lantronix XPICO200 Users Manual
xPico 200 Series
Embedded Wi-Fi® Gateway
Data Sheet
Part Number 900-819a
March 2019
Table of Contents
xPico 200 Series Embedded Wi-Fi
Table of Contents __________________________________________________________ 2
List of Figures _____________________________________________________________ 4
List of Tables ______________________________________________________________ 5
1: Functional Description 6
Overview _________________________________________________________________ 6
Applications _______________________________________________________________ 6
Product Features ___________________________________________________________ 7
2: Hardware and Software Description 8
xPico 200 Block Diagram ___________________________________________________ 10
Software Features _________________________________________________________ 10
3: Pin and Pad Definitions 15
®
Gateway Data Sheet 1
4: Interfaces 21
Ethernet _________________________________________________________________ 21
UART ___________________________________________________________________ 21
USB Host Interface ________________________________________________________ 22
SPI Slave Interface ________________________________________________________ 23
SPI Master Interface _______________________________________________________ 23
Configurable General Purpose I/O Pins (GPIO) __________________________________ 23
System Pins ______________________________________________________________ 24
Strap Pins _______________________________________________________________ 25
5: IEEE 802.11 Wireless Lan Specifications 26
6: Bluetooth Specifications 29
7: Antenna Connection Options 30
8: Electrical Characteristics 31
Recommended Operating Conditions __________________________________________ 31
DC Characteristics – Digital I/O Signals ________________________________________ 31
Dynamic Power Management Modes __________________________________________ 32
Output Power _____________________________________________________________ 34
Input Power ______________________________________________________________ 35
EVM ____________________________________________________________________ 35
RX Sensitivity_____________________________________________________________ 36
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 2
Power, Reset, Wake, Shutdown and Default Timing ______________________________ 36
SPI Slave Timing __________________________________________________________ 38
SPI Master Timing _________________________________________________________ 39
Memory _________________________________________________________________ 40
9: Package Description and Mechanical Footprint 41
Dimensions ______________________________________________________________ 41
Material and Weight ________________________________________________________ 43
10: Product Information Label 44
11: Compliance 45
Labeling of the End Product _________________________________________________ 45
Federal Communication Commission Interference Statement (xPico 240/250) __________ 46
Industry Canada Statement (xPico 240/250): ____________________________________ 47
RoHS, REACH, and WEEE Compliance Statement _______________________________ 52
12: Ordering Information 53
Warranty ________________________________________________________________ 54
Contact Information ________________________________________________________ 54
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 3
List of Figures
Figure 2-1 xPico 240 Module Options ______________________________________________ 9
Figure 2-2 xPico 250 and xPico 270 Module Options __________________________________ 9
Figure 2-3 xPico 200 Block Diagram _____________________________________________ 10
Figure 2-4 Wi-Fi Integration Mode _______________________________________________ 11
Figure 2-5 Wireless Microcontroller Mode __________________________________________ 11
Figure 3-1 xPico 200 Edge Connector Pin & Signal Location ___________________________ 15
Figure 3-2 xPico 200 PCB Interface Pin & Signal Location _____________________________ 17
Figure 8-1 Reset Timing _______________________________________________________ 36
Figure 8-2 Reset to Defaults Timing ______________________________________________ 37
Figure 8-3 Wake Timing _______________________________________________________ 37
Figure 8-4 SPI Slave Timing ____________________________________________________ 38
Figure 8-5 SPI Master Timing ___________________________________________________ 39
Figure 9-1 xPico 200 Embedded Wi-Fi Gateway (On-Module Antenna) __________________ 41
Figure 9-2 xPico 200 Embedded Wi-Fi Gateway (Dual U.FL) __________________________ 41
Figure 9-3 Layout Footprint for xPico 200 Enterprise Wi-Fi IoT Module __________________ 42
Figure 9-4 xPico 200 Edge Connector Footprint Dimensions___________________________ 43
Figure 10-1 xPico 200 Module Label _____________________________________________ 44
Figure 11-1 EU Declaration of Conformity (xPico 240/250) ____________________________ 50
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 4
List of Tables
Table 3-1: xPico 200 Edge Connector Signal Descriptions _________________________ 16
Table 3-2: xPico 200 PCB Interface Signal Descriptions ___________________________ 18
Table 4-1: xPico 200 UART Signal Definitions ___________________________________ 21
Table 4-2: xPico 200 USB Host Interface Signal Definitions _________________________ 22
Table 4-3: xPico 200 SPI Slave Interface Signal Definitions _________________________ 23
Table 4-4: xPico 200 SPI Master Interface Signal Definitions ________________________ 23
Table 4-5: xPico 200 Module GPIO Signal Definitions _____________________________ 24
Table 4-6: xPico 200 Strap Pins ______________________________________________ 25
Table 5-1: xPico 200 Module Radio Specification _________________________________ 26
Table 5-2: 20 MHz Channels _________________________________________________ 26
Table 5-3: 40 MHz Channels _________________________________________________ 28
Table 5-4: Preliminary 80 MHz Channels (xPico 270 only, Preliminary) _______________ 28
Table 6-1: xPico 200 BT Radio Specification (xPico 250/270 only) ___________________ 29
Table 7-1: External Antenna Options __________________________________________ 30
Table 7-2: On-Module Antenna Option _________________________________________ 30
Table 8-1: Recommended Operating Conditions for xPico 200 Module ________________ 31
Table 8-2: DC Characteristics & Digital I/0 Signals ________________________________ 31
Table 8-3: xPico 200 Power Consumption 2.4 Ghz (@3.3V, 25oC), Bluetooth Disabled ___ 32
Table 8-4: xPico 200 Power Consumption 5 Ghz (@3.3V, 25oC), Bluetooth Disabled ____ 33
Table 8-5: xPico 250/270 Power Consumption with Bluetooth Enabled (@3.3V, 25oC) ___ 34
Table 8-6: xPico 200 Module RF Output Power (Wi-Fi Conducted) ___________________ 34
Table 8-7: xPico 200 Module RF Output Power (BT Conducted) _____________________ 34
Table 8-8: xPico 200 Module RF Input Power Wi-Fi 2.4Ghz ________________________ 35
Table 8-9: xPico 200 Module RF Input Power Wi-Fi 5Ghz __________________________ 35
Table 8-10: xPico 200 Module RF Input Power BT ________________________________ 35
Table 8-11: xPico 200 Module Wi-Fi EVM ______________________________________ 35
Table 8-12: xPico 200 Module Rx Sensitivity @ 3.3V input power, +25oC ______________ 36
Table 8-13: Shutdown Pin Timing _____________________________________________ 37
Table 8-14: SPI Slave Timing ________________________________________________ 38
Table 8-15: SPI Master Timing _______________________________________________ 39
Table 9-1: Material and Weight _______________________________________________ 43
Table 10-1: Datamatrix ECC200 Barcode Standard Descriptions ____________________ 44
Table 11-1: Country Certifications (xPico 240/250)________________________________ 45
Table 11-2: Country Transmitter IDs (xPico 240/250) ______________________________ 46
Table 11-3: Europe – EU Declaration of Conformity (xPico 240/250)__________________ 51
Table 12-1: xPico 240 Order Information _______________________________________ 53
Table 12-2: xPico 250 Order Information _______________________________________ 53
Table 12-3: xPico 270 Order Information _______________________________________ 53
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 5
1: Functional Description
Overview
The Lantronix® xPico® 200 series of embedded IoT gateways is one of the smallest and most
highly integrated industrial Wi-Fi
deliver and manage secure connected products without added complexity and risk.
The xPico 200 series delivers always-on dual-band enterprise Wi-Fi, dual-mode Bluetooth
(Bluetooth Classic v2.1+EDR and Bluetooth Low Energy v4.2) as well as Ethernet connectivity
for business-critical assets.
It is a standalone module that does not require an external host processor for the wireless and
network stack. With customer proven TruPort technology that includes production-ready
essential IoT connectivity firmware, cloud-based management and an integrated device
security framework, xPico 200 series delivers a complete network and IoT connectivity offload
solution for any microcontroller.
Device manufacturers can use xPico 200 series as the wireless microcontroller within their
device and focus on the application firmware components while leveraging the integrated
secure connectivity network and cloud service enablement capabilities within the module.
The high performance xPico 200 series is available in different versions
(see Product Features).
With the xPico 200 family, design engineers and system architects can reduce product
development time and deploy their secure connected devices with confidence that their
products will connect and work as expected.
Applications
For applications that need Ethernet and wireless connectivity options, xPico 200 delivers a
compact combo solution without needing to integrate two different network stacks from
different modules or controllers.
®
, Ethernet and Bluetooth® combo solutions, allowing you to
Integrated Bluetooth capability on xPico 250/270 enables gateway functions that need to
aggregate Bluetooth sensor devices or communicate with Bluetooth peripherals and mobile
devices.
Key applications include:
♦ Medical devices
♦ Industrial machines
♦ Retail/POS
♦ Weighing scales
♦ Asset and warehouse management
♦ Environmental monitoring
♦ Transportation and Telematics
The xPico 200 series is designed for applications in a variety of industries where reliability,
extended operating temperature range, and robust wireless connectivity are business-critical.
The xPico 200 series is also particularly well-suited for products with long lifecycles in highly
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 6
regulated industries where the constant change in Wi-Fi technologies and certification would
typically make it difficult or cost prohibitive to incorporate a wireless solution.
Product Features
♦ Dual-band (802.11 a/b/g/n) for high performance industrial Wi-Fi
♦ xPico 270 adds 802.11ac
♦ 2.4 GHz and 5 GHz bands supported
♦ IEEE 802.3 10/100 Mbps Ethernet (RMII)
♦ Compliant with Bluetooth Core Specification version 4.2 including BLE - xPico 250/270
♦ Support for Bluetooth Generic Access Profile (GAP), Generic Attribute Profile (GATT),
Device ID Profile - xPico 250/270
♦ On-module antenna or Dual U.FL
♦ UART (x1), SPI Master (x1), SPI Slave (x1), USB Host/Device and GPIO
♦ Ethernet MAC (RMII), USB, UART – host interfaces
♦ Simultaneous AP and client (STA), AP only, client (STA) only modes
♦ Support for up to 5 simultaneous client connections to Soft AP interface
♦ TruPort® Serial and TruPort Socket providing industry’s most compatible device data
access technology
♦ InfiniShield Security – adding integrated root of trust security and data-at-rest and data-
in-motion encryption, authentication and identification
♦ Direct mobile to device service interface via SoftAP technology (xPico 240/250/270) or
Bluetooth (xPico 250/270)
♦ WPA/WPA2 – Personal and Enterprise Wi-Fi Security
♦ SSL/TLS 1.2 with X.509 Certificate Management
♦ Dual Network Support
♦ Embedded Ethernet to Wi-Fi STA or Ethernet to Wi-Fi Soft AP bridge
♦ Integrated Cloud Based Device Management via MACH10® platform
♦ Web Service API, XML Configuration, Serial Command API
♦ Modular RF Certification (FCC, IC, ETSI, Japan, AU/NZS, China)
♦ Compact SMT (LGA) Footprint (17mm x 25 mm) or Edge Connector Card Footprint (22
mm x 35.5 mm)
♦ Operating temperature range: -40⁰C to +85⁰C
♦ 5-year limited warranty
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 7
2: Hardware and Software Description
The xPico 200 series is a highly integrated module that includes a Cortex R4 controller, 802.11
a/b/g/n MAC/BB, 10/100 Mbps Ethernet MAC, Bluetooth 4.2 (on xPico 250/270), RAM, flash, and
two U.FL antenna connectors or a single on-module antenna (on the xPico 240 only). xPico 270
adds 802.11ac.
The module also includes the following data communication interfaces:
♦ One 10/100Mbps Ethernet MAC with RMII interface for connection to an external PHY
♦ One USB 2.0 high speed Host/Device port
♦ One 300 to 4Mbps UART with hardware flow control
♦ One SPI Slave port operating up to 50 MHz clock rate (5 Mbps application throughput)
♦ Up to 10 GPIO lines
The xPico 200 series operates on 3.3V power with 3.3V logic, and has a built-in voltage
supervisory circuit.
xPico 200 series offers two main variants depending on the connectivity interfaces available:
♦ xPico 240 - Provides dual-band 802.11abgn Wi-Fi and Ethernet combo
♦ xPico 250 - Provides dual-band 802.11abgn Wi-Fi, Ethernet and dual-mode Bluetooth
(Bluetooth Classic and Bluetooth Low Energy)
♦ xPico 270 - Provides dual-band 802.11ac/abgn Wi-Fi, Ethernet and dual-mode Bluetooth
(Bluetooth Classic and Bluetooth Low Energy)
The xPico 200 comes in two form factors:
♦ Small form factor SMT module
♦ Edge connector module with standard connector
xPico 240 has two antenna options:
♦ Two U.FL for connection to external antennas for single stream diversity. See
Chapter 7: Antenna Connection Options for recommended antennas.
♦ Single on-module antenna
xPico 250 and xPico 270 have one antenna option:
♦ Two U.FL for connection to external antennas. One antenna dedicated for Wi-Fi and
one dedicated for BT. See Chapter 7: Antenna Connection Options for recommended
antennas.
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 8
Figure 2-1 xPico 240 Module Options
XPC2401 – LGA, Dual U.FL
XP2403 – Edge Connector, Dual U.FL
XPC2402 – LGA, On-Module Antenna
XPC2404 – Edge Connector,
On-Module Antenna
Figure 2-2 xPico 250 and xPico 270 Module Options
XPC2501, XPC2701 – LGA, Dual U.FL
XPC2503, XPC2703 – Edge Connector, Dual U.FL
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 9
xPico 200 Block Diagram
Figure 2-3 xPico 200 Block Diagram
Software Features
The xPico 200 embedded gateway software stack provides essential IoT connectivity
infrastructure for building secure connected products. Device manufacturers can offload this
complexity from their application microcontroller when interfacing with the module in Network
Co-processor Mode or use the module standalone in Wireless Microcontroller Mode
(Hostless).
Network Co-Processor Mode
The module completely offloads all Wi-Fi and secure network connectivity requirements for
attached microcontrollers thereby reducing device firmware complexity while accelerating
OEM’s time to introduce and support secure connected products in the market. The host
interfaces available for connecting to the microcontroller are UART, USB, SPI Slave, and
Ethernet.
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 10
Figure 2-4 Wi-Fi Integration Mode
Wireless Microcontroller Mode
In addition, the xPico 200 series also can be used as a wireless microcontroller in standalone
mode. With the provided SDK, device manufacturers can leverage not only network and
wireless stacks, but also the complete application framework that includes the configuration
management system, reliable remote OTA firmware upgrades and automated connection
management features described below.
Figure 2-5 Wireless Microcontroller Mode
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 11
TruPort Serial
TruPort Serial, a robust serial to Wi-Fi and serial to Ethernet application that supports the
transparent transport of hundreds of serial protocols over the network. TruPort Serial is very
suitable for use in network co-processor mode based applications requiring very little to no
programming and development effort.
Key capabilities included are:
♦ Support RS232 serial and USB (CDC Serial and CDC ACM device classes)
♦ Advanced connectivity modes and configuration knobs to tune the connection
parameters for a specific protocol without requiring custom software programming
♦ Automatic and Manual connect modes
♦ Inbound (Accept Mode) and Outbound (Connect Mode) connections
♦ Modem Emulation Mode enables connecting to different servers using a standard AT
command set
♦ AES (128-bit, 192-bit, 256-bit) Encrypted session and TLS session modes for secure
tunneling
TruPort Socket
Connect your device microcontroller to multiple services and communicate directly with mobile
devices and cloud services at the same time via TruPort Socket. The simple API for TruPort
Socket is available via the UART, SPI Slave, or USB interface operating in CDC ACM mode.
Seamlessly switch between Data Mode and Module Management Mode (CLI access) for total
control and data channel access from your device host microcontroller.
Access TCP, UDP, TLS, HTTP, SMTP channels and communicate with external services
through these channels without implementing these protocol stacks within your microcontroller.
Ethernet to Wi-Fi Bridge
For devices with microcontrollers that include a network stack and also have Ethernet
connectivity available, the gateway module software provides wireless connectivity to these
devices via the Ethernet to Wi-Fi Bridge mode. Ethernet connected host devices can be
accessed remotely via the Wi-Fi Client interface or via the Wi-Fi Soft AP interface. In this
mode, the Wi-Fi stack is fully offloaded and managed via the configuration interface. This
mode is most suitable for networked microcontrollers that do not have the resources to
integrate wireless device drivers and add-on the complexity of managing the wireless stack.
Concurrent Soft AP and Client Mode
In addition to supporting the standard Soft AP only mode, Client only mode, xPico 200 series
also supports concurrent Soft AP and Client mode.
In this mode, clients can create a direct connection to the Soft AP interface of the gateway,
while the Client interface is connected to the Enterprise Wi-Fi network.
This enables OEM service and support teams to setup a direct connection to their machines to
diagnose, troubleshoot and service them via mobile devices without requiring access to the
customer's Wi-Fi network.
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 12
Enterprise Wi-Fi Security (802.11i, 802.1X/EAP)
Centralized control of security policies and ability to permit and revoke access rights and
scaling to support the large number of devices deployed within the enterprise are primary
considerations that Enterprise Wi-Fi Security addresses. With support for 802.1X, 802.11i and
EAP authentication methods along with support PKI support and X.509 certificate
management, connectivity to the enterprise network is handled via configuration and without
any integration, testing and certification of supplicant and authenticator software.
InfiniShield Security
Device manufacturers are exposed to new security risks that emerge with having connected
products. They also have to navigate the engineering complexity of providing integrated security
within their connected devices. Lantronix InfiniShield Security provides an integrated device
security framework that lets device manufacturers build this into their connected products from
the start of their design cycle instead of as an after-thought or bolted on component.
InfiniShield Security enables building secure connected products quickly and easily with a full
range of features including:
♦ Secure Boot – run only signed software on device
♦ Secure Firmware Over the Air (FOTA) – accept signed firmware and reliable over the
air updates
♦ Secure Connectivity – enterprise Wi-Fi security, data-in-motion authentication and
encryption
♦ Encrypted Storage – stored configuration and device data securely
♦ Fine Grained Port Access Control – prevent back-doors with fine grained control over
network ports
♦ Root of Trust and Device Identity – certificate management, secure key storage, OEM
keys
Wi-Fi Connection Profiles
Connect to multiple wireless networks autonomously by configuring the network parameters
once and then letting the module automatically select the best network to connect to or set
policies for connecting to specific networks. Wi-Fi connection profiles eliminate the need to
manage the state of connection management from the device microcontroller or writing this via
the SDK in wireless microcontroller mode.
Configuration and Management Interface
Access the module configuration and management engine via the microcontroller or via the
network. Command Line Interface (CLI) mode offers a text based interactive interface versus
writing an elaborate driver interface for the AT command and control interface on the device
microcontroller. XML provides a programmatic interface to the module configuration and status
that is accessible via the available host interfaces or over the network interface. Web API offer
the ability to program the module configuration via the Over-The-Air (OTA) or Network
interface. For more details on the usage of these management interfaces, refer to the xPico
240/250 Embedded Wi-Fi Gateway User Guide available at
https://www.lantronix.com/products/xpico-200/
for more details.
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 13
Reliable Firmware Over-The-Air (FOTA) Updates
As device requirements evolve and new product features are provided, device manufacturers
can leverage the reliable OTA firmware upgrade capabilities to prevent “system bricks.” OTA
firmware upgrade always ensures there is at-least one known version of firmware available in
the event an upgrade operation does not succeed. It operates over the connected network and
does not require placing the module into specific operational modes into order to trigger the
update. Updates can be performed remotely and securely using the included Secure Boot
features.
Power Management
xPico 200 series gateways support IEEE 802.11 power save modes for radio power
management. The gateways also includes application aware power management framework
that enables battery powered operation.
Pre-integration with MACH10 Platform
Quickly deliver secure and robust web-scale device management and monitoring for your
connected products with MACH10 Global Device Manager.
Pre-integrated support within xPico 200 series gateways enables your connected products and
the gateway to be managed across the product lifecycle from deployment to decommissioning.
Remote Gateway Management with Lantronix Gateway Central
Leverage powerful monitoring and management capabilities for Lantronix gateways using
Lantronix Gateway Central. Use Google-like search to quickly locate gateways, trigger
centralized remote firmware updates and setup customized alerts and notifications on
monitoring parameters across your fleet of Lantronix gateways.
With Lantronix Gateway Central, you can maintain a consistent factory configuration or default
field configuration or stay on an approved firmware baseline without paying for custom
programming services.
Integrated Bluetooth Classic and Bluetooth Low Energy Stacks (xPico 250)
Implement custom BLE profiles with the available SDK and leverage the underlying Bluetooth
Stack that complies with Bluetooth Core Specification version 4.2 including BR/EDR/BLE,
supports Generic Access Profile (GAP) and Generic Attribute Profile (GATT). It provides
support for BLE Central role to enable communication with various BLE sensors and
peripherals. As a BLE peripheral it enables communication with mobile devices.
Utilize the pre-integrated Lantronix Gateway Provisioning Profile along with the Gateway
Provisioning mobile application to bootstrap initial gateway wireless and network configuration
from mobile devices.
Leverage the integrated connection management to pair, bond, and connect with Bluetooth
Classic (BR/EDR) devise. Supports the following BT Classic Profiles:
♦ Serial Port Profile (SPP) – Client and Server* mode
♦ A2DP* (Data mode only)
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 14
ANT1
2X U.FL WI-FI
ANT2
(or BLUETOOTH)
3: Pin and Pad Definitions
Table 3-2 describes the xPico 200 Wi-Fi interface signal definition. The Signal Name column
identifies the signal pin being described while the Primary Function column provides
definitions of the signal pin depending upon the member of the xPico 200 family being used.
Differentiating the signal pins is beneficial when using multiple xPico 200 device types on a
single platform.
Figure 3-1 xPico 200 Edge Connector Pin & Signal Location
WI-FI DIVERSITY
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 15
Table 3-1: xPico 200 Edge Connector Signal Descriptions
Pin Signal Pin Signal
1 GND 2 3.3V
3 USB_D+ 4 3.3V
5 USB_D- 6 SYS_LED
7 GND 8 NC
9 SDIO_SCK/SPI_CLK (slave) 10 NC
11 SDIO_CMD/SPI_MOSI (slave) 12 USB_H/D_SEL
13 SDIO_DATA0/SPI_MISO (slave) 14 SDIO_MODE/SPI_SLAVE_MODE
15 SDIO_DATA1/SPI_IRQ (slave) 16 CP9/LED
17 SDIO_DATA2 18 GND
19 SDIO_DATA3/SPI_CS (slave) 20 WAKE
21 NC 22 UART_TXD
23 DEFAULT# 32 UART_RXD
33 GND 34 UART_RTS
35 TDO 36 UART_CTS
37 TDI 38 TRST
39 GND 40 CP8/CS (master)
41 TCK 42 CP7/SCK (master)
43 TMS 44 CP4/MOSI (master)
45 GND 46 CP3/MISO (master)
47 RMII_MDC 48 CP2/INT (master)
49 RMII_MDIO 50 CP1
51 GND 52 RESET#
53 RMII_RXD1 54 I2C2_CLK
55 RMII_RXD0 56 I2C2_DATA
57 GND 58 CP5/I2C_DATA
59 NC 60 CP6/I2C_CLK
61 RMII_CLK 62 CP10/PWM
63 GND 64 NC
65 RMII_RXDV 66 RSVD_CP12
67 RMII_TXEN 68 RSVD_CP11
69 GND 70 RMII_RST
71 RMII_TXD1 72 3.3V
73 RMII_TXD0 74 3.3V
75 GND
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 16
Figure 3-2 xPico 200 PCB Interface Pin & Signal Location
xPico® 200 Series Embedded Wi-Fi® Gateway Data Sheet 17
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