ST SN260 ZigBee网络解决方案

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[组图]ST SN260 ZigBee网络解决方案

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ST SN260 ZigBee网络解决方案

作者：ST 文章来源：本站原创点击数：更新时间：2007-8-21

ST公司的SN260是ZigBee/802.15.4兼容的网络处理器,它集成了2.4GHz IEEE 802.15.4兼容的收发器和能运行EmberZNe (ZigBee兼容的网络堆栈)的16位网络处理器(XAP2b核).SN260通过标准的SPI模块,能接入到EmberZNet API,从而允许用主处理器进行应用开发.而XAP2b微处理器是一种集成在CN260的功能优化核,包含了闪存和RAM存储器以及优化的外设组,以增强网络堆栈的运行.SN260网络处理器主要应用在建筑物自动化和控制,家庭自动化和控制,家庭娱乐控制和资产跟踪.解决方案给出了SN260的主要性能,方框图,应用电路以及所用材料清单(BOM).

SN260 ZigBeeTM/802.15.4 network processor
The SN260 integrates a 2.4GHz, IEEE 802.15.4-compliant transceiver with a 16-bit network
processor (XAP2b core) to run EmberZNet, the ZigBee-compliant network stack. The
SN260 exposes access to the EmberZNet API across a standard SPI module, allowing
application development on a Host processor. This means that the SN260 can be viewed as
a ZigBee peripheral connected over a SPI. The XAP2b microprocessor is a power-optimized
core integrated in the SN260. It contains integrated Flash and RAM memory along with an
optimized peripheral set to enhance the operation of the network stack.
The transceiver utilizes an efficient architecture that exceeds the dynamic range
requirements imposed by the IEEE 802.15.4-2003 standard by over 15dB. The integrated
receive channel filtering allows for co-existence with other communication standards in the
2.4GHz spectrum such as IEEE 802.11g 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 by a
further 3dB.
The SN260 contains embedded Flash and integrated RAM for program and data storage.
By employing an effective wear-leveling algorithm, the stack optimizes the lifetime of the
embedded Flash, and affords the application the ability to configure stack and application
tokens within the SN260.
To maintain the strict timing requirements imposed by ZigBee and the IEEE 802.15.4-2003
standard, the SN260 integrates a number of MAC functions into the hardware. The MAC
hardware handles automatic ACK transmission and reception, automatic backoff delay, and
clear channel assessment for transmission, as well as automatic filtering of received
packets. In addition, the SN260 allows for true MAC level debugging by integrating the
Packet Trace Interface.
An integrated voltage regulator, power-on-reset circuitry, sleep timer, and low-power sleep
modes are available. The deep sleep and power down modes draws less than 1 μA, allowing products to achieve long battery life.
Finally, the SN260 utilizes the non-intrusive SIF module for powerful software debugging
and programming of the network processor.
SN260的典型应用:
● Building automation and control
● Home automation and control
● Home entertainment control
● Asset tracking
主要特性:
■ Integrated 2.4GHz, IEEE 802.15.4-compliant transceiver:
– Robust RX filtering allows co-existence with IEEE 802.11g and Bluetooth devices
– - 97.5dBm RX sensitivity (1% PER, 20byte packet)
– + 3dBm nominal output power
– Increased radio performance mode (boost mode) gives – 98.5dBm sensitivity and +
5dBm transmit power
– Integrated VCO and loop filter
– Secondary TX-only RF port for applications requiring external PA.
■ Integrated IEEE 802.15.4 PHY and MAC
■ EmberZNet ZigBee-compliant stack running on the dedicated network processor
■ Controlled by the Host using the EmberZNetTM Serial Protocol (EZSP)
– Standard serial interface (allows for connection to a variety of Host micro controllers)
■ Non-intrusive debug interface (SIF)
■ Integrated hardware and software support for InSight Development Environment
■ Dedicated peripherals and integrated memory
■ Provides integrated RC oscillator for low power operation
■ Three sleep modes:
– Processor idle (automatic)
– Deep sleep—1.0μA
– Power down—1.0μA
■ Watchdog timer and power-on-reset circuitry
■ Integrated AES encryption accelerator
■ Integrated 1.8V voltage regulator
■ Compatible with EmberTM EM250

SN260的方框图:

SN260的应用电路图:

应用电路中材料清单(BOM):

详情请参阅SN260数据表:

http://www.st.com/stonline/products/literature/ds/12972/sn260.pdf

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