Related Manuals for unicore UT986
Summary of Contents for unicore UT986
- Page 1 用户手册 HARDWARE USER MANUAL WWW.UNICORECOMM.COM UT986 Evaluation Board (UT986eb) Copyright© 2009-2023, Unicore Communications, Inc. Data subject to change without notice.
- Page 2 UT986 Evaluation Board User Manual Revision History Version Revision History Date P1.0.0 Draft 2023.01...
- Page 3 This manual does not represent, and in any case, shall not be construed as a commitments or warranty on the part of Unicore with respect to the fitness for a particular purpose/use, the accuracy, reliability and correctness of the information contained herein.
- Page 4 UT986 Evaluation Board User Manual Foreword This manual provides information on the hardware composition and design of the UT986 evaluation board (UT986eb). Target Readers This document is written for technicians who are familiar with GNSS receivers.
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Page 5: Table Of Contents
5 V DC/DC Power Supply ....................8 Backup Power Supply ...................... 8 Antenna Circuit ..................10 Antenna Short Protection Circuit ................. 10 Antenna Feed Circuit ....................11 LED Indicators ..................12 UT986 Series Peripheral Design ............13 Debug Support ..................16 Appendix ....................17... -
Page 6: Product Overview
UT986 Evaluation Board User Manual 1 Product Overview UT986eb is the evaluation board (EB) of UT986. It consists of the module UT986, a 3.3V low dropout regulator (LDO), a 5V DC/DC boost circuit, an antenna short protection circuit and peripheral interfaces. - Page 7 Figure 1-2 Top View of UT986eb (1) Silkscreen: It marks the signals of the pins. The smaller holes around are used to mount the UT986 socket. The printing adopts exposed copper to ensure the flatness of the surface. (2) UT986 module: The pin pads are designed long, which is convenient for soldering, testing and debugging.
- Page 8 UT986 Evaluation Board User Manual Figure 1-3 Bottom View of UT986eb (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 interfaces...
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Page 9: Interfaces
2 Interfaces The dual-row 28 pins serve as the external interfaces of the evaluation board and the pin pitch is 2 mm. The interfaces can be directly connected to the J18 on Unicore HPL EVK-V5.0 board. Figure 2-1 UT986 Interface... - Page 10 No connection inside Ground PPS output No connection inside No connection inside No connection inside No connection inside No connection inside The availability of the ports depends on the firmware version of the module UT986. UC-08-M37 EN P1.0.0 Interfaces...
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Page 11: Power Supply
3 Power Supply The power supply of the evaluation board is input from the VIN 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. -
Page 12: Ldo Power Supply
UT986 Evaluation Board User Manual 3.3 V LDO Power Supply VCC outputs 3.3 V voltage after passing through the LDO circuit to provide power to the evaluation board. 080 5 TPS7A8101DRB 080 5 Vout=0.8*(1+16/5.1)=3.31V Dopout Voltage: 170mV@1A Figure 3-3 LDO Circuit... -
Page 13: Dc/Dc Power Supply
LDO to feed the antenna. Backup Power Supply When using the hot start function of the module UT986, you need to provide backup power for the module. The input range of V_BCKP is 2.0 V to 3.6 V. - Page 14 UT986 Evaluation Board User Manual 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_BCKP, the battery charging circuit should be designed to prevent reverse current to ensure that the battery only supplies power to V_BCKP and the current does not flow back into the 3.3 V power...
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Page 15: Antenna Circuit
4 Antenna Circuit 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. -
Page 16: Antenna Feed Circuit
UT986 Evaluation Board User Manual Antenna Feed Circuit The antenna feed circuit consists of the anti-reverse current design, anti-surge design, filter inductors, and ESD protection. Removing R45 and soldering R46, the antenna short protection circuit is bypassed. Then you can use the 5 V DC/DC circuit output directly to feed the antenna. -
Page 17: Led Indicators
5 LED Indicators There are LED indicators on the evaluation board to indicate the working status of each functional unit. Figure 5-1 LED Indicators Table 5-1 Description of the LED Status LED Indicator Color Description Power (5V or 3.3V) Green Light on when the power is normal Reset Light on when pressing the reset button... -
Page 18: Ut986 Series Peripheral Design
UT986 Evaluation Board User Manual Figure 5-2 Markings on the Right of the LED Indicators 6 UT986 Series Peripheral Design TVS anti-surge protection is added at the input of the module. ESD protection is added at all pins. ... - Page 19 UT986 080 5 Figure 6-1 UT986 Peripheral Design UT986 Series Peripheral Design UC-08-M37 EN P1.0.0...
- Page 20 UT986 Evaluation Board User Manual Silkscreen markings are printed around the module to identify the resistors, which is convenient for measurement. Figure 6-2 UT986 Peripheral Circuit The GND pads at the bottom of the module should be grounded to ensure heat dissipation.
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Page 21: Debug Support
7 Debug Support As mentioned above, TP1 and TP7 can be used to connect an external power to supply VCCIN and V_BCKP and to measure the supply voltage and current. TP3 and TP5 are used for internal debugging J1 is used for MMCX connection. -
Page 22: Appendix
UT986 Evaluation Board User Manual The silkscreen markings of the test points are arranged in order to identify the function of each port. Figure 7-2 Through-Hole Test Points Appendix UT986eb schematics: UC-08-M37 EN P1.0.0 Appendix... - Page 23 LD O 双 排 5V升压 插 COM1 针 双 COM2 排 天线短 插 路保护 针 电路 UT986 RSTN VB CKP ANT_IN Function Diagram Block Interface LEDs 080 5 NFM21PC104R1E3D TPS7A8101DRB 080 5 UT986eb-PCB-V1R0 VIN operation range:3.2V~5V Vout=0.8*(1+16/5.1)=3.31V Dropout Voltage: 170mV@1A Power Filter LDO 3.3V...
- Page 24 UT986 Evaluation Board User Manual FPF2004 Debug1 Ant Bias Debug2 UT986 UT986 080 5 UT986 Module Title Title Title UT986eb UT986eb UT986eb Size Size Size Do cume nt Nu mbe r Do cume nt Nu mbe r Do cume nt Nu mbe r...
- Page 25 Assembly Top of UT986 Appendix UC-08-M37 EN P1.0.0...
- Page 26 UT986 Evaluation Board User Manual Assembly Bottom of UT986 UC-08-M37 EN P1.0.0 Appendix...
- Page 27 和芯星通科技（北京）有限公司 Unicore Communications, Inc. 北京市海淀区丰贤东路 7 号北斗星通大厦三层 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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