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UM960eb & UM960Leb User Manual

UC-08-M34 EN R1.0

Antenna Circuit

11

4

Antenna Circuit

4.1

Antenna Short Protection Circuit

The antenna short protection circuit consists of a load management chip and peripheral

circuits. 5 V DC/DC circuit output feeds the antenna via the chip. When the antenna

current is larger than 100 mA, the circuit triggers a short protection and FLAGB gives a

low level indication.

After removing R60 and R50, the antenna short protection circuit is bypassed. You can

choose VCC_RF or 5 V DC/DC circuit output to feed the antenna by soldering R52 or

R51. But it is not recommended to use VCC_RF to feed as it just provides 3.3 V voltage

and it is not optimized for the anti-lightning strike and anti-surge due to the compact

size of the module.

U4

FPF2004

Figure 4-1 Antenna Short Protection Circuit

Figure 4-2 Antenna Short Protection Circuit on the Bottom of EB

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Содержание UM960eb

Страница 1: ...WWW UNICORECOMM COM Copyright 2009 2023 Unicore Communications Inc Data subject to change without notice UM960eb UM960Leb Evaluation Board HARDWARE USER MANUAL...

Страница 2: ...UM960eb UM960Leb User Manual i Revision History Version Revision History Date R1 0 First release Nov 2023...

Страница 3: ...mplied by estoppel or any other form the granting or transferring of Unicore rights and or interests including but not limited to the aforementioned trademark rights in whole or in part Disclaimer The...

Страница 4: ...Foreword This manual provides information on the hardware composition and design of the UM960 series evaluation board UM960eb and UM960Leb Target Readers This document is written for technicians who...

Страница 5: ...6 3 1 3 3 V LDO POWER SUPPLY 7 3 2 5 V DC DC POWER SUPPLY 8 3 3 BACKUP POWER SUPPLY 9 4 Antenna Circuit 11 4 1 ANTENNA SHORT PROTECTION CIRCUIT 11 4 2 ANTENNA FEED CIRCUIT 12 5 LED Indicators 13 6 UM9...

Страница 6: ...ort protection circuit and peripheral interfaces The schematics of the evaluation board can be used as the reference design for the UM960 and UM960L Figure 1 1 to Figure 1 3 take UM960eb as an example...

Страница 7: ...around are used to mount the UM960 socket The printing adopts exposed copper to ensure the flatness of the surface 2 UM960 module The pin pads are designed long which is convenient for soldering testi...

Страница 8: ...3 Bottom View of UM960eb 1 Ports used to connect jumpers 2 Anti static design and heat dissipation with exposed copper 3 Debug ports 4 VCC power supply and LDO circuit 5 Dual row pins as external int...

Страница 9: ...eb Interface Table 2 1 UM960eb UM960Leb Pin Description No Pin Name I O Description 1 NC No connection inside 2 NC No connection inside 3 NC No connection inside 4 NC No connection inside 5 LNA_PWR I...

Страница 10: ...Ground 21 RTK_STAT LAN_EN RSV O Corresponding to pin14 of UM960 UM960L see Table 6 1 for more details 22 GND Ground 23 PPS O PPS output 24 NC No connection inside 25 NC No connection inside 26 NC No...

Страница 11: ...N pin passing through a circuit with surge protection and filter capacitors to provide power for the 3 3 V LDO circuit and 5 V DC DC boost circuit The input range of VIN is 3 2V to 5V FC1 NFM21PC104R1...

Страница 12: ...e rated output current of LDO should be more than twice the current of the module R20 is a series resistor placed at the input of the LDO which is used for debugging When selecting the resistor choose...

Страница 13: ...ard to feed the antenna according to the antenna type R30 and R45 are series resistors connected to the DC DC circuit at the input and output which are used for debugging When selecting the resistors...

Страница 14: ...T FL11E Nominal Voltage 3V Nominal Capacity 3 0mAh BT1 MS621T FL11E Figure 3 5 Backup Power Circuit Figure 3 6 Backup Power Circuit on the Bottom of EB Note When the backup battery supplies power to V...

Страница 15: ...ng time the power of the battery may be low and the hot start test may fail Therefore it is recommended to charge the board as long as possible before testing the hot start function 1 Use a multimeter...

Страница 16: ...rs a short protection and FLAGB gives a low level indication After removing R60 and R50 the antenna short protection circuit is bypassed You can choose VCC_RF or 5 V DC DC circuit output to feed the a...

Страница 17: ...is not recommended to use VCC_RF to feed as it just provides 3 3 V voltage and it is not optimized for the anti lightning strike and anti surge due to the compact size of the module The ESD protection...

Страница 18: ...n of the LED Status LED Indicator Color Description Power 5V or 3 3V Green Light on when the power is normal Reset Red Light on when pressing the reset button Antenna Red Light on when antenna is shor...

Страница 19: ...he module only R22 is a large size resistor with high rated power to ensure the current capability In the figure below a 0805 resistor is used Removing R22 connecting a power supply wire at TP1 and a...

Страница 20: ...Module Pin14 Description UM960 RTK_STAT LNA_EN RTK_STAT High level RTK Fix Low level RTK No Fix LAN_EN High level enable external LNA Low level disable external LNA Note The pin function is configured...

Страница 21: ...16 UM960 Series Peripheral Design UC 08 M34 EN R1 0 0805 U1A UM960 Figure 6 1 UM960 Peripheral Design...

Страница 22: ...measurement Figure 6 2 UM960 Peripheral Circuit The GND pads at the bottom of the module should be grounded to ensure heat dissipation The evaluation board has copper exposed on the bottom of the mod...

Страница 23: ...d TP8 can be used to debug I2 C J1 is used for MMCX connection After soldering the MMCX connector it can be used to measure the PPS signals J2 J3 J6 and J7 are debug ports Connect the signal that need...

Страница 24: ...arranged in order to identify the function of each port Figure 7 2 Through Hole Test Points Appendix The schematics of UM960 and UM960L are almost the same except the peripheral design of pin14 see C...

Страница 25: ...1E Nominal Voltage 3V Nominal Capacity 3 0mAh Title Size Document Number Rev Date Sheet of UM960eb Title Size Document Number Rev Date Sheet of UM960eb Title Size Document Number Rev Date Sheet of UM9...

Страница 26: ...Operating Voltage 1 8V 5 5V Vin 3 3V Vout 3 0V Current Limit Min 100mA Current Limit Typ 150mA Current Limit Max 200mA When Current 100 200mA FLAGB 1 b0 Title Size Document Number Rev Date Sheet of U...

Страница 27: ...22 Appendix UC 08 M34 EN R1 0 Assembly Top of UM960eb...

Страница 28: ...UM960eb UM960Leb User Manual UC 08 M34 EN R1 0 Appendix 23 Assembly Bottom of UM960eb...

Страница 29: ...Unicore Communications Inc 7 F3 No 7 Fengxian East Road Haidian Beijing P R China 100094 www unicorecomm com Phone 86 10 69939800 Fax 86 10 69939888 info unicorecomm com www unicorecomm com...

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