XR-51A Offine voice+WiFi

Xr-51a WiFi module is developed for low-cost wireless speech recognition applications. The module is composed of core processor xr872et, audio power amplifier and other peripheral circuits. Xr872et integrates arm cortex-m4f MCU with operating frequency of 240mhz in small size package; integrates high-performance WLAN system, including Wi Fi MAC / BB / RF / PA / LNA unit; integrates audio subsystem with high sampling rate and extremely low noise; integrates high-resolution image acquisition subsystem and supports hardware JPEG Image coding; integration of advanced power management unit, support ultra-low power consumption, with a variety of sleep modes and fast wake-up mechanism; integration of hardware encryption engine, support AES / DES / 3DES / Sha / MD5 / CRC and other encryption methods; integration of rich peripheral interfaces, such as SDIO, Twi, CSI, UART, PWM, CIR (T / R), SPI, ADC, etc. Xr-51a WiFi module supports standard IEEE802.11 B / g / N protocol and has complete TCP / IP protocol stack.

Users can use this module to add networking functions to existing devices, or they can use it to build independent network controllers. When carrying the application and acting as the only application processor in the device, it can boot directly from the external flash memory. The built-in cache memory can improve system performance and reduce memory requirements.

1.2 characteristics

◼  Support IEEE 802.11b/g/n, 1x1 SISO 2.4GHz

◼  Embedded arm cortex-m4f 32-bit micro MCU, main frequency 240mhz

◼  Built in 416kb SRAM and 160kb ROM

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

◼  Built in eFuse with 1024 bits

◼  8-channel shared universal DMA channel

◼  Built in 3-channel 12 bit resolution and 10 bit effective SAR A / D converter, including 2 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 / SDIO interface

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

◼  Support STA / AP / sta + AP working mode

◼  Support smart config / airkiss (wechat) one button distribution network function

◼  Support firmware serial port local upgrade and remote upgrade (FOTA)

◼  General at command can be used quickly

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

◼  On board audio power amplifier circuit, support single electret microphone, can be connected with 4 Europe 0.5W ~ 3W horn according to the demand