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UM982-EB User Manual

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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 Short Protection Circuit .................................................................................. 10

Antenna Feed Circuit ..................................................................................................... 11

LED Indicators ............................................................................................ 12

UM982 Peripheral Design .......................................................................... 13

Debug Support ........................................................................................... 15

Appendix ........................................................................................................... 16

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Содержание UM982-EB

Страница 1: ...HARDWARE USER MANUAL WWW UNICORECOMM COM Copyright 2009 2022 Unicore Communications Inc Data subject to change without notice UM982 EB Evaluation Board...

Страница 2: ...erial referred to in this manual collectively Unicore Trademarks This manual or any part of it shall not be deemed as either expressly implied by estoppel or any other form the granting or transferrin...

Страница 3: ...Manual ii 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 o...

Страница 4: ...Foreword This manual provides information on the hardware composition and design of the UM982 evaluation board EB Target Readers This document is written for technicians who are familiar with GNSS mod...

Страница 5: ...3 Power Supply 6 3 1 3 3V LDO Power Supply 7 3 2 5V DC DC Power Supply 8 3 3 Backup Power Supply 9 4 Antenna circuit 10 4 1 Antenna Short Protection Circuit 10 4 2 Antenna Feed Circuit 11 5 LED Indica...

Страница 6: ...1 SPIS COM2 RSTN BAT Dual row pins Dual row pins VCC 5V DC DC Antenna protection circuit 5V LDO 3V3 Antenna protection circuit ANT_IN Figure 1 1 UM982 EB Block Diagram 1 Product Overview UM982 EB is t...

Страница 7: ...82 socket The printing adopts exposed copper to ensure the flatness of the surface 2 UM982 module The pin pads are designed long which is convenient for soldering testing and debugging For detailed pa...

Страница 8: ...M982 EB 1 Antenna short protection 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 feedi...

Страница 9: ...erfaces Table 2 1 UM982 EB Pin Description No Pin Name I O Description 1 SPIS_MOSI I Master Out Slave In This pin is used to receive data in slave mode 2 SPIS_CSN I Chip select pin for SPI slave 3 SPI...

Страница 10: ...OM1 input LVTTL 17 GND Ground 18 TXD2 O COM2 output LVTTL 19 RXD2 I COM2 input LVTTL 20 GND Ground 21 PVT_STAT O PVT status active high High level when positioning and low level when not positioning 2...

Страница 11: ...UM982 EB 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...

Страница 12: ...Circuit Notes The rated output current of LDO should be more than twice the maximum operating current of UM982 R32 is a series resistor placed at the input of the LDO which is used for debugging When...

Страница 13: ...hether to use the 5 V power on the board to feed the antenna according to the antenna type R59 and R74 are series resistors connected to the DC DC circuit at the input and output which are used for de...

Страница 14: ...the backup battery 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 D64 sho...

Страница 15: ...power source supplies the antenna after passing through the load management chip When the current of the antenna circuit is greater than 100 mA it will trigger short circuit protection and FLAGB will...

Страница 16: ...it consists of the anti reverse current design anti surge design filter inductors and ESD protection Removing R77 and R6 and soldering R79 and R8 you can directly use the 5 V power to supply the anten...

Страница 17: ...D Indicators UC 08 M31 EN P1 0 3 Figure 4 4 Antenna Feed Circuit on the Bottom of UM982 EB 5 LED Indicators There are LED indicators on UM982 EB to indicate the working status of each functional unit...

Страница 18: ...R Red Light on when failing self test UART Green Blinking when UART is working The silkscreen markings on the right of the LED indicators identify the corresponding function as shown in the figure bel...

Страница 19: ...e at TP1 and a ground wire at TP3 as shown in Figure 7 1 you can use an external power to supply the module This method can be used to measure the input voltage and current of UM982 0805 U1A UM982 Fig...

Страница 20: ...l power to supply VCCIN and V_BCKP and to measure the supply voltage and current TP2 TP4 TP6 and TP8 are used for internal debugging of which TP6 and TP8 can be used to debug I2 C J1 and J2 are used f...

Страница 21: ...Debug3 Debug4 J2 NC J1 NC Figure 7 1 Debug Ports for the UM982 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 Th...

Страница 22: ...f Interface Power LEDs V1 0 UM982eb B 3 5 Friday May 20 2022 Unicore Communications Inc Title Size Document Number Rev Date Sheet o f Interface Power LEDs V1 0 UM982eb B 3 5 Friday May 20 2022 Unicore...

Страница 23: ...ore Communications Inc D41 R67 0 L5 22uH R27 0 C1 100nF R54 NC D55 D51 C25 100pF L4 68nH R88 0 R19 0 R8 NC TP3 C32 100nF D39 R63 33 D40 D23 R40 NC D42 C17 100pF C24 NC D50 R3 NC R45 NC R65 NC R13 33 C...

Страница 24: ...Assembly Top of UM982 EB...

Страница 25: ...Assembly Bottom of UM982 EB...

Страница 26: ...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...

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