SN260 데이터 시트보기 (PDF) - STMicroelectronics

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SN260

ZigBee® 802.15.4 network processor

STMicroelectronics 

SN260

Top-level functional description

The SN260 integrates hardware support for a Packet Trace module, which allows robust

packet-based debug. This element is a critical component of InSight Desktop, the Ember

software IDE, providing advanced network debug capability when coupled with the InSight

Adapter.

The SN260 integrates a 16-bit XAP2b microprocessor developed by Cambridge

Consultants Ltd. This power-efficient, industry-proven core provides the appropriate level of

processing power to meet the needs of the EmberZNet Zigbee-compliant stack,

EmberZNet. In addition, the SIF module provides a non-intrusive programming and debug

interface allowing for real-time application debugging.

The SN260 exposes the EmberZNet Serial API over the SPI, which allows application

development to occur on a Host micro controller of choice. In addition to the four SPI

signals, two additional signals, nHOST_INT and nWAKE, provide an easy-to-use

handshake mechanism between the Host and the SN260.

The integrated voltage regulator generates a regulated 1.8V reference voltage from an

unregulated supply voltage. This voltage is decoupled and routed externally to supply the

1.8V to the core logic. In addition, an integrated POR module allows for the proper cold start

of the SN260.

The SN260 contains one high-frequency (24MHz) crystal oscillator and, for low-power

operation, a second low-frequency internal 10 kHz oscillator.

The SN260 contains two power domains. The always-powered high voltage supply is used

for powering the GPIO pads and critical chip functions. The rest of the chip is powered by a

regulated Low Voltage Supply which can be disabled during deep sleep to reduce the power

consumption.

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