XR-21A WiFi Module

Xr-21a WiFi module is developed to meet a wide range of Internet of things product applications. The core processor xr808 of the module integrates arm cortex-m4f 32-bit microcontroller in small size, supports the master clock frequency from 32kHz to 160MHz, integrates high-performance WLAN system, including Wi Fi MAC / BB / RF / PA / LNA unit, and integrates advanced power supply tube It supports ultra-low power consumption, multiple sleep modes and fast wake-up mechanisms; integrates hardware encryption engine, supports AES / DES / 3DES / Sha / MD5 / CRC encryption methods; integrates large on-chip memory and rich peripheral resources. Xr-21a WiFi module supports standard IEEE802.11 B / g / N protocol, RTOS and complete TCP / IP protocol stack.

Users can use the module to add networking functions to existing devices, or use it as the main controller to design wireless network products. Xr808 can be started directly from external flash memory. The built-in cache memory can improve system performance and reduce memory requirements.

Picture keywords

1.2 characteristics

◼  IEEE 802.11b/g/n, 1x1 SISO 2.4GHz

◼  Built in arm cortex-m4f 32-bit micro MCU, main frequency support from 32kHz to 160MHz, support RTOS

◼  Built in 256Kb SRAM and 160kb ROM

◼  Support external flash and execute in place (XIP) mode

◼  8-channel shared universal DMA channel

◼  Built in 6-channel 12 bit resolution and 10 bit effective SAR A / D converter, including 5 common channels and 1 Vbat voltage detection channel

◼  Integrated Wi Fi MAC / BB / RF / PA / LNA

◼  Support WEP, WPA / WPA2, wps2.0

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

◼  Smd-16 package is adopted

◼  Support a variety of sleep modes, deep sleep current as low as 4ua

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

◼  Support STA / AP / sta + AP working mode

◼  Support smart config / airkiss (wechat) one click distribution network ◼  Support serial port local upgrade and remote firmware upgrade (FOTA)

◼  General at command can be used quickly

◼  It supports secondary development and integrates windows and Linux development environment