◼ Built-in ARM Cortex-M4F 32bit MCU with main frequency from 32KHz to

160MHz, support RTOS

◼ Built-in 256KB SRAM and 160KB ROM

◼ Support external Flash and eXecute In Place(XIP)

◼ 8 shared universal DMA channels

◼ Built-in 6 ways 12bit SAR type A/D converter

◼ Built-in Wi-Fi MAC/ BB/RF/PA/LNA

◼ Support WEP, WPA/WPA2, WPS2.0

◼ Support UART/GPIO/ADC/PWM/I2C/SPI interface

◼ Use SMD-16 assemble model

◼ Support multiple sleep modes and current as low as 4uA in deep sleep mode

◼ Support AES/DES/3DES/SHA/MD5/CRC encryption engine

◼ Support STA/AP/STA+AP operation modes

◼ Support Smart Config/AirKiss (WeChat)

◼ Support Local firmware upgrade using UART and remote upgrade（FOTA）

◼ Has universal and friendly AT command set

◼ Support secondary development, support Windows, Linux development

environment