Digi One SP Application guide

Digi Connect SP and Digi Connect
Wi-SP
Digi Connect Family
Hardware Reference

Digi Connect SP and Digi Connect Wi-SP Hardware Reference 2
Revision history—90000540
Revision Date Description
H November
2022
Updated the Immunity values. See Certifications.
G October
2015
In Specifications >Digi Connect Wi-SP, lowered transmit power for
the Digi Connect Wi-ME 7520 radio used in the Digi Connect Wi-SP from
16 dBm to 14 dBm to be lowered to comply with new European Wi-Fi
requirements.
Changed Programming considerations >GPIO section to minimize
content and state that GPIO control is available as GPIOxx if using the
Digi Connect SP and Digi Connect Wi-SP with NET+OS firmware, with a
reference to NET+OS and hardware reference information.
Applied new front cover format.
Moved Change Log to front matter.
Applied new documentation template.
F 8/12/2011 Changed barrel connector to locking barrel connector in the “Power
Jack” section of Chapter 1. Added Digi contact information.
E 12/28/2006 Digi branding changes.
D 8/12/2005 Updated Antenna drawing. Changed antenna restriction in North
America. Added product weight.
Trademarks and copyright
Digi, Digi International, and the Digi logo are trademarks or registered trademarks in the United
States and other countries worldwide. All other trademarks mentioned in this document are the
property of their respective owners.
© 2022 Digi International Inc. All rights reserved.
Disclaimers
Information in this document is subject to change without notice and does not represent a
commitment on the part of Digi International. Digi provides this document “as is,” without warranty of
any kind, expressed or implied, including, but not limited to, the implied warranties of fitness or
merchantability for a particular purpose. Digi may make improvements and/or changes in this manual
or in the product(s) and/or the program(s) described in this manual at any time.
Warranty
To view product warranty information, go to the following website:
www.digi.com/howtobuy/terms
Customer support
Gather support information: Before contacting Digi technical support for help, gather the following
information:

Digi Connect SP and Digi Connect Wi-SP Hardware Reference 3
Product name and model
Product serial number (s)
Firmware version
Operating system/browser (if applicable)
Logs (from time of reported issue)
Trace (if possible)
Description of issue
Steps to reproduce
Contact Digi technical support: Digi offers multiple technical support plans and service packages.
Contact us at +1 952.912.3444 or visit us at www.digi.com/support.
Feedback
To provide feedback on this document, email your comments to
[e-mail]
Include the document title and part number (Digi Connect SP and Digi Connect Wi-SP Hardware
Reference, 90000540 H) in the subject line of your email.

Contents
Digi Connect SP and Wi-SP
Related documentation 6
Hardware
Digi Connect SP hardware 7
Digi Connect Wi-SP hardware 8
LEDs 8
Reset button 9
Antenna description 9
MEI 232/422/485 switch settings 9
DB-9 connector 10
JTAG interface 10
Power jack 12
Programming considerations
General Purpose I/O (GPIO) control 13
LEDs 13
Memory 14
Reset button 14
Specifications
Network interfaces 15
Serial interface 15
Data rates (bps) 15
Flow control options 16
Environmental specifications 16
Power requirements 16
Mechanical specifications 16
Antenna information 16
Overlay specifications 20
RF exposure statement for Digi Connect Wi-SP 22
Certifications
FCC Part 15 Class A 23
Radio Frequency Interference (RFI) (FCC 15.105(a) 23
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 4

Digi Connect SP and Digi Connect Wi-SP Hardware Reference 5
Labeling requirements (FCC 15.19) 23
Modifications (FCC 15.21) 23
Cables (FCC 15.27) 23
Innovation, Science and Economic Development Canada 23
International EMC standards 24

Digi Connect SP and Wi-SP
The purpose of this guide is to assist developers creating custom embedded software for the Digi
Connect SP and Digi Connect Wi-SP platform using the NET+OS operating system and tools.
Related documentation
See the Digi website for the following related documentation:
nSee the NS7520 Hardware Reference manual for information on the NS7520 chip.
nSee the NET+Works BSP Porting Guide for additional programming information.
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 6

Hardware
The figures identify various Digi Connect SP and Digi Connect Wi-SP connectors, LEDs and switches.
MEI switches and the Reset button are in the same location for both the Digi Connect SP and Digi
Connect Wi-SP.
Digi Connect SP hardware
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 7

Hardware Digi Connect Wi-SP hardware
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 8
Digi Connect Wi-SP hardware
LEDs
Digi Connect SP and Digi Connect Wi-SP have three LEDs: PWR, Link, and ACT.
LED Color Purpose
PWR Red This LED is software programmable. The default is that this LED indicates power
and is therefore always on. See LEDs for more information.
Link Green Network link status:
nOn: unit is associated with an access point.
nBlinking slowly: unit is in ad hoc mode.
nBlinking quickly: unit is scanning for a network.
ACT Yellow Ethernet status:
nOn: indicates bad initialization.
nOff: indicates Ethernet network is ready.
nBlinking: indicates network activity.

Hardware Reset button
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 9
Reset button
The behavior of the reset button is user-defined.
See Reset button and the NS520 BSP Porting Guide for LED programming information.
Antenna description
The Digi Connect Wi-SP is available with 1 RP-SMA connector. The antenna is connected to the product
with a reverse polarity SMA connector (sub-miniature size A). The antenna fits on the product one way
only to ensure a proper connection. Another option for both signal reception and design flexibility is to
use a 30cm antenna extension cord (Digi part number DC-ANT-E-24DP) with .5dB loss to separate the
antenna from the product.
CAUTION! This FCC Part 15 Class A radio device operates on a non-interference basis with
other devices operating at this frequency when using the antennae listed in the Antenna
Specification table. Any changes or modification to the product not expressly approved by Digi
International could void the user’s authority to operate the device.
Type Desktop Dipole 30 cm Antenna Extension Cord
Part number DC-ANT-24DT DC-ANT-24DP DC-ANT-E-24DP
Gain 1.8 dBi 2 dBi -0.5 dBi
MEI 232/422/485 switch settings
These switches set the MEI (multiple electrical interface) line protocol on the serial interface.
Function
Switch Setting
1234
EIA-232 Up Down Down Down
EIA-422/485 full-duplex Down Up Down If up, termination.
If down, no termination.
EIA-485 half-duplex Down Down Up

Hardware DB-9 connector
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 10
DB-9 connector
The figure and table provide information on DB-9 pin orientation and pin assignments.
DB-9 pin orientation
DB-9 pin assignments
Pin EIA-232 EIA-422/485 Full-Duplex EIA-485 Half-Duplex
1 DCD CTS- Not used
2 RXD RXD+ RXD+
3 TXD TXD+ TXD+
4 DTR RTS- Not used
5 GND GND GND
6 DSR RXD- RXD-
7 RTS RTS+ Not used
8 CTS CTS+ Not used
9 NA TXD- TXD-
JTAG interface
The Digi Connect SP Development Kit is provided with the case opened, providing access to the JTAG
interface which mates with a JTAG debugger plug; for example, the Macraigor Raven included in the
Development Kit.

Hardware JTAG interface
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 11
Digi Connect SP JTAG debugger connector
JTAG debugger pin assignments
Pin Assignment
Pin1 VCC+
Pin 2 GND
Pin 3 /TRST
Pin 4 GND
Pin 5 TDI
Pin 6 GND
Pin 7 TMS
Pin 8 GND
Pin 9 TCK
Pin 10 GND
Pin 11 TDO
Pin 12 /SRST
Pin 13 VCC+
Pin 14 GND

Hardware Power jack
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 12
Power jack
The power jack is a locking barrel connector that accepts 9 to 30 VDC +/- 5%. The jack is labeled as
P11 on the development board.
Power jack polarity
Contact Polarity
Center +9 to +30 VDC
Outer Ground
The following figure schematically represents the polarity of the power jack. To purchase the locking
barrel connector for your DC supply, please contact Digi.

Programming considerations
This topic presents programming considerations for the Digi Connect SP and Digi Connect Wi-SP and
the NS7520 processor on which these products are based.
General Purpose I/O (GPIO) control
General purpose I/O (GPIO) control is available as GPIOxx if using the Digi Connect SP and Digi
Connect Wi-SP with NET+OS firmware. See the NET+OS documentation and the NS7520 Hardware
Reference manual for more details.
LEDs
The device server has two types of LEDs:
nLEDs connected directly to GPIO pins on the processor and controlled directly in software
nLEDs connected to other hardware components, normally the Ethernet hardware, and not
directly programmable by the operating system
The development kit supplies software to control the LEDs. This behavior can often be modified by
manipulating the LED table in the BSP code. In the development kit, see the file gpio.c for details.
As with any GPIO output, the GPIO register must be properly configured in order to assert values on
the pin. The appropriate bits should be configured as:
nCMODE = 0
nCDIR = 1
nCSF = 0
The device server has three LEDs:
nThe green LED is wired directly to the Ethernet hardware and indicates that a link has been
established.
nThe yellow LED is wired directly to the Ethernet hardware and signals Ethernet activity.
nThe red LED is software-programmable. It is wired to processor GPIO register bit PORTC6. The
LED is wired to be active high. The development kit software is implemented by default so that
this LED reflects "power” (and is, therefore, always lit).
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 13

Programming considerations Memory
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 14
Memory
Flash memory
Digi Connect SP and Digi Connect Wi-SP have 4 MB of flash memory, which is controlled by chip select
0, located at 0x02000000.
SDRAM memory
Digi Connect SP and Digi Connect Wi-SP have 16 MB of SDRAM memory, which is controlled by chip
select 1, located at 0x00000000 in the processor address space and aliased at 0x04000000 and
0x08000000. The application program (EOS) is loaded at address 0x08080000.
Reset button
Digi Connect SP and Digi Connect Wi-SP have have a push button connected to a GPIO pin. This pin is
named /INIT. In the processor, the GPIO register bit associated with /INIT is PORTC5. The GPIO pin
will read as high normally, and low when the button is pushed.
See Digi Connect SP hardware and Digi Connect Wi-SP hardware for the external location.

Specifications
Network interfaces
Digi Connect SP
nRJ-45 connector
n10/100Base-T
nHalf- and full-duplex support
Digi Connect Wi-SP
nStandard: IEEE 802.11b
nData Rate: Up to 11 Mbps with automatic fallback
nWEP (64-bit and 128-bit encryption)
nWPA (Wi-Fi Protected Access)/WPA2/802.11i
nFrequency: 2.4 GHz
nModulation: CCK (11/5 Mbps), DQPSK (2 Mbps), DBPSK (1 Mbps)
nTransmit power: 14 dBm typical
nReceive sensitivity:
l1Mbps: -92 dBm
l2Mbps: -89 dBm
l5.5Mbps: -87 dBm
l11Mbps: -82 dBm
nAntenna connector: RP-SMA
n10/100Base-T auto-sensing
nHalf- and full-duplex support
Serial interface
One EIA-232/422/485 switch-selectable serial port with full modem control.
Data rates (bps)
50, 110, 134, 150, 200, 300, 600, 1200, 2400, 3600, 4800, 9600, 19200, 38400, 57600, 115200, 230400
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 15

Specifications Flow control options
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 16
Flow control options
RTS/CTS, XON/XOFF, None
Environmental specifications
Specification Digi Connect SP Digi Connect Wi-SP
Ambient temperature -40° F to 185° F
(-40° C to 85° C)
-4° F to 185° F
(-20° C to 85° C)
Storage temperature -40° F to 257° F
(-40° C to 125° C)
-40° F to 257° F
(-40° C to 125° C)
Humidity 5% to 90% 5% to 90%
Altitude 12,000 feet
(3,657.60 meters)
12,000 feet
(3,657.60 meters)
Power requirements
The Digi Connect SP and Digi Connect Wi-SP must be powered by a Listed LPS or Class II power supply
rated 9-30 VDC, 0.37 A minimum.
Mechanical specifications
Digi Connect SP
nLength: 3.876 inches (9.846 cm)
nWidth: 1.680 inches (4.267 cm)
nHeight: 0.999 inches (2.537 cm)
nUnit Weight: 2.29 oz (64.92 g)
Digi Connect Wi-SP
nLength: 3.876 inches ( 9.846 cm)
nWidth: 1.680 inches (4.267 cm)
nHeight: 0.999 inches (2.537 cm)
nUnit Weight: 1.968 oz ( 55.792 g)
nAntenna: .408 oz (11.567 g)
nTotal Unit with Antenna: 2.376 oz (67.359 g)
Antenna information
Antenna strength and radiation patterns
The following diagram demonstrates the strength of the signal received by the antenna on both a
horizontal and vertical plane. The diagram shows the magnetic field when the antenna is in a vertical

Specifications Antenna information
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 17
position. The red line represents the horizontal plane and the dotted green lined represents the
vertical plane. You can see in the illustration that at 90degrees, the signal strength is, as expected, 0.
Antenna details
Antenna Description Dipole Desktop
Part number DC-ANT-24DP DC-ANT-24DT
Frequency 2.4~2.5 GHz 2.4~2.5 GHz
Power Output 2 W 1 W
DBGain 2 dBi 1.8 dBi
VSWR < or = 2.0 1.92 max
Dimension 10.0 x 108.5 mm 105 x 4.5 mm
Weight 10.5 g 11 g
Connector RP-SMA RP-SMA
Antenna restriction in North America
Only antennae of the same type listed on the FCC grant, with equal or lower antenna gain, may be
used with the Digi Connect Wi-SP.

Specifications Antenna information
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 18
Desktop antenna dimensions

Specifications Antenna information
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 19
Dipole antenna dimensions

Specifications Overlay specifications
Digi Connect SP and Digi Connect Wi-SP Hardware Reference 20
Overlay specifications
Digi Connect SP