Neoway S720 User guide

Hardware User Guide

Issue 1.0

S720 Hardware User Guide

Copyright

ii

No part of this document may be reproduced or transmitted in any form or by any means without prior written

consent of Neoway Technology Co., Ltd.

is the trademark of Neoway Technology Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective

holders.

Notice

This document provides guide for users to use S720.

This document is intended for system engineers (SEs), development engineers, and test engineers.

THIS GUIDE PROVIDES INSTRUCTIONS FOR CUSTOMERS TO DESIGN THEIR APPLICATIONS.

PLEASE FOLLOW THE RULES AND PARAMETERS IN THIS GUIDE TO DESIGN AND COMMISSION.

NEOWAY WILL NOT TAKE ANY RESPONSIBILITY OF BODILY HURT OR ASSET LOSS CAUSED BY

IMPROPER OPERATIONS.

THE INFORMATION IN THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE DUE TO

PRODUCT VERSION UPDATE OR OTHER REASONS.

EVERY EFFORT HAS BEEN MADE IN PREPARATION OF THIS DOCUMENT TO ENSURE ACCURACY

OF THE CONTENTS, BUT ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS

DOCUMENT DO NOT CONSTITUTE A WARRANTY OF ANY KIND, EXPRESS OR IMPLIED.

Neoway provides customers complete technical support. If you have any question, please contact your

account manager or email to the following email addresses:

[email protected]

Website: http://www.neoway.com

 
S720 Hardware User Guide 
Contents 
 
Copyright © Neoway Technology Co., Ltd. All rights reserved. 
iii 
 
Contents 
Safety Recommendations ....................................................................... 11 
About S720 .............................................................................................. 12 
1 Product Overview ....................................................................................................................... 12 
2 Block Diagram ............................................................................................................................ 13 
3 Basic Features ........................................................................................................................... 14 
Reference Standards ............................................................................... 17 
Module Pins ............................................................................................. 18 
1 Pin Layout .................................................................................................................................. 18 
2 Pin Description ........................................................................................................................... 19 
Application Interfaces .............................................................................. 31 
1 Power Interfaces ........................................................................................................................ 31 
1.1 VBAT .................................................................................................................................. 31 
1.2 Charging and Battery ........................................................................................................ 35 
1.3 Power Output ..................................................................................................................... 37 
1.4 VRTC ................................................................................................................................. 39 
2 Control Interfaces ....................................................................................................................... 39 
2.1 Startup ............................................................................................................................... 40 
2.2 Shutdown ........................................................................................................................... 42 
2.3 Volume up/down ................................................................................................................ 43 
3 Peripheral Interfaces .................................................................................................................. 44 
3.1 USB ................................................................................................................................... 44 
3.2 UART ................................................................................................................................. 46 
3.3 USIM .................................................................................................................................. 50 
3.4 SD ...................................................................................................................................... 52 
3.5 I2C ..................................................................................................................................... 54 
4 Audio Interface ........................................................................................................................... 55 
4.1 Analog Audio Input............................................................................................................. 55 
4.2 Analog Audio Output .......................................................................................................... 56 
4.3 Headphone ........................................................................................................................ 58 
5 Video Interfaces ......................................................................................................................... 60 
5.1 LCD ................................................................................................................................... 60 
5.2 TP ...................................................................................................................................... 64 
5.3 Camera .............................................................................................................................. 65 
6 RF Interface ................................................................................................................................ 68 
6.1 ANT_MAIN/ANT_DRX Antenna Interface ......................................................................... 68 
6.2 ANT_WIFI/BT Antenna Interface ....................................................................................... 70 
6.3 ANT_GNSS Antenna Interface .......................................................................................... 70 
6.3.1 Reference Design of Active GNSS Antenna .................................................................. 70 
6.3.2 Reference Design of Passive GNSS Antenna ............................................................... 71 

S720 Hardware User Guide

Contents

iv

5.6.4 Antenna Assembling .......................................................................................................... 72

5.7 GPIO Interfaces ......................................................................................................................... 75

5.8 Multi-Function Interfaces ............................................................................................................ 76

5.9 Other Interfaces ......................................................................................................................... 77

5.9.1 ADC ................................................................................................................................... 77

5.9.2 USB_BOOT ....................................................................................................................... 78

5.9.3 Motor Driver ....................................................................................................................... 78

6 Electrical Characteristics and Reliability .................................................. 80

6.1 Electrical Characteristics ............................................................................................................ 80

6.2 Temperature Characteristics ...................................................................................................... 80

6.3 ESD Protection ........................................................................................................................... 81

7 RF Characteristics ................................................................................... 82

7.1 Operating Bands ........................................................................................................................ 82

7.2 TX Power and RX Sensitivity ..................................................................................................... 83

7.3 GNSS Technical Parameters ..................................................................................................... 83

7.4 WLAN/BT Characteristics .......................................................................................................... 84

8 Mechanical Characteristics ...................................................................... 85

8.1 Dimensions ................................................................................................................................. 85

8.2 Label ........................................................................................................................................... 86

8.3 Packing ....................................................................................................................................... 86

8.3.1 Tray .................................................................................................................................... 86

8.3.2 Moisture ............................................................................................................................. 88

9 Mounting .................................................................................................. 89

9.1 PCB Package ............................................................................................................................. 89

9.2 Application Foot Print ................................................................................................................. 90

9.3 Stencil ......................................................................................................................................... 90

9.4 Solder Paste ............................................................................................................................... 91

9.5 SMT Oven Temperature Profile .................................................................................................. 91

Abbreviations ........................................................................................... 93

S720 Hardware User Guide

Table of Figures

v

Table of Figures

Figure 2-1 Block diagram ................................................................................................................. 13

Figure 4-1 S720 pin definition (top view) ......................................................................................... 18

Figure 5-1 Power supply recommended design 1 ........................................................................... 32

Figure 5-2 Power supply recommended design 2 ........................................................................... 33

Figure 5-3 Power supply recommended design 3 ........................................................................... 33

Figure 5-4 Power supply recommended design 4 ........................................................................... 34

Figure 5-5 Reference design of the battery connection ................................................................... 37

Figure 5-6 Reference design of the VRTC power supply ................................................................ 39

Figure 5-7 Reference design of startup controlled by a button ........................................................ 40

Figure 5-8 Reference design of startup controlled by an MCU ........................................................ 40

Figure 5-9 Reference design of automatic start once powered up .................................................. 41

Figure 5-10 Startup process ............................................................................................................. 42

Figure 5-11 S720 forcibly shutdown process ................................................................................... 43

Figure 5-12 Reference design of the volume up/down control connection ...................................... 43

Figure 5-13 Reference design of USB Micro interface (with OTG function) connection ................. 45

Figure 5-14 Reference design of UART connection ........................................................................ 46

Figure 5-15 Recommended level conversion circuit 1 ..................................................................... 47

Figure 5-16 Recommended level conversion circuit 2 ..................................................................... 48

Figure 5-17 Recommended level conversion circuit 3 ..................................................................... 49

Figure 5-18 Reference design of the USIM card (with hot-swap) interface ..................................... 50

Figure 5-19 Reference design of the USIM card (without hot-swap) interface ................................ 51

Figure 5-20 Reference design of the SD card (with hot-swap) interface ......................................... 53

Figure 5-21 Reference design of the I2C connection ...................................................................... 54

Figure 5-22 Main/auxiliary sisonic MIC (MEMS) reference design .................................................. 55

Figure 5-23 Main/auxiliary electret MIC (ECM) reference design .................................................... 56

Figure 5-24 Recommended design of the EAR/SPK interface ........................................................ 57

Figure 5-25 Reference design of the headphone circuit (CTIA) ...................................................... 59

S720 Hardware User Guide

Table of Figures

vi

Figure 5-26 Headphone interface diagram ...................................................................................... 59

Figure 5-27 LCD reference design ................................................................................................... 62

Figure 5-28 Reference design of the backlight ................................................................................ 63

Figure 5-29 TP interface example .................................................................................................... 65

Figure 5-30 Reference design of 2-lane camera interface connection ............................................ 67

Figure 5-31 L-type network .............................................................................................................. 68

Figure 5-32 T-type network .............................................................................................................. 69

Figure 5-33 π-type network .............................................................................................................. 69

Figure 5-34 Recommended RF PCB design ................................................................................... 70

Figure 5-35 GNSS RF structure ....................................................................................................... 70

Figure 5-36 GNSS active antenna reference design ....................................................................... 71

Figure 5-37 Reference design of passive GNSS antenna ............................................................... 72

Figure 5-38 Murata RF connector encapsulation specifications ...................................................... 73

Figure 5-39 RF cable connections ................................................................................................... 73

Figure 5-40 Antenna layout .............................................................................................................. 74

Figure 5-41 Layout around the antenna ........................................................................................... 74

Figure 5-42 Reference design of USB force download.................................................................... 78

Figure 5-43 Reference design of the motor interface ...................................................................... 79

Figure 8-1 S720 Top and side view dimensions (unit: mm) ............................................................. 85

Figure 8-2 S720 label ....................................................................................................................... 86

Figure 8-3 Tray package .................................................................................................................. 87

Figure 8-4 Tray ................................................................................................................................. 88

Figure 9-1 Bottom view of S720 package (unit: mm) ....................................................................... 89

Figure 9-2 Top view of S720 package (unit: mm) ............................................................................ 90

Figure 9-3 Oven temperature profile ................................................................................................ 91

S720 Hardware User Guide

Table of Tables

vii

Table of Tables

Table 2-1 Variants and frequency bands .......................................................................................... 12

Table 2-2 Basic features of S720 ..................................................................................................... 14

Table 4-1 IO definition and DC characteristics ................................................................................. 19

Table 4-2 Pin description .................................................................................................................. 20

Table 5-1 Charging interface pinout ................................................................................................. 36

Table 5-2 Power output description .................................................................................................. 37

Table 5-3 Control interface definitions .............................................................................................. 39

Table 5-4 USB interface description ................................................................................................. 44

Table 5-5 UART interface pinouts .................................................................................................... 46

Table 5-6 USIM interface pinouts ..................................................................................................... 50

Table 5-7 SD interface pinouts ......................................................................................................... 52

Table 5-8 I2C interface pinouts ........................................................................................................ 54

Table 5-9 Analog audio input interface pinouts ................................................................................ 55

Table 5-10 Analog audio output interface pinouts ............................................................................ 56

Table 5-11 Headphone interface pinouts.......................................................................................... 58

Table 5-12 LCD interface pinouts ..................................................................................................... 60

Table 5-13 TP interface pinouts ....................................................................................................... 64

Table 5-14 Camera interface pinouts ............................................................................................... 65

Table 5-15 RF antenna interface pinouts ......................................................................................... 68

Table 5-16 GPIO interface description ............................................................................................. 75

Table 5-17 Pin definition description ................................................................................................ 76

Table 5-18 ADC interface pinout ...................................................................................................... 78

Table 5-19 USB_BOOT interface description .................................................................................. 78

Table 5-20 Motor driver interface description ................................................................................... 78

Table 6-1 S720 operating conditions ................................................................................................ 80

Table 6-2 S720 temperature characteristics .................................................................................... 80

Table 6-3 S720 ESD protection characteristics ................................................................................ 81

S720 Hardware User Guide

Table of Tables

viii

Table 7-1 S720 operating bands ...................................................................................................... 82

Table 7-2 S720 TX power and RX sensitivity description ................................................................ 83

Table 7-3 GNSS Technical parameters ............................................................................................ 83

Table 7-4 S720 WLAN/BTTX power and RX sensitivity ................................................................... 84

S720 Hardware User Guide

About This Document

ix

About This Document

Scope

This document is applicable to the S720 series.

It defines the features, indicators, and test standards of the S720 module and provides reference for

the hardware design of each interface.

Audience

This document is intended for system engineers (SEs), development engineers, and test engineers.

Change History

Issue

Change

Changed By

1.0

Initial draft

Yin Xiaoliang

Conventions

Symbol

Indication

Indicates danger or warning. This information must be followed. Otherwise, a

catastrophic module or user device failure or bodily injury may occur.

Indicates caution. This symbol alerts the user to important points about using the

module. If these points are not followed, the module or user device may fail.

Indicates instructions or tips. This symbol provides advices or suggestions that

may be useful when using the module.

S720 Hardware User Guide

About This Document

x

Category

Band

GNSS

Wi-Fi

BT

CA

China

Cat 4

LTE-FDD: B1/B3/B5/B8

LTE-TDD:

B34/B38/B39/B40/B41

WCDMA: B1/B5/B8

GSM: 900/1800MHz

Supported

EA

Europe

Cat 4

LTE-FDD:

B1/B3/B5/B7/B8/B20/B28

LTE-TDD: B38/B40/B41

WCDMA: B1/B5/B8

GSM: 850/900/1800MHz

Supported

S720 runs Android 10 OS and has dimensions of (40.50±0.1) mm × (40.50±0.1) mm × (2.85±0.2) mm.

There are 274 pins on the module and their pads are introduced in 146-pin LCC + 128-pin LGA package.

Applicable to smart POS, smart gateway, video surveillance, driving recorder, DVR, vehicle payment

equipment, law enforcement equipment, smart handheld device, smart wearable device, vending

machine, logistics cabinet and other terminals, S720 can meet the requirements for high speed and

multimedia functions in industrial and consumer applications.

S720 Hardware User Guide

Chapter 2 About S720

13

2.2 Block Diagram

S720 consists of the following functionality units:

⚫ Baseband

⚫ Crystal

⚫ Power management unit

⚫ LPDDR3 + eMMC memory

⚫ Digital interfaces (USB/USIM/UART/I2C/Camera/SDIO3.0/LCD/TP)

⚫ Analog interfaces (Audio/ADC)

⚫ RF section (2G/3G/4G antenna/GNSS antenna/2.4G Wi-Fi&Bluetooth antenna)

Figure 2-1 Block diagram

RF front-end module

Transceiver

Baseband

eMCP

LPDDR3

eMMC

USB2.0 USIM*2 CAM*2 I2C UART GPIOsSDIO

ANT_DIV ANT_GNSSANT_MAIN ANT_WIFI/BT

VBAT

PWRKEY

ADC

26 MHz

TSX

26 MHz

32 kHz

SAW

Audio

TP LCM

Power

manager

26 MHz

LAN

32 kHz

VDD_SDIO

VDD_SD

USIM1_VDD

USIM2_VDD

VDD1V85

VDD28

VDDCAMIO

VDDCAMA

VDDCAMCORE

VDDCAMMOT

SAW

Diplexer

S720 Hardware User Guide

Chapter 2 About S720

14

2.3 Basic Features

Table 2-2 Basic features of S720

Parameter

Description

Physical features

⚫ Dimensions: (40.50±0.1) mm × (40.50±0.1) mm × (2.85±0.2) mm

⚫ Weight: about 10.4 g

⚫ Package: 146-pin LCC + 128-pin LGA

Temperature ranges

Operating: -30°C to +75°C

Storage: -40°C to +90°C

Operating voltage (DC)

VBAT: 3.5 V- 4.2 V, typical value: 3.8 V

Operating current (DC)

Sleep mode1): TBD

Standby mode2): TBD

Certification approval

CCC*, SRRC*

Platform Features

Application processor

Quad-core 64-bit ARM Cortex-A53 processor, main frequency up to

1.4 GHz.

GPU

Mali-T820 MP1 GPU, frequency up to 680 MHz

Operating System

Android 10

Storage

1 GB LPDDR3 + 8 GB eMMC (default)

2 GB LPDDR3 + 16 GB eMMC (optional)

RF Characteristics

Wireless rate

GPRS: Max 107 kbps (DL)/Max 85.6 kbps (UL)

EDGE: Max 296 kbps (DL)/Max 236.8 kbps (UL)

WCDMA: HSDPA, Max 42 Mbps (DL)/Max 11.2 Mbps (UL)

FDD-LTE: Cat4, Max 150 Mbps (DL)/Max 50 Mbps (UL)

TDD-LTE: Cat4, Max 130 Mbps (DL)/Max 35 Mbps (UL)

Transmit power

EGSM900: 33 dBm+1/-3 dB (Power Class 4)

DCS1800: 30 dBm+1/-3 dB (Power Class 1)

EDGE 900 MHz: 27 dBm±3 dB (Power Class E2)

EDGE 1800 MHz: 26 dBm±3 dB (Power Class E2)

WCDMA: 24 dBm+1/-3 dB (Power Class 3)

FDD-LTE: 23 dBm+1/-3 dB (Power Class 3)

TDD-LTE: 23 dBm+1/-3 dB (Power Class 3)

Satellite positioning

GPS/BDS/GLONASS

Antenna Interfaces

2G/3G/4G antenna, 4G diversity reception antenna, GNSS antenna,

and 2.4G Wi-Fi/BT antenna

All of each has a characteristic impedance of 50 Ω.

S720 Hardware User Guide

Chapter 2 About S720

15

Multimedia

Display interface

One 4-lane MIPI_DSI interface, with a maximum speed of 1.5

Gbps/lane

Resolution up to HD+(1440x720)@60fps

Camera interfaces

Two MIPI_CSI interfaces, with a maximum speed of 1.5 Gbps/lane

⚫ 2-lane MIPI used by the rear camera, resolution up to 8 MP

⚫ 1-lane MIPI used by the front camera, resolution up to 2 MP

Video encoding and

decoding

Encoding: H.264/H.263/MPEG4 - 1080p@30fps

Decoding: H.264/H.263/MPEG4/VP8 - 1080p@30fps

Graphics engine

Mali-T820 MP1 GPU, 3D high-performance graphics engine with a

frequency up to 680 MHz

Audio

Audio format

GSM-FR, GSM-EFR, GSM-HR, AMR, AMR-NB, AMR-WB, EVS-NB,

EVS-WB, EVS-SWB, MP3, AAC, AAC+, PCM

Audio input

Three MICs, one main MIC, one auxiliary MIC, one headphone MIC

Audio output

Class AB stereo headphone output

Class AB differential earpiece output

Class D differential loudspeaker amplifier output

Connection Features

UART

One 4-pin UART interface supporting hardware flow control. Two 2-

pin UART interfaces, of which the Debug UART is only used for

commissioning. Their frequency can reach up to 2 Mbit/s.

I2C

Four I2C interfaces, used in camera, touch panel, sensor, and other

peripherals

USIM

Two (U)SIM interfaces

⚫ Supports (U)SIM card: 1.8 V and 3.0 V

⚫ Supports duals card dual standby

USB

One high-speed USB 2.0 interface

Supports USB 2.0 high-speed mode and USB OTG; can be used for

data transmission, software debug, and software update

SDIO

One SDIO interface, supporting SD3.0 protocol and 1.8 V/3.0 V SD

card

ADC

One ADC interface supports a sampling resolution up to 12 bits;

voltage detection range: 0.1 V - 1.2 V.

WLAN

Supports AP mode and STA mode

2.4 GHz frequency band, supporting 802.11 b/g/n and the rate up to

72.2 Mbps

Bluetooth

BLE 4.2 or earlier version

S720 Hardware User Guide

Chapter 2 About S720

16

Debug Interface

Forcible download mode

Forcible USB startup control

* indicates in development.

“Sleep mode1)", the module enters flight mode and disables all RF functions.

“Idle mode2)”, the module enters a low power consumption state. In this state, the peripheral interface of the

module is disabled, but the radio frequency (RF) function is normal. The module will exit the idle mode when

there is an incoming call or text message, and will re-enter the idle mode when the incoming call or voice call

ends.

S720 Hardware User Guide

Chapter 3 Reference Standards

17

3 Reference Standards

S720 is designed by referring to the following standards:

⚫ 3GPP TS 36.521-1 V10.0.0 User Equipment(UE) conformance specification; Radio transmission

and reception

⚫ 3GPP TS 21.111 V9.0.0 USIM and IC card requirements

⚫ 3GPP TS 31.102 V9.19.0 Characteristics of the Universal Subscriber Identity Module (USIM)

application

⚫ 3GPP TS 31.111 V9.12.2 Universal Subscriber Identity Module (USIM) Application Toolkit

(USAT)

S720 Hardware User Guide

Chapter 4 Module Pins

18

4 Module Pins

There are 274 pins on S720 and their pads are introduced in 146-pin LCC + 128-pin LGA package. It

supports interfaces including USB, MIPI, SDIO, UART, ADC, I2C and so on.

4.1 Pin Layout

The following figure shows the pad layout of S720.

Figure 4-1 S720 pin definition (top view)

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

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

38

146

145

144

124

123

122

121

120

119

118

117

116

115

114

113

112

111

143

142

141

140

139

138

137

136

135

134

133

132

131

130

129

128

127

126

125

110

109

108

107

106

105

104

103

102

101

100

99

98

97

96

95

94

93

92

91

90

89

88

87

86

85

84

83

82

81

80

79

78

77

76

75

74

147

187

222

221

220

219

218

217

216

215

214

176

148

188

223

250

249

248

247

246

245

244

213

175

186

185

184

183

182

181

180

179

178

177

150

190

225

252

271

265

242

211

173

151

191

226

253

264

241

210

172

149

189

224

251

270

269

268

267

266

243

212

174

153

193

228

255

262

239

208

170

154

194

229

256

257

258

259

260

261

238

207

169

152

192

227

254

263

240

209

171

156

196

197

198

199

200

201

202

203

204

205

167

157

158

159

160

161

162

163

164

165

166

155

195

230

231

232

233

234

235

236

237

206

168

274

272

273

POWER GND UART OTHER ANT RESERVED USB

AUDIO SD CAMERA LCM GPIO

TP SIM

S720 Hardware User Guide

Chapter 4 Module Pins

19

4.2 Pin Description

The following table lists the IO definitions and DC characteristics.

Table 4-1 IO definition and DC characteristics

IO Type

B

Digital input/output, CMOS logic level

DO

Digital output, CMOS logic level

DI

Digital input, CMOS logic level

PO

Power output

PI

Power input

AO

Analog output

AI

Analog input

AIO

Analog input/output

Level Feature

Interface type

Power domain

Logic level

USIM

P1: 1.8 V/3.0 V self-adaptive

1.8 V level feature:

VIH =0.7*VUSIM~VUSIM

VIL =0V~0.3VUSIM

VOH=0.9*VUSIM~VUSIM

VOL=0V~0.1VUSIM

3V level feature:

VIH =0.7*VUSIM~VUSIM

VIL =0V~0.3VUSIM

VOH=0.9*VUSIM~VUSIM

VOL=0V~0.1VUSIM

SDIO

P2: 1.8 V/3.0 V self-adaptive

1.8 V level feature:

VIH =0.7*VSDIO~VSDIO

VIL =0V~0.3VSDIO

3V level feature:

VIH =0.7*VSDIO~VSDIO

VIL =0V~0.3VSDIO

S720 Hardware User Guide

Chapter 4 Module Pins

20

VOH=0.9*VSDIO~VSDIO

VOL=0V~0.1*VSDIO

VOH=0.9*VSDIO~VSDIO

VOL=0V~0.1*VSDIO

GPIO

P3: 1.85 V

VIH =0.7*VIO~VIO

VIL =0V~0.3VIO

VOH=0.9*VIO~ VIO

VOL=0V~0.1*VIO

Table 4-2 Pin description

Signal

I/O type

Function description

Level feature

Remarks

Power Interfaces

VBAT_BB

1, 2

PI

Power input of the module

baseband

Vmin = 3.5 V

Vnorm = 3.8 V

Vmax = 4.2 V

Providing at least 3 A current to VBAT is

required.

VBAT_RF

145, 146

PI

Power input of the module RF

Vmin = 3.5 V

Vnorm = 3.8 V

Vmax = 4.2 V

VDD1V85

111

PO

1.85 V power output

Vnorm = 1.85 V

Imax = 100 mA

Used only for pull-up or level conversion.

It is always on.

Leave this pin floating if it is not used.

VDD28

129

PO

2.8 V power output

Power supply for LCM and sensor

Vnorm = 2.8 V

Imax = 150 mA

Add a bypass capacitor (1.0 μF- 2.2 μF)

externally when using this pin.

It is always on to supply power.

Leave this pin floating if it is not used.

VDDCAMIO

125

PO

1.8 V power output

I/O power supply for cameras,

sensors and other peripherals

Vnorm = 1.8 V

Imax = 200 mA

Add a bypass capacitor (1.0 μF- 2.2 μF)

externally when using this pin.

Leave this pin floating if it is not used.

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Neoway S720 User guide

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