Computime Limited

The CT-EM250 SoC RF Transceiver Modules is a compact surface mounted module specially designed for Ember’s ZigBee™ protocol stack for wireless networks, EmberZNet, based on IEEE 802.15.4 standard in the 2.4GHz worldwide ISM band. It provides 16 channels and compliant PHY and MAC layers. The complete module is only 20.32 x 25.52 x 3 mm (integrated antenna version) and 20.32 x 19.53 x 3 mm (external antenna version). They both integrate a 2.4GHz, IEEE 802.15.4-compliant transceiver with a 16-bit XAP2b microprocessor. They consist of integrated Flash and RAM memory and peripherals. A number of peripherals such as GPIO, UART, SPI, I2C, ADC, and general-purpose timers are integrated to support user-defined applications.

The CT-EM250 provides a fast jumpstart design for system integrators or electronic designers wishing to use ZigBee wireless technologies. The module contains qualified RF hardware and enough processor power to run the EmberZNet stack or other ZigBee network stack (depending on version), making it a powerful platform for building wireless networking products. ZigBee Coordinators (ZC), ZigBee Routers (ZR), and ZigBee End Devices (ZED) are all supported and are programmed onto the module together with a custom application. Minimal RF design experience is need to use CT-EM250 modules.

Features

Complete ZigBee-ready module with or without integrated antenna
IEEE 802.15.4 compliant PHY and MAC layer
12MHz XAP2b 16-bit microcontroller core
128kB Flash and 5kB RAM, emulation EEPROM
17 GPIO , 4 channel 12 bit ADC
UART, SPI, I2C and debug interfaces
External 32.768 kHz real time clock or internal RC oscillator for timer
High performance direct sequence spread spectrum (DSSS) RF transceiver
16 channels in the 2.4 GHz ISM band
on-chip regulator for 2.1-3.6V operation , two sleep low power modes

Circuit Description

The module contains an IEEE 802.15.4 compliant SoC RF transceiver, internal memory, high speed oscillator, RC oscillator and an external 32 kHz oscillator. The module is intended to run the EmberZNet ZigBee software or other ZigBee network implementation, depending on the specific version.

The application software together with the ZigBee protocol software stack can be programmed in Flash memory through the SIF module, using an evaluation board from Ember InSight Desktop.

To support user-defined applications, a number of peripherals such as GPIO, UART, SPI, I2C, ADC, and general-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.

For further details on the SoC transceiver (Ember EM250), please consult the data sheet at http://www.ember.com

For ordering information please send enquiries to zigbee@computime.com