Quectel Smart Wi-Fi Module Series User manual

SC20-W Manual
Smart Wi-Fi Module Series
Rev: SC20-W_Manual_R1.0
Date: 2017-08-04
www.quectel.com

SC20-W_Manual_R1.0 Confidential / Released 1 / 41
Our aim is to provide customers with timely and comprehensive service. For any
assistance, please contact our company headquarters:
Quectel Wireless Solutions Co., Ltd.
7th Floor, Hongye Building, No.1801 Hongmei Road, Xuhui District, Shanghai 200233, China
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
PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF DAMAGES. ALL RIGHTS
ARE RESERVED IN THE EVENT OF A PATENT GRANT OR REGISTRATION OF A UTILITY MODEL
OR DESIGN.
Copyright © Quectel Wireless Solutions Co., Ltd. 2017. All rights reserved.

SC20-W_Manual_R1.0 Confidential / Released 2 / 41
About the Document
History
Revision Date Author Description
1.0 2017-08-04 NINA DOU SC20-W_Manual_R1.0

SC20-W_Manual_R1.0 Confidential / Released 3 / 41
Contents
About the Document...................................................................................................................................2
Contents.......................................................................................................................................................3
1Introduction..........................................................................................................................................5
1.1. Safety Information......................................................................................................................5
2Product Concept..................................................................................................................................7
2.1. General Description...................................................................................................................7
2.2. Key Features .............................................................................................................................8
2.3. Functional Diagram .................................................................................................................10
2.4. Evaluation Board ..................................................................................................................... 11
3Application Interfaces .......................................................................................................................12
3.1. General Description.................................................................................................................12
3.2. Pin Assignment........................................................................................................................13
3.3. Power Supply...........................................................................................................................14
3.4. Turn on and off Scenarios .......................................................................................................14
3.4.1. Turn on Module Using the PWRKEY.............................................................................14
3.4.2. Turn off Module..............................................................................................................15
3.5. VRTC Interface........................................................................................................................16
3.6. Power Output...........................................................................................................................17
3.7. Battery Charge and Management...........................................................................................17
3.8. USB Interface ..........................................................................................................................18
4Wi-Fi and BT.......................................................................................................................................19
4.1. Wi-Fi Overview ........................................................................................................................19
4.2. BT Overview ............................................................................................................................19
5Antenna Interface...............................................................................................................................21
5.1. Wi-Fi/BTAntenna Interface .....................................................................................................21
5.1.1. Reference Design of RF Layout.....................................................................................22
5.2. Antenna Installation.................................................................................................................24
5.2.1. Antenna Requirements ..................................................................................................24
5.2.2. Recommended RF Connector for Antenna Installation.................................................24
6Electrical, Reliability and Radio Characteristics............................................................................27
6.1. Absolute Maximum Ratings.....................................................................................................27
6.2. Power Supply Ratings.............................................................................................................27
6.3. Charging Performance Specifications.....................................................................................28
6.4. Operating Temperature............................................................................................................28
6.5. Current Consumption ..............................................................................................................29
6.6. Electrostatic Discharge............................................................................................................30
7Mechanical Dimensions....................................................................................................................31

SC20-W_Manual_R1.0 Confidential / Released 4 / 41
7.1. Mechanical Dimensions of the Module....................................................................................31
7.2. Recommended Footprint.........................................................................................................33
7.3. Top and Bottom View of the Module........................................................................................34
8Storage, Manufacturing and Packaging..........................................................................................35
8.1. Storage.....................................................................................................................................35
8.2. Manufacturing and Welding.....................................................................................................36
8.3. Packaging................................................................................................................................37
9IC & FCC Requirement ......................................................................................................................39
9.1. FCC Regulations: ....................................................................................................................39
9.2. RF Exposure Information.........................................................................................................39
9.3. ISED Notice.............................................................................................................................39
9.4. ISED Radiation Exposure Statement ......................................................................................40
9.5. IMPORTANT NOTE:................................................................................................................40
9.6. USERS MANUAL OF THE END PRODUCT:..........................................................................40
9.7. LABEL OF THE END PRODUCT:...........................................................................................41

SC20-W_Manual_R1.0 Confidential / Released 5 / 41
1Introduction
This document defines the SC20-W module and describes its air interface and hardware interface which
are connected with your application.
This document can help you quickly understand module interface specifications, electrical and
mechanical details as well as other related information of SC20-W module. Associated with application
note and user guide, you can use SC20-W module to design and set up mobile applications easily.
1.1. Safety Information
The following safety precautions must be observed during all phases of operation, such as usage, service
or repair of any cellular terminal or mobile incorporating SC20-W 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 the
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.

SC20-W_Manual_R1.0 Confidential / Released 6 / 41
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 USIM/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 exposive 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.
Please do not discard. Maybe wireless devices have an impact on the environment
so please do not arbitrarily discarded.
The device is restricted to indoor use only when oparating in the 5150 to 5350 Mhz
frequency range.

SC20-W_Manual_R1.0 Confidential / Released 7 / 41
2Product Concept
2.1. General Description
SC20-W is a Smart Wi-Fi module based on Qualcomm platform and Android operating system, and
provides industrial grade performance. It supports Wi-Fi 802.11a/b/g/n and BT4.1 LE standards for
short-range wireless communication. The module also offers multiple audio and video input/output
interfaces as well as abundant GPIO interfaces.
The following table shows the supported Wi-Fi/BT standards and frequency range of SC20-W.
Table 1: SC20-W Frequency Bands
Type
Frequency Range
IEEE 802.11b/g/n
2412-2462MHz
IEEE 802.11a/n
5180~5825MHz
BT4.1 LE
2402-2480MHz
SC20-W is an SMD type module, which can be embedded into applications through its 210-pin pads
including 146 LCC signal pads and 64 other pads. With a compact profile of 40.5mm ×40.5mm ×2.8mm,
SC20-W can meet almost all requirements for M2M applications such as CPE, wireless POS, smart
metering, automotive, digital signage, alarm panel, security and industrial PDA.

SC20-W_Manual_R1.0 Confidential / Released 8 / 41
2.2. Key Features
The following table describes the detailed features of SC20-W module.
Table 2: SC20-W Key Features
Feature
Details
Applications Processor
ARM Cortex-A7 microprocessor cores (quad-core) up to 1.1 GHz
512KB L2 cache
Modem DSP
QDSP6 v5 core up to 691.2MHz
768KB L2 cache
Memory
8GB EMMC+8Gb LPDDR3
Operating System
Android OS 5.1
Power Supply
Supply voltage: 3.5V~4.2V
Typical supply voltage: 3.8V
WLAN Features
2.4G and 5G double frequency bands
Support 802.11a/b/g/n standards, with max. data rate up to 150Mbps
Support AP mode
Bluetooth Feature
BT4.1 LE
AT Commands
3GPP TS 27.007 and 3GPP TS 27.005 AT commands as well as Quectel
enhanced AT commands
LCM Interface
4-lane MIPI_DSI, up to 1.5Gbps for each lane
Support WVGA(2-lane MIPI_DSI), up to 720p (4-lane MIPI_DSI)
24-bit color depth
Camera Interface
Use MIPI_CSI, up to 1.5Gbps per lane
Support two cameras:
2-lane MIPI_CSI for rear camera, max. pixel up to 8MP
1-lane MIPI_CSI for front camera, max. pixel up to 2MP
Audio Interface
Audio input
2 groups of analog microphone input, integrate internal bias voltage
Audio output
Class AB stereo headphone output
Class AB earpiece differential output
Class D speaker differential amplifier output
USB Interface
Compliant with USB 2.0 specification; the data transfer rate can reach up to
480Mbps
Used for AT command communication, data transmission, software
debugging and firmware upgrade
Support USB OTG (Need additional 5V power supply chip)

SC20-W_Manual_R1.0 Confidential / Released 9 / 41
USB Driver: Support Windows XP, Windows Vista, Windows 7, Windows 8,
Windows CE5.0/6.0*, Linux 2.6/3.0, Android 2.3/4.0/4.2
UART Interface
2 UART interfaces:
4-wire UART interface with RTS and CTS hardware flow control
2-wire UART interface for software debugging
Baud rate up to 4Mbps
SDIO Interface
Support SD3.0, 4-bit SDIO
Support hot plug
I2C Interface
3 groups of I2C, with max. data rate up to 3.4Mbps (High Speed)
Used for peripherals such as camera, sensor, touch panel, etc.
ADC Interface
Support 3 ADC interfaces;
Used for input voltage sense, battery temperature detection and general
purpose ADC
Real Time Clock
Supported
Physical Characteristics
Size: (40.5±0.15)mm × (40.5±0.15)mm × (2.8±0.2) mm
Interface: LCC
Weight: approx. 9.8g
Temperature Range
Operating temperature range: -35°C~+65°C 1)
Extended temperature range : -40°C~+75°C 2)
Firmware Upgrade
Over USB interface
RoHS
All hardware components are fully compliant with EU RoHS directive
1. 1) Within operation temperature range, the module is IEEE compliant.
2. 2) Within extended temperature range, the module remains the ability for data transmission. There
is no unrecoverable malfunction. There are also no effects on radio spectrum and no harm to radio
network. Only one or more parameters like Pout might reduce in their value and exceed the specified
tolerances. When the temperature returns to the normal operating temperature levels, the module
will meet IEEE compliant again.
3. “*”means under development.
NOTE：

SC20-W_Manual_R1.0 Confidential / Released 10 / 41
2.3. Functional Diagram
The following figure shows a block diagram of SC20-W and illustrates the major functional parts.
Power management
Radio frequency
Baseband
LPDDR3+EMMC flash
Peripheral interface
-- USB interface
-- UART interface
-- SDIO interface
-- I2C interface
-- ADC interface
-- LCM (MIPI) interface
-- Touch Panel interface
-- Camera (MIPI) interface
-- Audio interface
Figure 1: Functional Diagram

SC20-W_Manual_R1.0 Confidential / Released 11 / 41
2.4. Evaluation Board
In order to help you to develop applications with SC20-W, Quectel supplies the evaluation board (Smart-
EVB), RS-232 to USB cable, USB data cable, power adapter, earphone, antenna and other peripherals to
control or test the module. For more details, please refer to document [1].

SC20-W_Manual_R1.0 Confidential / Released 12 / 41
3Application Interfaces
3.1. General Description
SC20-W is equipped with 146-pin 1.0mm pitch SMT pads plus 64-pin ground pads and reserved pads
that can be embedded into wireless application platforms. The following chapters provide the detailed
description of pins/interfaces listed below.
Power supply
VRTC interface
LCM interface
TP interface
Camera interface
Audio interface
USB interface
UART interface
SDIO interface
I2C interface
ADC interface

SC20-W_Manual_R1.0 Confidential / Released 13 / 41
3.2. Pin Assignment
The following figure shows the pin assignment of SC20-W module.
GND
USB OTHERS
102
GND GND
GND
SDC2 GPIO ANT
UART
AUDIO CAMERA
MIPI_CSI1_LN0P
MIPI_CSI1_LN0N
MIPI_CSI1_CLKP
MIPI_CSI1_CLKN
MIPI_CSI0_LN1P
MIPI_CSI0_LN1N
MIPI_CSI0_LN0P
MIPI_CSI0_LN0N
MIPI_CSI0_CLKP
MIPI_CSI0_CLKN
MIPI_DSI_LN3P
MIPI_DSI_LN3N
MIPI_DSI_LN2P
MIPI_DSI_LN2N
MIPI_DSI_LN1P
MIPI_DSI_LN1N
MIPI_DSI_LN0P
MIPI_DSI_LN0N
MIPI_DSI_CLKP
MIPI_DSI_CLKN
LCD_TE
TP
LCD_RST
VBAT_BB
VBAT_BB
GND
MIC1P
MIC_GND
MIC2P
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
101
100
99
98
97
96
95
103
102
105
104
107
106
109
108
110
112
111
114
113
116
115
118
117 119
121
120
123
122
125
124
126 128
127
130
129
132
131
133 135
134
137
136
139
138
140 142
141
144
143
146
145
148
147
152
151
154
167
169
168
170
165
164
166
163
180
181 188
189
158 156
157
155
160
161
159
162
184
186
185
175 177
176
178
173
172
174
171
193
192
208
209
201
202
200
206
203
GND
EARP
EARN
GND
USB_VBUS USB_VBUS
GND GND
HS_DET
HPH_L
HPH_GND
HPH_R
GND
VBAT_THERM
VBAT_SNS
GND GND
ADC
CHARGE_SEL
LDO17_2V85
VRTC
LDO6_1V8
GPIO_17 GPIO_16 GND GND
GPIO_8 GPIO_9
GPIO_10 GPIO_11 GPIO_95
PWRKEY
GPIO_99 GPIO_58
LDO5_1V8
GPIO_96
GPIO_65
GPIO_36
GPIO_94
GPIO_98
GPIO_0
GPIO_110
GPIO_97
GPIO_68
GPIO_69
GPIO_89
GPIO_88
GPIO_92
GPIO_31
KEY_VOL_DOWN
KEY_VOL_UP
UART2_TXD
UART2_RXD
SENSOR_I2C_SDA
SENSOR_I2C_SCL
GPIO_32
GND
GND
GND
GND
CAM_I2C_SDA
CAM_I2C_SCL
CAM1_PWD
CAM1_RST
CAM0_PWD
CAM0_RST
GND
GND
ANT_WIFI/BT
CAM1_MCLK
CAM0_MCLK
SPKP
SPKN
GND
USB_DM
USB_DP
GND
USB_ID
GND
VIB_DRV
PWM
TP_INT
TP_RST
SD_LDO12
GPIO_23
UART1_TXD
UART1_RXD
UART1_CTS
UART1_RTS
SD_LDO11
SD_CLK
SD_CMD
SD_DATA0
SD_DATA1
SD_DATA2
SD_DATA3
SD_DET
USB_BOOT
TP_I2C_SCL
TP_I2C_SDA
LCM POWER
179
182
195
196
197
198 187
190
205
204
207 191
194
210
149
150
153
199
183
RESERVED
Figure 2: Pin Assignment (Top View)

SC20-W_Manual_R1.0 Confidential / Released 14 / 41
3.3. Power Supply
SC20-W provides two VBAT pins dedicated to connection with the external power supply. The two
VBAT_BB pins are used for module baseband part. The power supply range of the module is 3.5V~4.2V,
and the recommended value is 3.8V.
3.4. Turn on and off Scenarios
3.4.1. Turn on Module Using the PWRKEY
The module can be turned on by driving PWRKEY pin to a low level for at least 1.6s. PWRKEY pin is
pulled to 1.8V internally. It is recommended to use an open drain/collector driver to control the PWRKEY.
A simple reference circuit is illustrated in the following figure.
Turn on pulse
PWRKEY
4.7K
47K
≥1.6s
R1
R2
Q1
Figure 3: Turn on the Module Using Driving Circuit
The other way to control the PWRKEY is using a button directly. A TVS component is indispensable to be
placed nearby the button for ESD protection. A reference circuit is shown in the following figure.
PWRKEY
S1
Close to S1
TVS
Figure 4: Turn on the Module Using Keystroke

SC20-W_Manual_R1.0 Confidential / Released 15 / 41
The turn on scenario is illustrated in the following figure.
VBAT
PWRKEY
>1.6s
Others
1
LDO5_1V8
30s
LDO6_1V8
173ms
173.5ms
438ms
LDO17_2V85
Active
Figure 5: Timing of Turning on Module
Make sure that VBAT is stable before pulling down PWRKEY pin. The recommended time between them
is no less than 30ms. PWRKEY pin cannot be pulled down all the time.
3.4.2. Turn off Module
Set the PWRKEY pin low for at least 1s, and then choose to turn off the module when the prompt window
comes up.
The other way to turn off the module is to drive PWRKEY to a low level for at least 8s. The module will
execute forced shutdown. The forced power-down scenario is illustrated in the following figure.
VBAT
PWRKEY
Others
>8s
Power down
NOTE:

SC20-W_Manual_R1.0 Confidential / Released 16 / 41
Figure 6: Timing of Turning off Module
3.5. VRTC Interface
The RTC (Real Time Clock) can be powered by an external power source through VRTC when the
module is powered down and there is no power supply for the VBAT. The external power source can be
capacitor, rechargeable battery or non-rechargeable battery according to application demands. The
following are some reference circuit designs when an external battery or capacitor is utilized for powering
RTC.
If RTC is ineffective, it can be synchronized when the module starts data connection after power on.
Rechargeable
Backup Battery
Module
RTC
Core
VRTC
Figure 7: RTC Powered by Rechargeable Battery
Large
Capacitance
Capacitor
Module
RTC
Core
VRTC
C
Figure 8: RTC Powered by Capacitor
2.0~3.25V input voltage range and 3.0V typical value for VRTC. When VBAT is disconnected, the
average consumption is 5uA.
When powered by VBAT, the RTC error is 50ppm. When powered by VRTC, the RTC error is
200ppm.
If the rechargeable battery is used, the ESR of the battery should be less than 2K, and it is
recommended to use the MS621FE FL11E of SEIKO.
If a large capacitance capacitor is selected, it is recommended to use a 100uF capacitor with low

SC20-W_Manual_R1.0 Confidential / Released 17 / 41
ESR. The capacitor is able to power the real-time clock for 45 seconds.
3.6. Power Output
SC20-W supports output of regulated voltages for peripheral circuits.
Table 3: Power Description
Pin Name
Voltage Range (V)
Default Voltage (V)
Driving Current (mA)
IDLE
LDO5_1V8
1.75~3.337
1.8
20
KEEP
LDO6_1V8
1.75~3.337
1.8
100
No output
LDO17_2V85
1.75~3.337
2.85
300
No output
SD_LDO12
1.75~3.337
2.95
50
SD_LDO11
1.75~3.337
2.95
600
3.7. Battery Charge and Management
SC20-W module can recharge over-discharged batteries. The battery charger in SC20-W module
supports trickle charging, constant current charging and constant voltage charging modes, which
optimizes the charging procedure for Li-ion batteries.
Trickle charging: There are two steps in this mode. When the battery voltage is below 2.8V, a 90mA
trickle charging current is applied to the battery. When the battery voltage is charged up and is
between 2.8V and 3.2V, the charging current can be set to 450mAmaximally.
Constant current mode (CC mode): When the battery is increased to between 3.2V and 4.2V, the
system will switch to CC mode. The maximum charging current is 1.44A when adapter is used for
battery charging; and the maximum charging current is 450mAwhile USB charging.
Constant voltage mode (CV mode): When the battery voltage reaches the final value 4.2V, the
system will switch to CV mode and the charging current will decrease gradually. When the battery
level reaches 100%, the charging is completed.
SC20-W module supports battery temperature detection in the condition that the battery integrates a
thermistor (47K 1%, B4050 NTC thermistor by default; SDNT1608X473F4050FTF of SUNLORD is
recommended) and the thermistor is connected to VBAT_THERM pin. The default temperature range is
from -3.0 to 48.5°C . If VBAT_THERM pin is not connected, there will be malfunctions such as battery
charging failure, battery level display error, etc.

SC20-W_Manual_R1.0 Confidential / Released 18 / 41
A reference design for battery charging circuit is shown as below.
GND
VBAT_SNS
VBAT_THERM
VBAT
0R
100uF
NTC
VBAT
1uF
ESD ESD
1
2
3
USB_VBUS
Adapter or USB
Module
Battery
GND
C1 C2
R1
D1 D2
Figure 9: Reference Design for Battery Charging Circuit
Mobile devices such as mobile phones and handheld POS systems are powered by batteries. When
different batteries are utilized, the charging and discharging curve has to be modified correspondingly so
as to achieve the best effect.
If thermistor is not available in the battery, or adapter is utilized for powering module, then there is only a
need for VBAT and GND connection. In this case, the system may mistakenly judge that the battery
temperature is abnormal, which will cause battery charging failure. In order to avoid this, VBAT_THERM
should be connected to GND with a 47KΩ resistor. If VBAT_THERM is unconnected, the system will be
unable to detect the battery, making battery cannot be charged.
VBAT_SNS pin must be connected. Otherwise, the module will have abnormalities in voltage detection,
as well as associated power on/off and battery charging/discharging issues.
3.8. USB Interface
SC20-W contains one integrated Universal Serial Bus (USB) transceiver which complies with the USB 2.0
specification and supports high speed (480 Mbps) and full speed (12 Mbps) modes. The USB interface is
used for AT command communication, data transmission, software debugging and firmware upgrade.

SC20-W_Manual_R1.0 Confidential / Released 19 / 41
4Wi-Fi and BT
SC20-W module provides a shared antenna interface ANT_WIFI/BT for Wi-Fi and Bluetooth (BT)
functions. The interface impedance is 50Ω. External antennas such as dipole antenna can be connected
to the module via the interface, so as to achieve Wi-Fi and BT functions.
4.1. Wi-Fi Overview
SC20-W module supports 2.4G and 5G double-bands WLAN wireless communication based on IEEE
802.11 a/802.11 b/ 802.11g/ 802.11n standard protocols. The maximum data rate is up to 150 Mbps.
The features are as below:
Support Wake-on-WLAN (WoWLAN)
Support ad hoc mode
Support WAPI SMS4 hardware encryption
SupportAP mode
Support Wi-Fi Direct
Support MCS 0-7 for HT20 and HT40
4.2. BT Overview
SC20-W module supports BT4.1 (BR/EDR+BLE) specification, as well as GFSK, 8-DPSK, π/4-DQPSK
modulation modes.
Maximally support up to 7 wireless connections.
Maximally support up to 3.5 piconets at the same time.
Support one SCO (Synchronous Connection Oriented) or eSCO connection.
The BR/EDR channel bandwidth is 1MHz, and can accommodate 79 channels. The BLE channel
bandwidth is 2MHz, and can accommodate 40 channels.