Quectel LC79D (A) EVB User manual

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

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About the Document
History
Revision
Date
Author
Description
1.0
2019-11-14
Brooke WANG
Initial

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Contents
About the Document.................................................................................................................................. 1
Contents...................................................................................................................................................... 2
Table Index.................................................................................................................................................. 3
Figure Index................................................................................................................................................ 4
1Introduction ......................................................................................................................................... 5
1.1. Safety Information...................................................................................................................... 5
2General Overview................................................................................................................................ 6
2.1. Top View of the EVB .................................................................................................................. 6
2.2. EVB KitAccessories .................................................................................................................. 7
2.3. EVB and Accessories Assembly................................................................................................ 8
3Interface 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
4EVB 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
5Usage of QGNSS............................................................................................................................... 17
5.1. COM and Baud Rate Setting................................................................................................... 17
5.2. PQ Command Sending............................................................................................................ 18
5.3. Automatic TTFF Testing........................................................................................................... 19
6Appendix A References.................................................................................................................... 20

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Table Index
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

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Figure Index
FIGURE 1: TOP VIEW OF LC79D (A) EVB ........................................................................................................ 6
FIGURE 2: EVB KIT ACCESSORIES ................................................................................................................. 7
FIGURE 3: LC79D (A) EVB AND ACCESSORIES ASSEMBLY ......................................................................... 8
FIGURE 4: MICRO USB CONNECTOR ............................................................................................................. 9
FIGURE 5: ANTENNA CONNECTOR............................................................................................................... 10
FIGURE 6: SWITCHES 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 PORTAND BAUD RATE SELECTION ............................................................................... 17
FIGURE 15: QGNSS INTERFACE.................................................................................................................... 18
FIGURE 16: PQ COMMAND SENDING VIA QGNSS....................................................................................... 18
FIGURE 17: STATIC TTFF TESTING VIA QGNSS........................................................................................... 19

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1Introduction
This document specifies the usage of LC79D (A) EVB which is an assistant tool for engineers to develop
and test Quectel LC79D (A) module.
1.1. Safety Information
The following safety precautions must be observed during all phases of operation, such as usage, service
or repair of any terminal incorporating Quectel LC79D (A) module. Manufacturers of the terminal should
notify users and operating personnel of the following safety information by incorporating these guidelines
into all manuals supplied 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 awayfrom explosive and flammable materials. The use of electronic products
in extreme power supply conditions and locations with potentially explosive
atmospheres may cause fire and explosion hazards.
The product has to be powered by a stabilized voltage source, and the wiring shall
conform to security and fire prevention regulations.
Proper ESD handling procedures must be applied throughout the mounting,
handling and operation of any application that incorporates the module to avoid
ESD damages.

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2General Overview
2.1. Top View of the EVB
The following figure illustrates the top view of LC79D (A) EVB.
A
B
C
D
EFGH
J
KI
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

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2.2. EVB Kit 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

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Table 2: List of Accessories
2.3. EVB and Accessories Assembly
The following figure shows the assembly of LC79D (A) EVB and its accessories.
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 each