Ember EM35x和RF6525的ZigBee参考设计方案

Ember公司的EM351/EM357是高性能的系统级芯片(SoC),集成了2.4 GHz与IEEE 802.15.4-2003兼容的收发器,32位ARM® Cortex™-M3微处理器,128KB或192KB闪存和12KB RAM存储器以及用于ZigBee系统的外设.处理器的工作频率6, 12或24 MHz, RF接收器灵敏度-100dBm(可配置到-102dBm),输出功率+3dBm(可配置到+8dBm),与WiFi和蓝牙共存,主要用在智能电网,建筑物与家庭自动化和控制,安全和监视,通用ZigBee无线传感器网络.本文介绍了EM351/EM357主要特性,方框图,典型应用电路与相应材料清单以及EM35x和RFMD RF6525/RF6515前端模块(FEM)参考设计电路图,材料清单.
EM351/EM357:High-Performance, Integrated ZigBee/802.15.4 System-on-Chip
The EM351 and EM357 are fully integrated System-on-Chips that integrate a 2.4 GHz, IEEE 802.15.4-2003-compliant transceiver, 32-bit ARM® Cortex™-M3 microprocessor, flash and RAM memory, and peripherals of use to designers of ZigBee-based systems.
The transceiver uses an efficient architecture that exceeds the dynamic range requirements imposed by the IEEE 802.15.4-2003 standard by over 15 dB. The integrated receive channel filtering allows for robust co-existence with other communication standards in the 2.4 GHz spectrum, such as IEEE 802.11-2007 and Bluetooth. The integrated regulator, VCO, loop filter, and power amplifier keep the external component count low. An optional high performance radio mode (boost mode) is software-selectable to boost dynamic range.
The integrated 32-bit ARM® Cortex™-M3 microprocessor is highly optimized for high performance, low power consumption, and efficient memory utilization. Including an integrated MPU, it supports two different modes of operation—privileged mode and user mode. This architecture could allow for separation of the networking stack from the application code, and prevents unwanted modification of restricted areas of memory and registers resulting in increased stability and reliability of deployed solutions.
The EM351 has 128 kB of embedded flash memory and the EM357 has 192 kB of embedded flash memory. B...