Quectel SC20 User manual

Smart EVB User Guide
LTE Module Series
Rev. Smart_EVB_User_Guide_V1.0
Date: 2016-09-30
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Our aim is to provide customers with timely and comprehensive service. For any
assistance, please contact our company headquarters:
Quectel Wireless Solutions Co., Ltd.
Office 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233
Tel: [phone]
Email: [email protected]om
Or our local office. For more information, please visit:
http://www.quectel.com/support/salesupport.aspx
For technical support, or to report documentation errors, please visit:
http://www.quectel.com/support/techsupport.aspx
Or email to: [e-mail]
GENERAL NOTES
QUECTEL OFFERS THE INFORMATION AS A SERVICE TO ITS CUSTOMERS. 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
CHANGE WITHOUT PRIOR NOTICE.
COPYRIGHT
THE INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF
QUECTEL CO., LTD. TRANSMITTING, REPRODUCTION, DISSEMINATION AND EDITING OF THIS
DOCUMENT AS WELL AS UTILIZATION OF THE CONTENT ARE FORBIDDEN WITHOUT
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ARE RESERVED IN THE EVENT OF A PATENT GRANT OR REGISTRATION OF A UTILITY MODEL
OR DESIGN.
Copyright © Quectel Wireless Solutions Co., Ltd. 2016. All rights reserved.
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About the Document
History
Revision
Date
Author
Description
1.0
2016-09-30
Vae LIU
Initial
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Contents
About the Document...................................................................................................................................2
Contents.......................................................................................................................................................3
Table Index...................................................................................................................................................4
Figure Index.................................................................................................................................................5
1Introduction..........................................................................................................................................6
1.1. Safety Information...................................................................................................................7
2General Overview.................................................................................................................................8
2.1. Key Features...........................................................................................................................8
2.2. Interface Overview...................................................................................................................9
2.3. EVB View............................................................................................................................... 11
2.4. EVB Accessories................................................................................................................... 11
3Interface Application .........................................................................................................................13
3.1. Power Interface .....................................................................................................................13
3.2. USB Device Interface............................................................................................................14
3.3. Audio Interface ......................................................................................................................15
3.3.1. Loud Speaker.................................................................................................................15
3.3.2. Earphone........................................................................................................................16
3.3.3. MIC and Speaker ...........................................................................................................17
3.4. USIM Card Interfaces............................................................................................................18
3.5. UART Interfaces....................................................................................................................19
3.6. Switches and Buttons............................................................................................................20
3.7. Status LEDs...........................................................................................................................22
3.8. Test Points.............................................................................................................................23
4Operation Procedure.........................................................................................................................25
4.1. Power ON..............................................................................................................................25
4.2. Power OFF............................................................................................................................25
4.3. Reset .....................................................................................................................................26
4.4. Communication Via USB or UART Interface.........................................................................26
4.4.1. Communication via USB Interface.................................................................................26
4.4.2. Communication via UART Interface...............................................................................26
4.5. Firmware Upgrade.................................................................................................................27
5EVB Accessories Assembly .............................................................................................................28
6Appendix A Reference.......................................................................................................................29
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Table Index
TABLE 1: FEATURES OF SMART EVB.............................................................................................................. 8
TABLE 2: INTERFACES OF SMART EVB.......................................................................................................... 9
TABLE 3: ACCESSORIES LIST.........................................................................................................................11
TABLE 4: PIN ASSIGNMENT OF USB DEVICE INTERFACE J602................................................................. 15
TABLE 5: PIN ASSIGNMENT OF J702............................................................................................................. 16
TABLE 6: PIN ASSIGNMENT OF USIM CARD................................................................................................. 19
TABLE 7: PIN ASSIGNMENT OF J901............................................................................................................. 20
TABLE 8: DESCRIPTION OF SWITCHES AND BUTTONS............................................................................. 21
TABLE 9: DESCRIPTION OF STATUS LEDS................................................................................................... 22
TABLE 10: DETAILS OF TEST POINTS........................................................................................................... 23
TABLE 11: RELATED DOCUMENTS................................................................................................................ 29
TABLE 12: TERMS AND ABBREVIATIONS...................................................................................................... 29
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Figure Index
FIGURE 1: INTERFACE OVERVIEW ................................................................................................................. 9
FIGURE 2: EVB TOP VIEW ...............................................................................................................................11
FIGURE 3: EVB ACCESSORIES...................................................................................................................... 12
FIGURE 4: SIMPLIFIED POWER SUPPLY SCHEMATIC ................................................................................ 13
FIGURE 5: POWER INTERFACE ..................................................................................................................... 14
FIGURE 6: USB INTERFACE CIRCUIT............................................................................................................ 14
FIGURE 7: LOUD SPEAKER CIRCUIT ............................................................................................................ 15
FIGURE 8: EARPHONE CIRCUIT .................................................................................................................... 16
FIGURE 9: PIN ASSIGNMENT OF J702........................................................................................................... 16
FIGURE 10: THE SKETCH OF AUDIO JACK................................................................................................... 17
FIGURE 11: MIC AND SPEAKER CIRCUIT...................................................................................................... 17
FIGURE 12: SCHEMATIC OF SIMPLIFIED USIM CARD INTERFACES......................................................... 18
FIGURE 13: PINS ASSIGNMENT OF USIM CARD HOLDER.......................................................................... 18
FIGURE 14: UART BLOCK DIAGRAM ............................................................................................................. 19
FIGURE 15: MAIN UART PORT (J901)............................................................................................................ 20
FIGURE 16: SWITCHES AND BUTTONS ........................................................................................................ 21
FIGURE 17: STATUS LEDS.............................................................................................................................. 22
FIGURE 18: PINS ASSIGNMENT OF J904...................................................................................................... 23
FIGURE 19: MENU ON LCM ............................................................................................................................ 25
FIGURE 20: SELECT THE USB PORT TO UPDATE FIRMWARE................................................................... 27
FIGURE 21: SMART EVB AND ACCESSORIES ASSEMBLY.......................................................................... 28
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1Introduction
This document describes the evaluation board of Quectel SC20 Smart module series. The Smart
evaluation board is an assistant system integrator for developing and evaluating products based on
Quectel Smart modules.
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1.1. Safety Information
The following safety precautions must be observed during all phases of the operation, such as usage,
service or repair of any cellular terminal or mobile incorporating Quectel module. Manufacturers of the
cellular terminal should send the following safety information to users and operating personnel, and
incorporate these guidelines into all manuals supplied with the product. If not so, Quectel assumes no
liability for customer’s failure to comply with these precautions.
Full attention must be given to driving at all times in order to reduce the risk of an
accident. Using a mobile while driving (even with a handsfree kit) causes
distraction and can lead to an accident. You must comply with laws and regulations
restricting the use of wireless devices while driving.
Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it is
switched off. The operation of wireless appliances in an aircraft is forbidden, so as
to prevent interference with communication systems. Consult the airline staff about
the use of wireless devices on boarding the aircraft, if your device offers an
Airplane Mode which must be enabled prior to boarding an aircraft.
Switch off your wireless device when in hospitals, clinics or other health care
facilities. These requests are desinged to prevent possible interference with
sensitive medical equipment.
Cellular terminals or mobiles operating over radio frequency signal and cellular
network cannot be guaranteed to connect in all conditions, for example no mobile
fee or with an invalid SIM card. While you are in this condition and need emergent
help, please remember using emergency call. In order to make or receive a call,
the cellular terminal or mobile must be switched on and in a service area with
adequate cellular signal strength.
Your cellular terminal or mobile contains a transmitter and receiver. When it is ON,
it receives and transmits radio frequency energy. RF interference can occur if it is
used close to TV set, radio, computer or other electric equipment.
In locations with potentially explosive atmospheres, obey all posted signs to turn
off wireless devices such as your phone or other cellular terminals. Areas with
potentially explosive atmospheres include fuelling areas, below decks on boats,
fuel or chemical transfer or storage facilities, areas where the air contains
chemicals or particles such as grain, dust or metal powders, etc.
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2General Overview
Quectel supplies Smart EVB kit for testing basic functionalities on Smart modules.
2.1. Key Features
Smart EVB offers the following features:
Two USIM interfaces
Two UART interfaces
Multiple audio interface
USB interface
Keypads and LED indication lights
Table 1: Features of Smart EVB
Features
Implementation
Power Supply
USB supply voltage: 4.75~6.0V; typical supply voltage: 5.0V
VBAT supply voltage: 3.5~4.3V; typical supply voltage: 3.8V
USIM Interfaces
Support card detection
Support USIM/SIM cards: 3.0V and 1.8V
Audio Interface
Analog interface used for loud speaker, microphone, earphone and
handset
UART Interfaces
Two UART interfaces:
Main UART for data transmission
Debug UART for debugging
Max. baud rate: 460800bps
USB Interface
USB 2.0, support high speed and OTG function
Signal Indication
4 LEDs are available for signal indication
Buttons
9 buttons
Switches
4 switches
Physical Characteristics
Size: 24cm ×18cm
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2.2. Interface Overview
Figure 1: Interface Overview
Table 2: Interfaces of Smart EVB
Interface
Reference Number
Description
VBAT
J801
Connector used for battery
Power Switch
S801
Switch for battery and DC_POWER
S803
Control power ON/OFF
PWRKEY
S901
PWRKEY push button
It’s used to turn on/off the module.
J903
Jumper is used to connect PWRKEY to GND
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Some of these functions may not be supported on some modules. For details, please refer to relative
module reference designs and hardware designs.
RESET
S908
Reset push button. It’s used to reset the module.
Micro USB
J602
USB device interface
USB_VBUS supply voltage: +5.0V
Audio
Speaker
Loud speaker
Earphone
Earphone
MIC
Microphone
J702
Headset
USIM
J503
Main USIM card holder
J504
Sub USIM card holder
UART
J901
Main UART port
J604
Debug UART port
LEDs
D805, D806, D807,
D808
D805 and D807 indicate network registration mode of
the module.
D806 indicates the power ON/OFF status.
D808 indicates operation status of the module.
TE-A
J101, J102
TE-A module connector
NOTE
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2.3. EVB View
Figure 2: EVB Top View
2.4. EVB Accessories
All the items of EVB kit are listed in table and figure below. Please contact the supplier if there is
something missing.
Table 3: Accessories List
Items
Description
Quantity
Cables
USB to UART converter cable
1
USB cable
1
RF cable
4
Antennas
Main antenna
2
WiFi antenna
1
Smart
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Figure 3: EVB Accessories
The main antenna can also be used for diversity reception.
GNSS antenna (passive)
1
Audio
Earphone
1
Disk
USB2.0 to RS232 driver and USB driver disk
1
Battery
Li-polymer battery
1
Other
Bolts and nuts for fixing EVB
1
NOTE
USB to UART converter cable
Li-polymer battery
Earphone
Main antenna
Driver disk
WiFi antenna
GNSS antenna
Bolts and nuts
USB cable
RF cable
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3Interface Application
This chapter describes the hardware interfaces of Smart EVB, shown as follows:
Power interface
USB interface
Audio interface
USIM card interfaces
UART interfaces
It also provides information about LEDs, buttons and test points to help customers use the Smart EVB.
3.1. Power Interface
The power supply of Smart EVB could come from the external input which is connected with USB
receptacle. The USB receptacle is connected with a step-down converter to provide the supply voltage
(VBAT) required for operating the module.
The following figures show the simplified power supply schematic and the power interface of Smart EVB.
Power ON/OFF
down converter
Power supply to
the module
J602
USB
interface
Step-
U801
DCDC S801
J801
VBAT
interface
S803
Power switch
Figure 4: Simplified Power Supply Schematic
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Figure 5: Power Interface
3.2. USB Device Interface
The Smart EVB provides a USB 2.0 interface which complies with USB 2.0 standard and supports OTG
function. It is used for AT command communication, data transmission, firmware upgrade and GNSS
NEMA output.
Meanwhile, Smart EVB provides a micro-USB receptacle J602 to connect with a host device. The
USB_DP and USB_DM data lines are connected directly to the module. The schematic of the USB
interface is shown in the following figure and the pin assignment of the J602 is listed in the table below.
Figure 6: USB Interface Circuit
J602
USB 5V
J801
VBAT
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Table 4: Pin Assignment of USB Device Interface J602
3.3. Audio Interface
Smart module provides a digital audio interface (PCM). The analog interface J702 on the Smart EVB is
used for loud speaker, earphone and microphone.
3.3.1. Loud Speaker
Loud speaker is soldered via TP701 and TP702. The following figure shows the loud speaker circuit.
SPK_P
SPK_N
10pF
10pF 33pF
33pF
Close to speaker
GND
GND
ESD
ESD
FB
FB
Smart EVB
Figure 7: Loud Speaker Circuit
J602
Pin Name
Function
1
USB_VBUS
This pin is used for USB detection and power supply.
2
USB_DM
USB serial differential bus (minus)
3
USB_DP
USB serial differential bus (positive)
4
USB_ID
USB serial ID signal
5
GND
GND for USB interface
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3.3.2. Earphone
An earphone can be used in audio interface J702. The following figures and table show the circuit of J702
audio interface for earphone and pin assignment of J702.
Figure 8: Earphone Circuit
Figure 9: Pin Assignment of J702
Table 5: Pin Assignment of J702
J404
Pin Name
Function
1
MIC
Positive microphone input
2
GND
Dedicated GND for audio
3
R-AUDIO
Earphone right channel
1
2
3
6
4
5
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The following figure shows the sketch of audio jack which matches the Smart EVB.
2
1
MIC
GND
SW
SPK_R
SPK_L
3
4
32Ω
32Ω
Figure 10: The Sketch of Audio Jack
3.3.3. MIC and Speaker
SMT U701 MIC is used for microphone and speaker is soldered on TP703 and TP704. The following
figure shows the schematic of the MIC and Speaker.
ESD
33pF
ESD
ESD ESD
33pF
33pF33pF
100pF
100pF
MIC1_P
MIC1_N
EAR_P
EAR_N
FB
EVB
MIC_BIAS
HPH_R
HPH_L
U701 MIC
TP703
TP704 REC
Figure 11: MIC and Speaker Circuit
4
DETECT
Earphone detection
5
L-AUDIO
Earphone left channel
6
GND
Dedicated GND for audio
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3.4. USIM Card Interfaces
The Smart EVB has two USIM card interfaces. A suitable USIM card (3V or 1.8V) is required to start the
Smart module. The following figure and table show the simplified interface schematic and pin assignment
of J503.
USIM card holder
USIM_ VDD
USIM_CLK
USIM _DATA
USIM_RST
USIM_GND
EVB J 503
C1
C7
C2
C3
Push-Push
USIM_VDD
USIM_DATA
USIM_RST
USIM_CLK
USIM_PRE
GND
USIM_DETECT CD2
CD1
Figure 12: Schematic of Simplified USIM Card Interfaces
Figure 13: Pins Assignment of USIM Card Holder
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Table 6: Pin Assignment of USIM Card
Pin assignment of J504 is the same as that of J503.
3.5. UART Interfaces
Smart EVB offers two UART interfaces, which are main UART port (J901) and debug UART port (J604).
The UART interface J901 is intended for the communication between the module and the host application.
This interface can be used for data transmission and AT command communication. And the debug UART
interface is used for debugging.
The following figure and table show the UART block diagram on Smart EVB and pin assignment of J901.
J101
Module
RS232
Level Match 3.3V/1.8V
Level Translator
UART
DB9
J901
RS232 3.3V 1.8V
U902
U901
Figure 14: UART Block Diagram
No.
Pin Name
I/O
Function
C1
USIM_VDD
O
USIM/SIM card power
C2
USIM_RST
O
USIM/SIM card reset
C3
USIM_CLK
O
USIM/SIM card clock
C5
GND
Ground
C6
VPP
Not connected
C7
USIM_DATA
I/O
Data line, bi-directional
CD1
GND
GND
USIM card detection
CD2
USIM_PRESENCE
I
USIM card detection
NOTE
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