Single-Chip ZigBee/802.15.4 Solution

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The EM250 is a single-chip solution that integrates a 2.4GHz, IEEE 802.15.4-compliant transceiver with a 16-bit XAP2b microprocessor. It contains integrated Flash and RAM memory and peripherals of use to designers of ZigBee-based applications.

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.

Symmetry Electronics is an authorized Silicon Labs distributor.


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? Integrated 2.4GHz, IEEE 802.15.4-compliant transceiver:
Robust RX filtering allows co-existence with IEEE 802.11g and Bluetooth devices
- 99dBm RX sensitivity (1% PER, 20byte packet)
+ 3dBm nominal output power
Increased radio performance mode (boost mode) gives - 100dBm sensitivity and + 5dBm transmit power
Integrated VCO and loop filter
? Integrated IEEE 802.15.4 PHY and lower MAC with DMA
? Integrated hardware support for Packet Trace Interface for the Ember development environment
? Provides integrated RC oscillator for low power operation
? Supports optional 32.768kHz crystal oscillator for higher accuracy needs
? 16-bit XAP 2b microprocessor
? Integrated memory:
128kB of Flash
5kB of SRAM
? Configurable memory protection scheme
? Two sleep modes:
Processor idle
Deep sleep1.0A (1.5A with optional 32.768kHz oscillator enabled)
? Seventeen GPIO pins with alternate functions
? Two Serial Controllers with DMA
SC1: IC master, SPI master + UART
SC2: IC master, SPI master/slave
? Two 16-bit general-purpose timers; one 16-bit sleep timer
? Watchdog timer and power-on-reset circuitry
? Non-intrusive debug interface (SIF)
? Integrated AES encryption accelerator
? Integrated ADC module first-order, sigma-delta converter with 12-bit resolution
? Integrated 1.8V voltage regulator


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Silicon Labs Datasheet

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