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4. Mechanical Details

The BRD4305E Radio Board is illustrated in the figures below.

20 mm

UFL

Connector

33 mm

RF Output

Selection

OTA

Flash

xGM13S

37.5 mm

XTAL

40 mm

Figure 4.1. BRD4305E Top View

24 mm

27.3 mm

28.6 mm

5 mm

Interface

Connector

Interface

Connector

Board

Identification

20 mm

Figure 4.2. BRD4305E Bottom View

BRD4305E Reference Manual

Mechanical Details

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Summary of Contents for BRD4305E

Page 1: ...ory 512 kB RAM 64 kB Operation frequency 2 4 GHz Transmit power 18 dBm Integrated chip antenna RF matching network HF crystal and decoupling Option for UFL connector Crystal for LFXO 32 768 kHz 8 Mbit low power serial flash for over the air updates The BRD4305E Mighty Gecko Radio Board plugs into the Wireless Starter Kit Main board which is included with the Mighty Gecko Starter Kit and gives acce...

Page 2: ...ons for 2 4 GHz 8 5 2 1 ETSI EN 300 328 Emission Limits for the 2400 2483 5 MHz Band 8 5 2 2 FCC15 247 Emission Limits for the 2400 2483 5 MHz Band 8 5 2 3 Applied Emission Limits for the 2 4 GHz Band 8 6 RF Performance 9 6 1 Conducted Power Measurements 9 6 1 1 Conducted Measurements in the 2 4 GHz Band 9 6 2 Radiated Power Measurements 10 6 2 1 Radiated Measurements in the 2 4 GHz Band 10 7 EMC ...

Page 3: ...4305E Radio Board is designed to operate in the 2400 2483 5 MHz with the maximum of 18 dBm output power To develop and or evaluate the MGM13S12 module the BRD4305E Radio Board can be connected to the Wireless Starter Kit Main board to get access to display buttons and additional features from expansion boards EXP boards BRD4305E Reference Manual Introduction silabs com Building a more connected wo...

Page 4: ...E F3 PF3 DEBUG TDI F1 PF0 DEBUG TCK_SWCLK P45 NC P43 NC P41 NC P39 NC P37 PD9 SENSOR_ENABLE F11 PF5 UIF_LED1 F13 PF7 UIF_BUTTON1 F15 PC8 DISP_SCLK F17 PD14 DISP_SCS F19 PB13 PTI SYNC F21 PB11 PTI CLK GND VMCU_IN VCOM CTS_SCLK PA2 P0 P201 Lower Row VCOM RTS_ CS PA3 P2 PD10 P4 PD11 P6 GND VRF_IN P35 PD15 DISP_ENABLE P7 PC9 P5 PC8 DISP_SCLK P3 PC7 P1 PC6 DISP_SI P33 PD14 DISP_SCS P31 PD13 DISP_EXTCOM...

Page 5: ...information on the MGM13S12F512GA refer to the MGM13S data sheet 3 3 2 LF Crystal Oscillator LFXO The BRD4305E Radio Board has a 32 768 kHz crystal mounted For details regarding the crystal configuration refer to Application Note AN0016 1 Oscillator Design Considerations 3 3 3 UFL Connector To be able to perform conducted measurements Silicon Labs added a UFL connector to the Radio Board The conne...

Page 6: ...s 3 3 5 Serial Flash The BRD4305E Radio Board is equipped with an 8 Mbit Macronix MX25R SPI flash that is connected directly to the MGM13S12 to support over the air OTA updates For additional information on the pin mapping see the BRD4305E schematic 3 3 6 Serial EEPROM The BRD4305E Radio Board is equipped with a serial I2C EEPROM for board identification and to store additional board related infor...

Page 7: ...F Output Selection OTA Flash xGM13S 37 5 mm LF XTAL 40 mm Figure 4 1 BRD4305E Top View 24 mm 27 3 mm 28 6 mm 5 mm Interface Connector Interface Connector Board Identification 20 mm Figure 4 2 BRD4305E Bottom View BRD4305E Reference Manual Mechanical Details silabs com Building a more connected world Rev 1 0 7 ...

Page 8: ...onally for spurious frequencies above 1 GHz FCC 15 35 allows duty cycle relaxation to the regulatory limits For the EmberZNet PRO the relaxation is 3 6 dB Therefore the 41 2 dBm limit can be modified to 37 6 dBm If operating in the 2400 2483 5 MHz band the 2nd 3rd and 5th harmonics can fall into restricted bands As a result for those harmon ics the 37 6 dBm limit should be applied For the 4th harm...

Page 9: ... sche matic of the BRD4305E The transceiver was operated in continuous carrier transmission mode The output power of the radio was set to 18 dBm The typical output spectrum is shown in the following figure Figure 6 1 Typical Output Spectrum of the BRD4305E As shown in the figure the fundamental is just a bit under 18 dBm and all of the unwanted emissions are under the 37 6 dBm applied limit Note T...

Page 10: ...in the 2 4 GHz Band The supply for the module VDD was 3 3 V provided by the mainboard for details see the BRD4305E schematic The transceiver was operated in continuous carrier transmission mode The output power of the radio was set to 18 dBm based on the conducted measure ment The fundamental was set to the frequency where the maximum antenna gain was measured The results are shown in the table be...

Page 11: ... and radiated measurements The harmonic emissions are under the 30 dBm limit with large margin 7 2 Recommendations for 2 4 GHz FCC 15 247 Compliance As shown in the previous section the power of the fundamental frequency of the BRD4305E Mighty Gecko Radio Board with 18 dBm output is compliant with the 30 dBm limit of the FCC 15 247 regulation The harmonic emissions are under the 37 6 dBm applied l...

Page 12: ...and footprint Pin 1V8 to WSTK pad conn option A00 Initial revision Note The silkscreen marking on the board e g PCBxxxx A00 denotes the revision of the PCB The revision of the actual Radio Board is laser printed in the Board Info field on the PCB Also it can be read from the on board EEPROM BRD4305E Reference Manual Board Revision History silabs com Building a more connected world Rev 1 0 12 ...

Page 13: ...9 Errata There are no known errata at present BRD4305E Reference Manual Errata silabs com Building a more connected world Rev 1 0 13 ...

Page 14: ...10 Document Revision History Revision 1 00 July 2018 Initial document revision BRD4305E Reference Manual Document Revision History silabs com Building a more connected world Rev 1 0 14 ...

Page 15: ... or express copyright licenses granted hereunder to design or fabricate any integrated circuits The products are not designed or authorized to be used within any Life Support System without the specific written consent of Silicon Labs A Life Support System is any product or system intended to support or sustain life and or health which if it fails can be reasonably expected to result in significan...

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