Silex technology SX-550 User manual

SX-550 Embedded Intelligent Module
Developer’s Reference Guide
Revision L

© 2009 Silex Technology America, Inc.. All rights reserved.
March 2009
Silex Technology America SPE IFI ALLY DIS LAIMS THE IMPLIED WARRANTIES OF
MER HANTABILITY AND FITNESS OF THIS PRODU T FOR A PARTI ULAR PURPOSE. Silex
shall not be liable for any errors contained in this manual or for any damages resulting from loss of
use, data, profits, or any incidental or consequential damages arising from the use of SILEX
products or services. The information contained in this documentation is subject to change without
notice.
Information and descriptions contained herein are the property of Silex. Such information
and descriptions may not be copied, disseminated, or distributed without the express
written consent of Silex. This publication is subject to change without notice.
The software embedded in this SX-550 module includes e os, the Embedded
onfigurable Operating System. e os is licensed under a GNU GPL compatible Free
Software License. In compliance with the e os license, the Silex is offering the e os
source code for this product on our web site at http://www.silexamerica.com. A copy of the
e os and GNU General Public License are available in the license folder on the DROM
that ships with this product.
Trademarks
ExtendView is a trademark of Silex Technology America, Inc. All other company or
product names referenced in this document may be trademarks or registered trademarks
of their respective owners.
Silex Technology America, Inc.
www.silexamerica.com

Contents
About This Reference Guide....................................................................................................................................1
Safety Precautions................................................................................................................................................1
Emissions Disclaimer............................................................................................................................................1
hapter 1: Introduction............................................................................................................................................3
hapter 2
Installing the Evaluation Daughtercard.....................................................................................................................5
Verify Development Kit ontents .........................................................................................................................6
Installing the SX-550 Module................................................................................................................................7
Monitoring Module Status ...................................................................................................................................8
OEM Interface.......................................................................................................................................................9
Electrical haracteristics.....................................................................................................................................11
Power Input.....................................................................................................................................................11
Power Management........................................................................................................................................11
Serial Ports......................................................................................................................................................11
Using the Optional Serial Signals.................................................................................................................12
General Purpose I/O........................................................................................................................................13
LEDs and General Purpose IO Signals...........................................................................................................15
RS-232 able..................................................................................................................................................15
Additional OEM Interface Signals....................................................................................................................16
OEM Interface Electrical haracteristics.........................................................................................................17
hapter 3
onfiguring the SX-550..........................................................................................................................................19
Basic onfiguration Requirements......................................................................................................................19
onfiguration Methods........................................................................................................................................20
Using the ExtendView Utility to onfigure the SX-550 (Ethernet onnection)....................................................21
First-Time IP Address onfiguration ..................................................................................................................24
Using a Web Browser to onfigure the SX-550..................................................................................................27
Using the Internal ommand onsole to onfigure the SX-550.........................................................................29
hapter 4
Using the SX-550 with Your Application.................................................................................................................33
ustomizing the SX-550 User Interface..............................................................................................................34
Power onfiguration............................................................................................................................................34
Serial Port Emulator............................................................................................................................................34
Raw T P connection..........................................................................................................................................35
RF 2217 Support..............................................................................................................................................36
E able Mode......................................................................................................................................................36
Print Server Mode...............................................................................................................................................38
FTP.....................................................................................................................................................................38
onsole Mode Switching.....................................................................................................................................38
AT ommands....................................................................................................................................................39
SNMP Traps, Email Alerts, and GPIO Status......................................................................................................39
Bridge Mode........................................................................................................................................................40
Part Number 40183-101 Silex SX-550 Developer's Guide Page i

hapter 5
Interfacing the SX-550 to the OEM Device.............................................................................................................41
OEM Header Interface........................................................................................................................................43
Antenna onnectors...........................................................................................................................................46
Ethernet PHY......................................................................................................................................................48
Transformer Specification................................................................................................................................48
General Purpose I/O Interface............................................................................................................................49
Power..................................................................................................................................................................50
hapter 6
Advanced onfiguration.........................................................................................................................................51
Factory Default Settings......................................................................................................................................51
Restoring Factory Default Settings..................................................................................................................52
Modifying T P/IP Settings ................................................................................................................................52
onfiguring SNMP..............................................................................................................................................54
onfiguring the General Purpose I/O (GPIO) Lines............................................................................................56
onfiguring Serial Port Monitor Alert and Trap onfiguration.............................................................................70
Setting up Email Alerts and SNMP Traps...........................................................................................................71
Using AT Modem ommands.............................................................................................................................71
Standard AT ommands Supported................................................................................................................72
Response odes.................................................................................................................................................74
Using ExtendView for Bulk onfiguration............................................................................................................74
hapter 7
Product Specifications............................................................................................................................................75
T P Port onnections........................................................................................................................................78
Appendix A
Advanced Security onfiguration............................................................................................................................79
Appendix B
onsole ommands...............................................................................................................................................83
Wireless and Network Security ommands........................................................................................................83
Port ommands..................................................................................................................................................90
Server Information ommands...........................................................................................................................91
Service ommands.............................................................................................................................................93
String ommands...............................................................................................................................................95
T P/IP ommands.............................................................................................................................................96
Bridge mode configuration................................................................................................................................100
Power onfiguration ommands......................................................................................................................100
Firmware Update...............................................................................................................................................101
Miscellaneous ommands................................................................................................................................102
Help ommands...............................................................................................................................................103
Appendix
Engineering Drawings...........................................................................................................................................105
Antenna ............................................................................................................................................................105
Antenna able..................................................................................................................................................107
Appendix D
Regulatory Information.........................................................................................................................................108
Part Number 40183-101 Silex SX-550 Developer's Guide Page ii

Emissions Disclaimer (All SX-550 Models).......................................................................................................108
Modular Approval Information (SX-550-2701 only)...........................................................................................108
F Information (SX-550-2701 only)................................................................................................................109
Information for anadian Users (I Notice) (SX-550-2701 only)......................................................................110
RoHS Declaration of onformity (All SX-550 Models)......................................................................................110
Appendix E
Firmware Update Procedures...............................................................................................................................112
Appendix F
Silex ontact Information......................................................................................................................................114
Figures
Figure 1 SX-550-1701 (left) and SX-550-2701 (right)..............................................................................................4
Figure 2 Installing SX-550 Module in Evaluation Daughtercard (SX-550 WLAN version shown)............................5
Figure 3 SX-550 Module Inserted in Daughtercard (SX-550-1701 WLAN version shown)......................................7
Figure 4 Antenna onnectors..................................................................................................................................7
Figure 5 Optional Serial Signals.............................................................................................................................12
Figure 6 Serial Port DB-9 onnector.....................................................................................................................12
Figure 7 RS-232 able Pinouts.............................................................................................................................15
Figure 8 T P/IP Window.......................................................................................................................................52
Figure 9 hange Password Window......................................................................................................................53
Figure 10 Advanced T P/IP onfiguration Window..............................................................................................54
Figure 11 SNMP onfiguration..............................................................................................................................56
Figure 12 Antenna Mechanical Drawing (Silex Part Number 108-00016-050)....................................................106
Tables
Table 1 Development Kit ontents..........................................................................................................................6
Table 2 Status Monitors ...........................................................................................................................................8
Table 3 OEM Interface Pinout..................................................................................................................................9
Table 4 OEM Interface Signal Description..............................................................................................................10
Table 5 Logical Serial Port Signal Descriptions.....................................................................................................11
Table 6 DB-9 Pinouts for RS-232 Mode................................................................................................................12
Table 7 General Purpose IO Signal Descriptions..................................................................................................13
Table 8 General Purpose I/O Signal Description...................................................................................................14
Part Number 40183-101 Silex SX-550 Developer's Guide Page iii

Table 9 LED and GPIO Descriptions.....................................................................................................................15
Table 10 RS-232 able Pinout Description...........................................................................................................16
Table 11 OEM Signal Parameter Descriptions......................................................................................................17
Table 12 OEM Header Interface Pinout.................................................................................................................43
Table 13 OEM Interface Signal Description............................................................................................................44
Table 14 Antenna onnector Types .....................................................................................................................47
Table 15 10/100M Magnetic Specifications............................................................................................................48
Table 16 10/100M Magnetics Manufacturers.........................................................................................................49
Table 17 GPIO Interface........................................................................................................................................49
Table 18 Factory Default Settings..........................................................................................................................51
Table 19 T P/IP Settings......................................................................................................................................53
Table 20 T P/IP onfiguration Settings................................................................................................................54
Table 21 SNMP ommands..................................................................................................................................55
Table 22 GPIO General ommands......................................................................................................................57
Table 23 GPIO Trigger ommands.......................................................................................................................60
Table 24 GPIO Transmit ommands.....................................................................................................................63
Table 25 GPIO Data ommands...........................................................................................................................63
Table 26 E-GPIO T P Monitor ommands...........................................................................................................65
Table 27 GPIO SNMP Management......................................................................................................................66
Table 28 Port Monitor Alert ommands................................................................................................................69
Table 29 AT ommands........................................................................................................................................71
Table 30 Extended AT ommands........................................................................................................................72
Table 31 Response odes....................................................................................................................................73
Table 32 Product Specifications............................................................................................................................74
Table 33 Radio Performance Specifications..........................................................................................................74
Table 34 T P Port onnections............................................................................................................................77
Table 35 Network ommands...............................................................................................................................82
Table 36 Port ommands......................................................................................................................................89
Table 37 Server Information ommands...............................................................................................................90
Table 38 Service ommands.................................................................................................................................92
Table 39 String ommands...................................................................................................................................94
Table 40 T P/IP ommands.................................................................................................................................95
Table 41 Power onfiguration ..............................................................................................................................99
Part Number 40183-101 Silex SX-550 Developer's Guide Page iv

Table 42 Firmware Update..................................................................................................................................100
Table 43 Miscellaneous ommands....................................................................................................................101
Table 44 Antenna Specifications.........................................................................................................................105
Part Number 40183-101 Silex SX-550 Developer's Guide Page v

About This Reference Guide
This reference guide provides detailed specifications, diagrams and additional information required to integrate
the SX-550 embedded intelligent module in a product. The intended audiences are the developers and engineers
responsible for the integration of the module in another product.
Safety recautions
•To prevent damage to the SX-550 module’s electronic circuit components, follow established ESD
practices and procedures for handling static-sensitive devices. All ESD-sensitive components must be
stored and shipped in ESD-conductive bags or bubble-wrap and labeled as such using the standardized
ESD adhesive warning label.
•Ethernet electrical wiring must be at least 6 feet from bare power wiring or lightning rods and associated
wires, and at least 6 inches from other types of wire (antenna wires, doorbell wires, wires from
transformers to neon signs), steam or hot water pipes, and heating devices.
•Protectors and grounding wire placed by the service provider must not be connected to, removed, or
modified by the customer.
Emissions Disclaimer
Final emission certification per F , E and other agency requirements are the responsibility of the OEM using
any printed circuit assemblies or other items used in this developer’s kit in their saleable packaged product.
Part Number 40183-101 Silex SX-550 Developer's Guide Page 1

Part Number 40183-101 Silex SX-550 Developer's Guide Page 2

Chapter 1: Introduction
The SX-550 embedded intelligent module provides a complete solution for integrating wireless or
wired networking technology into virtually any OEM product that has an RS-232 or UART serial
port. It can also be used as an Ethernet to 802.11 bridge to enable wireless capabilities on
devices that have an Ethernet interface. It is available in two models:
•SX-550-0700 Ethernet model. The SX-550 Ethernet model consists of a printed circuit
board (processor card) that measures 44.60 mm by 59.70 mm. It includes an embedded
processor, auto-sensing 10Base-T/100Base-TX Ethernet MA /PHY, two UART serial
ports (one port is dedicated for use with a console terminal), intelligent power control, and
an embedded operating system with a full networking stack and drivers.
•SX-550-2701 WLAN model. This wireless model uses the same processor card as the
Ethernet model, but also adds a second printed circuit board (radio card) that contains an
802.11a/b/g wireless LAN radio based on Atheros’s AR5413 chipset. This second board
measures 36.0 by 59.70 mm; the two boards plug together via a 20-pin connector. Note
that the Ethernet interface and the wireless radio cannot be used concurrently except
when the Ethernet-to-802.11 bridge mode feature is enabled. The SX-550-2701 includes
F Modular Approval, which can eliminate the need to test for compliance with F
Part 15 Subparts and E and RSS-210 intentional radiation standards. Please refer to
Appendix D for specific information about F Modular Approval.
IM ORTANT: The SX-550-2701 modular approval requires use of an antenna and antenna cable with
the same characteristics as those used for the Silex testing. Silex can only support testing of other
antenna configurations in the end user product for the US and Canada regulatory domains.
•SX-550-1701 WLAN model. This wireless model uses the same processor card as the
Ethernet model, but adds a second printed circuit board (radio card) that contains an
802.11a/b/g wireless LAN radio based on onexant’s PRISM WorldRadio chipset. This
second board also measures 44.60 by 59.70 mm; the two boards plug together via a 20-
pin connector. Note that the Ethernet interface and the wireless radio cannot be used
concurrently except when the Ethernet-to-802.11 bridge mode feature is enabled.
Part Number 40183-101 Silex SX-550 Developer's Guide Page 3
Important: The SX-550-1701 model does NOT include FCC Modular Approval, so it is the responsibility of the
OEM to test for compliance with FCC art 15 Subparts C and E and RSS-210 intentional radiation standards.

Figure 1 SX-550-1701 (left) and SX-550-2701 (right)
The SX-550-1701 and SX-550-2701 are virtually identical in form and functional identical, with a
few minor differences. The one major difference is the SX-550-2701 includes F modular
approval (see Appendix D). Other differences include:
•International roaming (802.11d) is a standard non-configurable feature of the SX-550-
2701, so there are no corresponding configuration items.
•Programmable RTS threshold is supported on the SX-550-1701 and not on the SX-550-
2701
•User defined scan mask is supported on the SX-550-2701 and not on the SX-550-1701
•User defined transmit power level supported on the SX-550-2701 and not on the SX-550-
1701
•802.11b only mode supported on the SX-550-1701 and not on the SX-550-2701
•Default radio mode is 802.11b/g on the SX-550-1701 and 802.11a/b/g on the SX-550-
2701
•Transmit rate setting supported on the SX-550-1701 and not on the SX-550-2701
•AP density (roaming control) supported on the SX-550-1701 and not on the SX-550-2701
•WPA group key for link encryption supported on the SX-550-1701 and not on the SX-
550-2701
•Blank SSID indicating any SSID OK supported on the SX-550-1701 and not on the SX-
550-2701
To expedite the development process, the SX-550-6900 Evaluation Daughtercard is available.
This board includes an RJ45 Ethernet connector, two 9-pin serial connectors, power supply,
antenna, cables, and software. The Evaluation Daughtercard is described in detail in hapter 2
of this manual.
Part Number 40183-101 Silex SX-550 Developer's Guide Page 4

Chapter 2
Installing the Evaluation Daughtercard
The SX-550-6900 Evaluation Daughtercard is designed to help you in the development of the necessary
hardware and software required to use the SX-550 module. It includes I/O connectors, cables, and power
supply in an easy-to-use package. The SX-550 Module is installed in the Evaluation Daughtercard as
shown in Figure 2.
Figure 2 Installing SX-550 Module in Evaluation Daughtercard (SX-550 WLAN version shown)
The Evaluation Daughtercard makes it easy to connect to the SX-550 for test and development by
providing the following:
•Two (2) 9-pin connectors and two (2) 10-pin headers for connecting the SX-550 serial ports
•One (1) 20-pin header for connecting GPIOs, power, and ground
•One (1) RJ45 Ethernet connector
•One power jack
•3 LEDs for displaying the power and network status
•7 LEDs for monitoring the GPIO signals
•One (1) Test Button for printing configuration data and resetting the SX-550 to factory defaults
Part Number 40183-101 Silex SX-550 Developer's Guide Page 5

•One (1) 18-pin header for selecting GPIOs as modem controls
Verify Development Kit Contents
The SX-550-6900 Evaluation Module Development Kit consists of the components listed in Table 1.
Please ensure that all materials listed are present and free from visible damage or defects before
proceeding. If anything appears to be missing or damaged, please contact SILEX.
Table 1 Development Kit Contents
Description
SX-550-6900 Evaluation Daughtercard
2 x Antennas with 4-inch ables
2 x Magnetic Stand with 3-foot ables
5 VD 1 Amp Power Supply
A Power ord for US
A Power ord for Europe
2 x Serial Null Modem ables with Gender hanger
Plastic bag containing:
4 x Rubber Feet with Adhesive
3 M2 screws
3 M2 nuts
3  3mm nylon spacers
3  8mm nylon spacers
D containing:
ExtendView Software
Serial Port Emulator
This User’s Guide
Part Number 40183-101 Silex SX-550 Developer's Guide Page 6

Installing the SX-550 Module
To install the SX-550 module in the SX-550-6900 Evaluation Daughtercard:
1. Using the 40-pin OEM header, plug the SX-550 Module in the SX-550-6900 Evaluation Daughtercard
and secure with screws, nuts and spacers. Important: The spacers MUST be installed to avoid
potential damage to the boards.
Figure 3 SX-550 Module Inserted in Daughtercard (SX-550-1701 WLAN version shown)
2. If you are installing a SX-550 WLAN model, plug the main antenna cable into the Primary Antenna
onnector on the card (see picture below). If needed, plug the auxiliary antenna cable into the
Auxiliary Antenna onnector.
Figure 4 Antenna Connectors
Part Number 40183-101 Silex SX-550 Developer's Guide Page 7
IM ORTANT: If you are only using a single antenna, you MUST connect this antenna to the rimary Antenna
Connector.

3. If you are installing an SX-550 WLAN model, connect the magnetic antenna base cable to the
antenna cable.
4. If you are installing an SX-550 WLAN model, connect the antenna to the base.
5. onnect one serial null-modem cable from the Serial Port 2 DB-9 connector on the Evaluation
Daughtercard to a serial port on a personal computer or laptop. The P or laptop acts as a console
port for command line configuration and monitoring.
6. If an Ethernet LAN connection is required, plug a category 5 Ethernet cable into the RJ-45 jack.
The Ethernet interface has Auto-MDIX that automatically detects and configures itself for either a
straight-thru or crossover Ethernet cable.
Monitoring Module Status
You can monitor the module status using the yellow, green and orange LED status indicators on the
monitor. Table 2 defines the default functions of the LED status indicators.
Table 2 Status Monitors
Function State Status
Power
Orange
On The module is receiving power
Off The module is not receiving power
Blinking The module power supply is malfunctioning
Network Status
Yellow or Green
Yellow Off
Green Off No network activity
Yellow On
Green Off 10base-T network active
Yellow Blinking
Green Off 10base-T network data received
Yellow Off
Green On 100base-TX network active
Yellow Off
Green Blinking 100base-TX network data received
Yellow On
Green On Wireless network active, if WLAN model
Yellow Blinking
Green Blinking Wireless network data received, if WLAN model
Part Number 40183-101 Silex SX-550 Developer's Guide Page 8

OEM Interface
The OEM interface is a 40-pin header that is used to connect the SX-550 module to the SX-550-6900
Evaluation Daughtercard. It will also serve as the primary means of communications between the SX-550
and your OEM device (refer to hapter 5 for information on using this header to connect with your
device).
Table 3 shows the OEM interface pinout, J5, for the Evaluation Daughtercard. Table 4 shows the OEM
interface signal descriptions. Please note that the OEM interface signals are not directly accessible from
the OEM header when the Evaluation Daughtercard is used. Rather, these signals are available through
convenient connectors on the Evaluation Daughtercard, such as the RJ45 Ethernet connector and the 9-
pin serial connectors. These connectors are described later in this chapter.
All input and output signals, except the differential signals, are 0 to 3.3 V logic signals.
Table 3 OEM Interface inout
in Signal in Signal
1 TPRX+ 2 TPTX+
3 TPRX- 4 TPTX-
5 GPIO_7* 6 GPIO_8*
6 AVDD 8 +3.3VDD
9 UART0_RXD 10 GPIO_9
11 UART0_TXD 12 GPIO_10
13 GND 14 +3.3VD
15 UART0_RTS 16 UART0_ TS
17 UART1_RTS 18 UART1_ TS
19 GND 20 GND
21 21UART1_TXD 22 UART1_RXD
23 GND 24 RESET_N
25 MANF_TEST 26 MANF_TEST
27 +3.3VD 28 GND
29 GPIO_1 30 MANF_TEST
31 GPIO_2 32 MANF_TEST
33 +3.3VD 34 GND
35 GPIO_3 36 GPIO_4
37 GND 38 GND
39 GPIO_5 40 GPIO_6
*GPIO_7 is fixed as a switch input (Test Button) and GPIO_8 is fixed as an LED output (Power).
Part Number 40183-101 Silex SX-550 Developer's Guide Page 9

Table 4 OEM Interface Signal Description
Signal in Type Description
TPRX+, TPRX- 1,3 Differential
input
Ethernet Receive Data primary
TPTX+, TPTX- 2,4 Differential
output
Ethernet Transmit Data primary
AVDD 7 Power Ethernet Power Output to transformer
center tap
UART0_RXD 9 Input Serial Port 1 Receive Data
UART0_TXD 11 Output Serial Port 1 Transmit Data
UART0_RTS 15 Output Serial Port 1 Request To Send
UART0_ TS 16 Input Serial Port 1 lear to Send
UART1_RXD 22 Input Serial Port 2 Receive Data
UART1_TXD 21 Output Serial Port 2 Transmit Data
UART1_RTS 17 Output Serial Port 2 Request To Send
UART1_ TS 18 Input Serial Port 2 lear to Send
GPIO1, GPIO2,
GPIO3, GPIO4,
GPIO5, GPIO6,
GPIO7, GPIO8,
GPIO9, GPIO10
29, 31, 35, 36,
39, 40, 5, 6,
10, 12
Input/Output General Purpose Input/Output Signals 1-
10, User defined (GPIO7 is normally used
for the Test Button and GPIO8-GPIO10
are normally used for the status LEDs)
MANF_TEST 25 Output For Manufacturing use only. Do not
onnect.
MANF_TEST 30 Output For Manufacturing use only. Do not
onnect.
MANF_TEST 32 Input For Manufacturing use only. Do not
onnect.
MANF_TEST 26 Output For Manufacturing use only. Do not
onnect.
RESET_N 24 Output Power-on Reset (low true)
+3.3VD 8, 14, 27, 33 Power Power V Input
GND 13, 19, 20, 23,
28, 34, 37, 38
Power Power Ground
Part Number 40183-101 Silex SX-550 Developer's Guide Page 10

Electrical Characteristics
The power requirements, port pinouts, GPIO characteristics, cable connections and wireless operational
modes are described below.
ower Input
Power to the SX-550 Module and the SX-550-6900 Evaluation Daughtercard is supplied through the
power jack, located at J4, at +5VD ±10%. Use the included power supply or an equivalent +5VD
power supply with a minimum of 1 amp capacity.
Power of +3.3VD ±5% is input to the SX-550 Module via the OEM header, J5.
ower Management
Power for the SX-550 Module is less than 3 watts in normal power mode and peak consumption is less
that 3.3 watts. In low power mode average power is 1.2 watts.
Serial orts
The two serial ports can be accessed with RS-232 signals, via the DB-9 connectors, or logic signals, via
the 10-pin headers. Note that serial port 2 is dedicated for use as a console port for configuring the SX-
550. Serial Port 2 is always set for operation at 115.2Kbps, 8 bit character size, no parity, and no flow
control.
The two logical serial port headers are located at JP2 and JP6. The serial ports provide four dedicated
signals and three optional signals. The optional signals are configured using jumpers. Table 5 details the
serial port signal descriptions.
Table 5 Logical Serial ort Signal Descriptions
in Signal Input/Output in Signal Input/Output
1 D D Input
Enabled via header
2 DSR Input
Enabled via header
3 RXD Input 4 RTS Output
5 TXD Output 6 TS Input
7 DTR Output
Enabled via header
8 No
onnect
9 GND 10 3.3V
All signals are 0 to 3.3 V logic signals.
To use header JP2, disable the RS-232 transceiver, U3, by placing a jumper on both JP8 pins.
To use header JP6, disable the RS-232 transceiver, U6, by placing a jumper on both JP9 pins.
Part Number 40183-101 Silex SX-550 Developer's Guide Page 11

Using the Optional Serial Signals
Signals GPIO 1 to 6 can be used as GPIO or Serial Port control signals DTR, DSR and D D.
To configure signals DTR, DSR and D D, place a jumper between JP4 and JP5 for that signal, as shown
in Figure 5.
D
C
D
2
D
T
R
1
D
S
R
1
D
C
D
1
D
T
R
2
D
S
R
2
G
I
O
1
G
I
O
2
G
I
O
3
G
I
O
4
G
I
O
5
G
I
O
6
J 3
J 4
J 5
Figure 5 Optional Serial Signals
To select the GPIO signals, place the jumper between JP3 and JP4. The GPIO signals are available at JP7.
Standard serial RS-232 signals are available on the DB-9 connectors J2 and J3 for serial ports 1 and 2,
as shown in Figure 6.
Figure 6 Serial ort DB-9 Connector
Table 6 DB-9 inouts for RS-232 Mode
DB-9 RS-232 Signal
1
2
3
4
5
6
7
8
9
Part Number 40183-101 Silex SX-550 Developer's Guide Page 12