EM250-RCM-R Ember, EM250-RCM-R Datasheet - Page 2

• Manufacturer Part Number: EM250-RCM-R
• Description: EM250 RCM BOARD
• Manufacturer: Ember
• Type: Transceiver, 802.15.4/ZigBeer

Specifications of EM250-RCM-R

• Frequency: 2.4GHz
• For Use With/related Products: EM250
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 636-1023

EM250
General Description
120-0082-000S
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 inte-
grated 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 XAP2b microprocessor is a power-optimized core integrated in the EM250. It supports two different modes
of operation—System Mode and Application Mode. The EmberZNet stack runs in System Mode with full access
to all areas of the chip. Application code runs in Application Mode with limited access to the EM250 resources;
this allows for the scheduling of events by the application developer while preventing modification of re-
stricted areas of memory and registers. This architecture results in increased stability and reliability of de-
ployed solutions.
The EM250 has 128kB of embedded Flash memory and 5kB of integrated RAM for data and program storage.
The EM250 software stack employs an effective wear-leveling algorithm in order to optimize the lifetime of
the embedded Flash.
To maintain the strict timing requirements imposed by ZigBee and the IEEE 802.15.4-2003 standard, the EM250
integrates a number of MAC functions into the hardware. The MAC hardware handles automatic ACK transmis-
sion and reception, automatic backoff delay, and clear channel assessment for transmission, as well as auto-
matic filtering of received packets. In addition, the EM250 allows for true MAC level debugging by integrating
the Packet Trace Interface.
To support user-defined applications, a number of peripherals such as GPIO, UART, SPI, I
purpose timers are integrated. Also, an integrated voltage regulator, power-on-reset circuitry, sleep timer,
and low-power sleep modes are available. The deep sleep mode draws less than 1μA, allowing products to
achieve long battery life.
Finally, the EM250 utilizes the non-intrusive SIF module for powerful software debugging and programming of
the XAP2b microcontroller.
Target applications for the EM250 include:
The EM250 is purchased with EmberZNet, the Ember ZigBee-compliant software stack, providing a ZigBee pro-
file-ready, platform-compliant solution. This technical datasheet details the EM250 features available to cus-
tomers using it with the EmberZNet stack.
Building automation and control
Home automation and control
Home entertainment control
Asset tracking
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