Related Manuals for unicore UM980eb
Summary of Contents for unicore UM980eb
- Page 1 HARDWARE USER MANUAL WWW.UNICORECOMM.COM UM980eb Evaluation Board Copyright© 2009-2023, Unicore Communications, Inc. Data subject to change without notice.
- Page 2 Information, such as product specifications, descriptions, features and user guide in this manual, are subject to change by Unicore at any time without prior notice, which may not be completely consistent with such information of the specific product you...
- Page 3 UM980eb User Manual Should you purchase our product and encounter any inconsistency, please contact us or our local authorized distributor for the most up-to-date version of this manual along with any addenda or corrigenda.
- Page 4 Foreword This manual provides information on the hardware composition and design of UM980eb (evaluation board). Target Readers This document is written for technicians who are familiar with GNSS modules.
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Page 5: Table Of Contents
UM980eb User Manual Contents Product Overview ..................... 1 Interfaces ......................... 4 Power Supply ......................6 3.3V LDO Power Supply ....................7 5V DC/DC Power Supply ....................8 Backup Power Supply ...................... 9 Antenna Circuit ...................... 10 Antenna Detection Circuit ..................... 10 Antenna Feed Circuit ..................... -
Page 6: Product Overview
1 Product Overview UM980eb is the evaluation board for UM980 and consists of the UM980 module, a 3.3V low dropout regulator (LDO), a 5V DC/DC boost circuit, an antenna detection circuit and peripheral interfaces. The schematic of the UM980eb can be used as the reference design for the UM980 module. - Page 7 UM980eb User Manual The appearance of UM980eb is shown as follows: Figure 1-2 Top View of UM980eb (1) Silkscreen: It marks the signals of the pins. The smaller holes around are used to mount the UM980 socket. The printing adopts exposed copper to ensure the flatness of the surface.
- Page 8 Figure 1-3 Bottom View of UM980eb (1) Antenna detection circuit (2) Anti-static design and heat dissipation with exposed copper (3) VCC power supply and LDO circuit (4) Backup battery (5) 5 V DC/DC boost circuit for antenna feeding (6) Dual-row pins as external interfaces...
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Page 9: Interfaces
UM980eb User Manual 2 Interfaces The dual-row 28 pins serve as the external interfaces of UM980eb, and the pin pitch is 2 mm. The interfaces can be directly connected to the J18 on Unicore HPL EVK-V5.0 board. CH71283V100 Figure 2-1 UM980eb Interfaces... - Page 10 Pin Name Description SPIS_MISO Master In / Slave Out. This pin is used to transmit data in slave mode. RXD3 COM3 input, can be used as CAN RXD, LVTTL RESET_N System reset, active low. The active time should be no less than 5 ms. —...
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Page 11: Power Supply
The availability of the ports depends on the firmware version of the UM980 module. 3 Power Supply The power supply of the UM980eb 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. -
Page 12: Ldo Power Supply
3.3 V LDO 5 V DC/DC Figure 3-2 3.3 V LDO and 5 V DC/DC on the Bottom of UM980eb 3.1 3.3V LDO Power Supply VCC outputs 3.3 V voltage after passing through the LDO circuit to provide power to UM980eb. -
Page 13: Dc/Dc Power Supply
UM980eb User Manual When using the LDO to power the module, you should consider the power dissipation of the LDO. 3.2 5V DC/DC Power Supply VCC outputs 5 V voltage after passing through the DC/DC boost circuit to feed the antenna. -
Page 14: Backup Power Supply
The input range of V_BCKP is 2.0 V to 3.6 V. Figure 3-5 Backup Power Circuit Figure 3-6 Backup Power Circuit on the Bottom of UM980eb Notes: 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 domain, as the D52... -
Page 15: Antenna Circuit
UM980eb User Manual 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 evaluation board has been placed for a long time, the power of the battery may be low and the hot start test may fail. - Page 16 The antenna feed current < 50 mA; no antenna detected The antenna feed circuit is shorted to ground The antenna feed current > 50 mA; the antenna status is normal Figure 4-2 Antenna Detection Circuit on the Bottom of UM980eb UC-08-M32 EN R1.0 Antenna Circuit...
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Page 17: Antenna Feed Circuit
UM980eb will be bypassed. The ESD protection diode should support high-frequency signal (above 2000 MHz). Nexperia PESD5V0F1BL is recommended here. Figure 4-3 Antenna Feed Circuit Figure 4-4 Antenna Feed Circuit on the Bottom of UM980eb Antenna Circuit UC-08-M32 EN R1.0... -
Page 18: Led Indicators
5 LED Indicators There are LED indicators on UM980eb 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... -
Page 19: Um980 Peripheral Design
UM980eb User Manual Figure 5-2 Markings on the Right of the LED Indicators 6 UM980 Peripheral Design TVS anti-surge protection is added at the input of the UM980 module. ESD protection is added at all pins. Use large and small VCC filter capacitors together, with a total capacitance greater than 30 uF. - Page 20 The GND pads at the bottom of the module should be grounded to ensure heat dissipation. The UM980eb has copper exposed on the bottom of the UM980 module, which not only enhances heat dissipation, but also provides a large area for grounding and is convenient to test.
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Page 21: Debug Support
UM980eb User Manual UM980 Figure 6-3 UM980 Pads (Y1-Y52) and Socket Mounting Holes (X1-X8) 7 Debug Support As mentioned above, TP1 and TP9 can be used to connect an external power to supply VCCIN and V_BCKP and to measure the supply voltage and current. -
Page 22: Appendix
Figure 7-1 Debug Ports for the UM980 Module The silkscreen markings on the right of the test points are arranged in order to identify the function of each port. Figure 7-2 Through-Hole Test Points on UM980eb Appendix Schematic of UM980eb UC-08-M32 EN R1.0... - Page 23 LNA_PWR SW#1 SHDN# SW#2 3.3V GND#1 10uF 10uF 10uF 10uF GND#2 V_BCKP Hole 100nF 5.1k Vout=1.225*(1+16/5.1)=5.07V Unicore Communications,Inc Unicore Communications,Inc Unicore Communications,Inc UM980eb-PCB-V1R0 Title Title Title DC/DC 5V UM980eb UM980eb UM980eb Size Size Size Document Number Document Number Document Number...
- Page 24 SMF5.0A ERR_STAT ERR_STAT GND#32 PIN22 PIN22 RSV#22 RSV#22 PIN31 PIN31 RXD3 RXD3 PIN23 PIN23 RSV#23 RSV#23 PIN30 PIN30 Unicore Communications,Inc Unicore Communications,Inc Unicore Communications,Inc NC#24 TXD3 NC#24 TXD3 NC#25 NC#25 PIN26 PIN26 PIN29 PIN29 Title Title Title RXD2 BIF#29 RXD2...
- Page 25 Assembly Top of UM980eb...
- Page 26 UM980eb User Manual Assembly Bottom of UM980eb...
- 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...