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GNSS Module Series

LC79D (A) EVB User Guide

LC79D(A)_EVB_User_Guide 9 / 21

3

Interface Applications

3.1. Micro USB Interface

The EVB is mounted with a micro USB connector to support power supply input and data transmission.

Micro-USB connector

Figure 4: Micro USB Connector

Before using the EVB, please run the USB flash drive on PC to install the USB driver.

3.2. Antenna Interface

The EVB is mounted with an antenna connector for connection of an external passive or active GNSS

antenna.

NOTE

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Summary of Contents for LC79D (A) EVB

Page 1: ...LC79D A EVB User Guide GNSS Module Series Rev LC79D A _EVB_User_Guide_V1 0 Date 2019 11 14 Status Released www quectel com ...

Page 2: ...THE INFORMATION PROVIDED IS BASED UPON CUSTOMERS REQUIREMENTS QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION ALL INFORMATION SUPPLIED HEREIN IS SUBJECT TO CHA...

Page 3: ...GNSS Module Series LC79D A EVB User Guide LC79D A _EVB_User_Guide 1 21 About the Document History Revision Date Author Description 1 0 2019 11 14 Brooke WANG Initial ...

Page 4: ...8 3 Interface Applications 9 3 1 Micro USB Interface 9 3 2 Antenna Interface 9 3 3 Switches and Buttons 10 3 4 Operation Status Indication LEDs 11 3 5 Test Points 12 4 EVB Operation Procedures 14 4 1 Firmware Download 14 4 1 1 Firmware Download in Normal Working Mode 14 4 1 2 Firmware Download in Host Mode 15 4 2 Communication via Micro USB Interface 15 5 Usage of QGNSS 17 5 1 COM and Baud Rate Se...

Page 5: ...ndex TABLE 1 INTERFACES OF LC79D A EVB 6 TABLE 2 LIST OF ACCESSORIES 8 TABLE 3 SWITCHES AND BUTTONS 10 TABLE 4 OPERATION STATUS INDICATION LEDS 11 TABLE 5 PIN DESCRIPTION OF J104 12 TABLE 6 PIN DESCRIPTION OF J105 13 TABLE 7 RELATED DOCUMENTS 20 TABLE 8 TERMS AND ABBREVIATIONS 20 ...

Page 6: ... AND BUTTONS 10 FIGURE 7 OPERATION STATUS INDICATION LEDS 11 FIGURE 8 J104 TEST POINTS 12 FIGURE 9 J105 TEST POINTS 13 FIGURE 10 GNSSFLASHTOOL CONFIGURATIONS FOR FIRMWARE UPGRADE 14 FIGURE 11 GNSSFLASHTOOL CONFIGURATIONS FOR HOST MODE DOWNLOAD 15 FIGURE 12 USB PORTS 15 FIGURE 13 COM PORT SETTING INTERFACE OF QCOM 16 FIGURE 14 COM PORT AND BAUD RATE SELECTION 17 FIGURE 15 QGNSS INTERFACE 18 FIGURE ...

Page 7: ...pplied with the product If not so Quectel assumes no liability for customers failure to comply with these precautions Ensure that the use of the product meets the national safety and environmental regulations and is allowed in the country and in the environment required Keep away from explosive and flammable materials The use of electronic products in extreme power supply conditions and locations ...

Page 8: ... 2 1 Top View of the EVB The following figure illustrates the top view of LC79D A EVB A B C D E F G H J K I Figure 1 Top View of LC79D A EVB Table 1 Interfaces of LC79D A EVB SN Reference No Description A J102 Antenna connector B D101 1PPS Indication LED C D103 Transmit Data Indication LED ...

Page 9: ...Accessories GNSS Antenna EVB USB Flash Drive Micro USB Cable Bolts and Coupling Nuts Figure 2 EVB Kit Accessories D J202 Micro USB connector E S201 Power Switch F S103 WAKE_UP Button G S101 NSTANDBY Button H S102 BOOT Button I J104 Test Points J U102 LC79D A Module K J105 Test Points ...

Page 10: ...sories Figure 3 LC79D A EVB and Accessories Assembly Items Description Quantity USB Cable Micro USB Cable 1 EVB LC79D A evaluation board 1 Antenna GNSS antenna Active 1 USB Flash Drive USB Flash Drive including LC79D related documents tools drivers etc 1 Instruction Sheet A sheet of paper giving instructions for EVB connection details of EVB accessories etc 1 Other Bolts and coupling nuts 4 for ea...

Page 11: ...th a micro USB connector to support power supply input and data transmission Micro USB connector Figure 4 Micro USB Connector Before using the EVB please run the USB flash drive on PC to install the USB driver 3 2 Antenna Interface The EVB is mounted with an antenna connector for connection of an external passive or active GNSS antenna NOTE ...

Page 12: ...d Buttons Table 3 Switches and Buttons Part No Name I O Description S101 NSTANDBY DI 1 Long press press and hold the NSTANDBY button to enter standby mode and release the button to exit from standby mode 2 Short press press and then release the NSTANDBY button to reset the module S102 BOOT DI Press and hold the BOOT button during EVB power on to make the module enter host mode S103 WAKE_UP DI On t...

Page 13: ...Ds PQSETSLEEP 1 command Long press WAKE_UP button to exit from sleep mode and then send PQSTARTGNSS to start the GNSS engine S201 POWER PI EVB power on off switch Part No Name I O Description D101 1PPS DO Flash successful fix The frequency is 1Hz Extinct no fix D103 TXD DO Flash the module is turned on successfully and the micro USB port can output NMEA messages Extinct failed to turn on the modul...

Page 14: ...t points Table 5 Pin Description of J104 Pin No Signal I O Description 1 CTS DI Clear to send 2 RTS DO Request to send 3 REQ DO Data availability indication used to indicate whether there is data available for reading 4 RXD DI Receive data 5 1PPS DO One pulse per second 6 TXD DO Transmit data 7 AP_REQ DI AP request to send 8 STDBY DI Standby mode control 9 RDY DO Reserved 10 GND Ground ...

Page 15: ...9D A _EVB_User_Guide 13 21 1 2 3 4 5 Figure 9 J105 Test Points Table 6 Pin Description of J105 Pin No Signal I O Description 1 SDA OD I2C serial clock 2 SCL OD I2C serial data 3 INT DI Interrupt 4 GND Ground 5 VCC_1 8V PO 1 8V output power supply ...

Page 16: ...n both normal working mode and host mode 4 1 1 Firmware Download in Normal Working Mode Step 1 Connect the EVB to a PC with a micro USB cable Step 2 Turn on the POWER switch S201 to power on the EVB Step 3 Run the GNSSFlashTool and then configure the tool as shown below Figure 10 GNSSFlashTool Configurations for Firmware Upgrade Please make sure the module is in full on mode before downloading fir...

Page 17: ...nterface Step 1 Connect the EVB to a PC with a micro USB cable through the micro USB interface and then turn on the POWER switch S201 to power on the EVB Step 2 Run the USB flash drive on PC to install the USB driver The USB port numbers can be viewed through the PC Device Manager as shown below Figure 12 USB Ports Step 3 Install and then use the QCOM tool provided by Quectel to realize the commun...

Page 18: ...GNSS Module Series LC79D A EVB User Guide LC79D A _EVB_User_Guide 16 21 Figure 13 COM Port Setting Interface of QCOM ...

Page 19: ...the tool while operating the EVB For more details of the usage of QGNSS please refer to document 5 5 1 COM and Baud Rate Setting After successful EVB connection turn on the module and start up the QGNSS Click Connect UART select correct COM port and baud rate 115200bps by default and then click OK Figure 14 COM Port and Baud Rate Selection After the tool is opened the following interface in defaul...

Page 20: ...e QGNSS interface users will be able to check GNSS receiver information such as CNR message time position satellite information precision and so on 5 2 PQ Command Sending PQ commands can be sent through QGNSS For more details about PQ commands please refer to document 2 Figure 16 PQ Command Sending via QGNSS ...

Page 21: ... and hot start conditions can be tested through QGNSS and the number of tests can be selected from 10 20 50 100 and 1000 to meet individual demands After selecting the ReStart Type and Times click the Start button to start the test and it can be stopped by clicking the Stop button Figure 17 Static TTFF Testing via QGNSS ...

Page 22: ..._Specification LC79D GNSS Protocol Specification 3 Quectel_LC79D_Reference Design LC79D Reference Design 4 Quectel_QCOM_User_Guide QCOM User Guide 5 Quectel_QGNSS_User_Guide QGNSS User Guide Abbreviation Description CNR Carrier to Noise Ratio DI Digital Input DO Digital Output EVB Evaluation Board GNSS Global Navigation Satellite System GPS Global Positioning System LED Light Emitting Diode LNA Lo...

Page 23: ...GNSS Module Series LC79D A EVB User Guide LC79D A _EVB_User_Guide 21 21 PPS Pulse Per Second PRN Pseudorandom Noise SV Satellite Vehicle TTFF Time To First Fix UTC Universal Time Coordinated ...

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