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CT-EM250 ZigBee-Ready RF Transceiver Modules

ZigBee- Ready SoC RF Transceiver Modules

Table of Content

General Description…………………………………………………………………………2

Applications…………………………………………………………………………………..2

Features………………………………………………………………………………………2

Absolute Maximum Ratings………………………………………………………………...3

Recommended Operating Conditions……………………………………………………..3

Electrical Specifications……………………………………………………………………..3

Introduction…………………………………………………………………………………...5

Typical Application Block…………………………………………………………………....5

Pin Assignment……………………………………………………………………………….6

Block Diagram………………………………………………………………………………..8

Circuit Description……………………………………………………………………………8

SIF Module Programming and Debug Interface………………………………………….9

Power Management…………………………………………………………………………9

RF Frequency, Output Power Levels and Data Rates…………………………………10

Antenna Design Considerations…………………………………………………………..11

PCB Layout Recommendations…………………………………………………………..13

FCC Approvals……………………………………………………………………………...13

FCC statement………………………………… ………………………………………….14

Operating description………………………………………………………………………14

Mechanical Dimensions……………………………………………………………………15

Ordering Information……………………………………………………………………….15

Document Revision History………………………………………………………………..15

Summary of content (15 pages)

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CT-EM250 ZigBee-Ready RF Transceiver Modules ZigBee- Ready SoC RF Transceiver Modules Table of Content General Description…………………………………………………………………………2 Applications…………………………………………………………………………………..2 Features………………………………………………………………………………………2 Absolute Maximum Ratings………………………………………………………………...3 Recommended Operating Conditions……………………………………………………..3 Electrical Specifications……………………………………………………………………..3 Introduction…………………………………………………………………………………...5 Typical Application Block…………………………………………………………………....
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CT-EM250 ZigBee-Ready RF Transceiver Modules ZigBee- Ready SoC RF Transceiver Modules General Description 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 world-wide 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.
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CT-EM250 ZigBee-Ready RF Transceiver Modules Absolute Maximum Ratings Parameter Test Conditions Min. Max. Unit Regulator voltage (VDD_PADS) - 0.3 3.6 V Voltage on any GPIO[16:0], SIF_CLK, - 0.3 VDD_PADS+ V 0.3 SIF_MISO, SIF_MOSI, nSIF_LOAD, OSC32A, OSC32B, nRESET, Storage temperature - 40 + 140 °C Under no circumstances should the absolute maximum ratings given above be violated. Stress exceeding one or more of the limiting values may cause permanent damage to the device.
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CT-EM250 ZigBee-Ready RF Transceiver Modules Parameter Min. Typ. Max Unit Spurious emission, Complies with EN 300 328, EN TX 30 – 1000 MHz TBD 1-12.75 GHz TBD 1.8-1.9 GHz TBD 5.15-5.3 GHz TBD Sensitivity dBm 300 440, FCC CRF47 Part 15 and ARIB STD-T66 -98 dBm 35/35 dB 40/40 dB Adjacent channel rejection PER = 1% Boost Mode IEEE 802.15.4 signal at - 82dBm +/-5 MHz Adjacent channel rejection IEEE 802.15.4 signal at - 82dBm +/-10 MHz Co-channel rejection IEEE 802.15.
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CT-EM250 ZigBee-Ready RF Transceiver Modules Introduction The CT-EM250 series of modules are specially designed for ZigBee application. They provide a fast jump start 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.
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CT-EM250 ZigBee-Ready RF Transceiver Modules Pin Description Pin# Signal Direction Description 1 SIF_MISO O Serial interface, master in/slave out 2 SIF_MOSI I Serial interface, master out/slave in 3 SIF_LOADB I/O Serial interface, load strobe (open-collector with internal pull-up) 4 GND Ground Ground supply 5 GPIO16 I/O Digital I/O Enable GPIO16 with GPIO_CFG[3] 6 GPIO15 I/O Digital I/O Enable GPIO15 with GPIO_CFG[2] 7 GPIO14 I/O Digital I/O Enable GPIO14 with GPIO_CFG[1] 8
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CT-EM250 ZigBee-Ready RF Transceiver Modules Enable GPIO2 with GPIO_CFG[7:4] 22 GPIO3 I/O Digital I/O Enable GPIO3 with GPIO_CFG[7:4] 23 GPIO4 I/O Digital I/O Enable GPIO4 with GPIO_CFG[12] and GPIO_CFG[8] 24 GPIO5 I/O Digital I/O Enable GPIO5 with GPIO_CFG[12] and GPIO_CFG[9] 25 GPIO6 I/O Digital I/O Enable GPIO6 with GPIO_CFG[10] 26 GPIO7 I/O Digital I/O Enable GPIO7 with GPIO_CFG[13] and GPIO_CFG[11] 27 GPIO8 I/O Digital I/O Enable GPIO8 with GPIO_CFG[14] 28 TXD O UART transmit
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CT-EM250 ZigBee-Ready RF Transceiver Modules Block Diagram 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.
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CT-EM250 ZigBee-Ready RF Transceiver Modules SIF Module Programming and Debug Interface SIF is a synchronous serial interface developed by Cambridge Consultants Ltd. It is the primary programming and debug interface of the CT-EM250. The SIF module allows external devices to read and write memory-mapped registers in real-time without changing the functionality or timing of the XAP2b core.
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CT-EM250 ZigBee-Ready RF Transceiver Modules RF Frequency, Output Power Levels and Data Rates The following table shows the RF channels as defined by the IEEE 802.15.4 The output power level can be configured in the range -32 to 5 dBm. The RF transceiver uses direct sequence spread spectrum (DSSS) with a raw data rate of 250 kbit/s. The modulation format is Offset – Quadrature Phase Shift Keying (O-QPSK).
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CT-EM250 ZigBee-Ready RF Transceiver Modules Antenna Design Considerations CT-EM250 provides an integrated antenna. The design should be effective for many applications requiring a compact solution containing all the critical RF parts within the module. Applications requiring better range may consider an external antenna or possibly even an external booster circuit (power amplifier). The range testing using the integrated antenna shows a typical distance of 100 m outdoor line-of-sight (LOS).
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CT-EM250 ZigBee-Ready RF Transceiver Modules The antenna should be kept away (> 10mm) from metallic or other conductive and dielectric materials, and should never be used inside a metallic enclosure. Compared to lower frequencies, operation at 2.4GHz usually has a shorter LOS. However, the ZigBee mesh network topology provides a more flexible and reliable network topology to end users. The farther end device can easily be reached over a mesh network through other full function (routing) devices.
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CT-EM250 ZigBee-Ready RF Transceiver Modules PCB Layout Recommendations For recommended layout pads for the module, please reference Mechanical Dimensions. The area underneath the module should be covered with solder resist in order to prevent short circuiting the test pads on the back side of the module. A solid ground plane is preferred. Unconnected pins should be soldered to the pads, and the pads should be left floating.
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CT-EM250 ZigBee-Ready RF Transceiver Modules normally be required to obtain FCC authorization, this does not preclude the possibility that some other form of authorization or testing may be required for the finished device. When the CT-EM2503 module is integrated inside another device/product, then the outside surface of that device/product must display a label referring to the enclosed module.
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CT-EM250 ZigBee-Ready RF Transceiver Modules Mechanical Dimensions CT-EM2500 CT-EM2501/2/3 Figure 4 Mechanical Dimensions of CT-EM2500 and CT-EM2501 modules Ordering Information Ordering Number Part Description CT-EM2500 ZigBee-ready RF module, 128 KB Flash , external antenna CT-EM2501 ZigBee-ready RF module, 128 KB Flash, integrated antenna CT-EM2502 ZigBee-ready RF module, 128 KB Flash, integrated meander line antenna CT-EM2503 ZigBee-ready RF module, 128 KB Flash, integrated antenna FCC app