Related Manuals for unicore UT986eb
Summary of Contents for unicore UT986eb
- Page 1 用户手册 HARDWARE USER MANUAL WWW.UNICORECOMM.COM UT986eb Evaluation Board Copyright© 2009-2023, Unicore Communications, Inc. Data subject to change without notice.
- Page 2 UT986eb User Manual Revision History Version Revision History Date R1.0 First release Nov., 2023...
- 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 UT986eb 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
Contents Product Overview ................... 1 Interfaces ....................4 Power Supply ..................6 3.3 V LDO Power Supply....................7 5 V DC/DC Power Supply ....................8 Backup Power Supply ...................... 9 Antenna Circuit ..................11 Antenna Short Protection Circuit ................. 11 Antenna Feed Circuit .................... -
Page 6: Product Overview
UT986eb 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 The appearance of UT986eb is as follows: 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.
- Page 8 UT986eb 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 UT986eb User Manual Pin Name I/O Description RXD2 COM2 input, LVTTL Ground 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.
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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
UT986eb 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 Notes: The rated output current of LDO should be more than twice the current of the ... -
Page 13: Dc/Dc Power Supply
5 V DC/DC Power Supply VCC outputs 5 V voltage after passing through the DC/DC boost circuit to feed the antenna. LT3467AIDDB Vout=1.225*(1+16/5.1)=5.07V Figure 3-4 5 V DC/DC Boost Circuit Notes: You can choose whether to use the 5 V power on the board to feed the antenna ... -
Page 14: Backup Power Supply
UT986eb User Manual 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. Figure 3-5 Backup Power Circuit... - Page 15 voltage and current of V_BCKP. In the case of normal power supply to the evaluation board, the micro battery charging circuit on the board will automatically charge the micro battery. If the board has been placed for a long time, the power of the battery may be low and the hot start test may fail.
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Page 16: Antenna Circuit
UT986eb User Manual 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 17: Antenna Feed Circuit
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. The ESD protection diode should support high-frequency signal (above 2000 MHz). -
Page 18: Led Indicators
UT986eb User Manual 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) -
Page 19: Ut986 Series Peripheral Design
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. Use large and small VCC filter capacitors together, with a total capacitance greater than 30 μF. - Page 20 UT986eb User Manual UT986 080 5 Figure 6-1 UT986 Peripheral Design UC-08-M37 EN R1.0 UT986 Series Peripheral Design...
- Page 21 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. The evaluation board has copper exposed on the bottom of the module, which not only enhances heat dissipation, but also provides a large area for grounding and is convenient to test UT986...
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Page 22: Debug Support
UT986eb User Manual 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 ... -
Page 23: Appendix
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: Appendix UC-08-M37 EN R1.0... - Page 24 UT986eb User Manual UT986eb CH71283V100 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...
- Page 25 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 Re v Re v...
- Page 26 UT986eb User Manual Assembly Top of UT986 UC-08-M37 EN R1.0 Appendix...
- Page 27 Assembly Bottom of UT986 Appendix UC-08-M37 EN R1.0...
- Page 28 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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