Maestro EVA2235-H User manual

GPS Evaluation Kit EVA2235-H
A Description of the Evaluation Board
for Maestro’s GPS Receiver / Smart Antenna Module A2235-H
User’s Manual
Version 0.1

V0.1–May-13
User’s Manual
Page 2 of 18
Revision History
Rev.
Date
Description
0.1
05-17-13
Initial Draft
mm-dd-yy
Name
Date
Signature
Written by
Happy wen
05-17-13
H W
Checked by
Sam Law, Matthieu
05-17-13
S L,M
Approval by
Frank Tang, Calvin Yau
05-17-13
F T,C Y

V0.1–May-13
User’s Manual
Page 3 of 18
Disclaimer
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF MAESTRO
WIRELESS SOLUTIONS LIMITED. IT MAY NOT BE COPIED OR TRANSMITTED
BY ANY MEANS, PASSED TO OTHERS, OR STORED IN ANY RETRIEVAL
SYSTEM OR MEDIA, WITHOUT PRIOR CONSENT OF MAESTRO OR ITS
AUTHORIZED AGENTS.
THE INFORMATION IN THIS DOCUMENT IS, TO THE BEST OF OUR
KNOWLEDGE, ENTIRELY CORRECT. HOWEVER, MAESTRO CAN NEITHER
ACCEPT LIABILITY FOR ANY INACCURACIES, OR THE CONSEQUENCES
THEREOF, NOR FOR ANY LIABILITY ARISING FROM THE USE OR
APPLICATION OF ANY CIRCUIT, PRODUCT, OR EXAMPLE SHOWN IN THE
DOCUMENT.
THE PRODUCT (HARD- AND SOFTWARE) DESCRIBED IN THIS
DOCUMENTATION IS NOT AUTHORIZED FOR USE IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF MAESTRO.
THIS DOCUMENT MAY PROVIDE LINKS TO OTHER WORLD WIDE WEB SITES
OR RESOURCES. BECAUSE MAESTRO HAS NO CONTROL OVER SUCH SITES
AND RESOURCES, MAESTRO SHALL NOT BE RESPONSIBLE FOR THE
AVAILABILITY OF SUCH EXTERNAL SITES OR RESOURCES, AND DOES NOT
ENDORSE AND IS NOT RESPONSIBLE OR LIABLE FOR ANY CONTENT,
ADVERTISING, PRODUCTS, OR OTHER MATERIALS ON OR AVAILABLE FROM
SUCH SITES OR RESOURCES. MAESTRO SHALL NOT BE RESPONSIBLE OR
LIABLE, DIRECTLY OR INDIRECTLY, FOR ANY DAMAGE OR LOSS CAUSED OR
ALLEGED TO BE CAUSED BY OR IN CONNECTION WITH USE OF OR
RELIANCE ON ANY SUCH CONTENT, GOODS OR SERVICES AVAILABLE ON
OR THROUGH ANY SUCH SITE OR RESOURCE.
MAESTRO RESERVES THE RIGHT TO CHANGE, MODIFY, OR IMPROVE THIS
DOCUMENT OR THE PRODUCT DESCRIBED HEREIN, AS SEEN FIT BY
MAESTRO WITHOUT FURTHER NOTICE.

V0.1–May-13
User’s Manual
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Table of Contents
1 Introduction........................................................................................................5
1.1 Purpose.............................................................................................................5
1.2 Contents............................................................................................................5
2 Handling Precautions ........................................................................................5
3 Quick Start (using USB connection) ................................................................6
4 On-Board Peripherals........................................................................................9
4.1 RESET and ON_OFF Push-Button...................................................................9
4.2 External Antenna Connector.............................................................................9
5 LED’s.................................................................................................................10
6 Design-in Support............................................................................................11
6.1 Terminal Block ................................................................................................11
6.2 DIP Switch Settings.........................................................................................12
6.3 Configure the baud rate ..................................................................................13
6.4 ICC Jumper.....................................................................................................14
7 NMEA Port ........................................................................................................14
8 Board Overview................................................................................................15
9 Board Schematics............................................................................................16
10 Related Information .......................................................................................17
10.1 Contact..........................................................................................................17
10.2 Related Documents.......................................................................................17
10.3 Related Tools................................................................................................17
11 List of Figures ................................................................................................18
12 List of Tables..................................................................................................18

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User’s Manual
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1 Introduction
1.1 Purpose
The GPS Evaluation Kit EVA2235-H allows an easy evaluation of Maestro’s GPS
receiver /smart antenna module A2235-H by offering quick access to the ports of the
module.
The EVA2235-H serves three major purposes:
As a demonstration package of the module’s capabilities
Powering the A2235-H GPS receiver module via the USB connector with suffi-
cient view to the sky will result in an NMEA output with position information.
As an example how to integrate the module into a system
The schematic in chapter “9 Board Schematics” is a basic example of how to
integrate the GPS module into an application or system.
To support an easy temporary design in
The signals provided on the Evaluation Kit allow direct integration into a sur-
rounding system making it an ideal development tool.
The EVA2235-H can especially demonstrate that the on-module GPS antenna and
an external active GPS antenna connected tothe External Antenna input will result in
outstanding GPS performance. The user can switch between the two antennas with
the ANT_SW signal provided by the DIP switch.
1.2 Contents
The EVA2235-H includes the following components:
Demonstration board (labeled EVA2235-H) with one A2235-H GPS receiver /
smart antenna
Active GPS antenna
USB cable to connect to your PC
CD with complete documentation and Maestro’s GPS Cockpit software
Please check your package for completeness and connect the components properly.
2 Handling Precautions
The EVA2235-H contains components that are sensitive to electrostatic discharge
(ESD). Please handle with appropriate care.

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3 Quick Start (using USB connection)
(1) Connect the EVA2235-H with your PC using the included USB cable.
(2) When the PC asks for drivers select the folder “Tools\Drivers” on the included CD
ROM. Note that two drivers need to be installed, the EVA2235-H FTDI driver and
the USB serial driver.
Note: During the driver installation process your Windows system will probably
notify you, that the driver did not pass Windows logo testing with a warning:
Figure 1: Windows driver installation warning
Note: After successful driver installation Windows might interpret the data
coming over the serial interface as a serial ballpoint mouse! Your mouse pointer
can start jumping around. To stop this, disable the according device using your
device manager. Leave the EVA2235-H kit connected and press and keep
pressing the reset button. You will find the device under “Mice and other pointing
devices”. Use a right click to open the sub-menu and disable the device.
Figure 2: Disabling of Microsoft Serial BallPoint
(3) Assure that the on-module GPS antenna has a good view to the sky!
Update Driver
Disable
Uninstall
Scan for hardware changes
Properties

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User’s Manual
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(4) To start the GPS Cockpit software which visualizes the NMEA output data coming
from the GPS receiver, copy all files from the included CD ROM “Tools/GPS
Cockpit” to a folder of you choice on your PC. Then double click the GPSC.exe file.
The GPS cockpit software starts without additional software installation.
(5) Now you need to activate the correct port within GPS Cockpit. You can do this by
selecting “COM port connection”. A detailed description of the GPS Cockpit
software is included on the CD ROM. In any case, the following window will
appear:
Figure 3: GPS Cockpit communication window - blank
Activate “Terminal 1”, choose the COM port to which the GPS receiver is con-
nected (verify in your system settings - device manager, which communication
port is used for this USB serial connection), in our example COM2 at 4800 baud
(default setting for the EVA2235-H), and click on “OK”:
Figure 4: GPS Cockpit communication window –COM2
The connection is established now.
(6) Open a terminal window to see NMEA sentences by using the “NMEA Terminal”
window button. You should then see messages like this:

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User’s Manual
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Figure 5: GPS Cockpit NMEA terminal with NMEA data
Now you can start using all the other windows and features of GPS Cockpit. Please
refer also to the GPS Cockpit manual and the online help within GPS Cockpit.

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4 On-Board Peripherals
4.1 RESET and ON_OFF Push-Button
The EVA2235-H holds two push-buttons:
nRST (RESET)
ON_OFF
After power on by pushing the “ON” button will start the A2235-H module. This is
absolutely necessary to get the module going. The “ON” button must be used as well
in other cases, e.g.in order to request a position when in SiRFawareTM state or to go
to hibernate mode and wake up again.
The “nRST” button is used to get a full reset of the GPS module. All parameters are
stored in non-volatile memory. After pushing this button the module starts again from
the beginning.
4.2 External Antenna Connector
The A2235-H supports two antenna inputs:
The on-module antenna.
The antenna connector “External Antenna” leads to pin 10 of the A2235-H GPS
receiver which supports active GPS antennas.
It can be switched between the two antenna inputs by using the ANT_SW pin of the
A2235-H connected to the DIP switch on board the EVA2235-H evaluation kit.
Setting the DIP switch to “OFF” means the on-module is activated.
Setting the DIP switch to “ON” means the External Antenna input is activated.
Figure 6: On-module antenna and External Antenna Connector
On-module antenna
External Antenna

V0.1–May-13
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Further information is given in
Chapter “6.2 DIP Switch Settings” and
Maestro’s GPS Receiver A2235-H User Manual
5 LED’s
There are 6 LEDs on the EVA2235-H that indicate different signals from the GPS
receiver (order of LED’s on EVA2235-H from left to right):
LED
Name
Function
Description
D2
TX
Transmit
Serial data traffic (from GPS receiver)
D1
RX
Receive
Serial data traffic (into GPS receiver)
D5
1PPS
Timing
1PPS signal at rising edge (1 pulse per second,
duration 500ms typ.)
D3
ON_OFF
Hibernate
Toggle hibernate mode / position request during PTF
cycle (the LED visualizes the ON_OFF pulse)
D4
WAKEUP
Operational
state
HIGH: Full operation
LOW: Module in a low power mode
D6
Power / VCC
POWER
Power on LED
Table 1: LED’s function and description
Figure 7: EVA2235-H LED’s

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6 Design-in Support
The EVA2235-H demo board offers the possibility to implement the A2235-H GPS
receiver module temporarily into your design by using the terminal block with 15
connections & a pad of 3V3. To operate the EVA2235-H via this terminal block,
please check “Table 3: Switch settings”.
Please note:
VCC power input is not protected against reversed polarity
External supply has to be within the range of 3.3 to 3.6 VDC
6.1 Terminal Block
The terminal block offers direct access to the A2235-H GPS receiver pins.
Pin
Port
1
VCC
2
GPIO7, SPI chip select pin when module works in SPI mode
3
GPIO6, SPI clock pin when module works in SPI mode
4
nRST
5
ON_OFF
6
Host Port I2C_CLK
7
GND
8
TX,SPI data out pin when module works in SPI mode
9
RX, SPI data in pin when module works in SPI mode
10
I2C_CLK, GPIO 1
11
I2C_DIO, GPIO 0
12
Vout, Voltage Output 1.8V
Table 2: Terminal block description
Figure 8: Terminal block

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6.2 DIP Switch Settings
The following picture shows the DIP switches of the EVA2235-H.
Figure 9: DIP switches
Switch
Function
Operation via USB connector
(default settings)
Operation via
terminal block
S1
GPIO7
OFF
OFF
S2
GPIO6
ON
OFF
S3
ANT_SW
ON = high (A2235-H pin 10, external active
antenna)
not applicable
OFF = low (A2235-H on-module antenna)
S4
nRST
ON
OFF
S5
ON_OFF
ON
OFF
S6
TX
ON
OFF
S7
RX
ON
OFF
S8
VCC
ON
OFF
Table 3: Switch settings

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6.3 Configure the baud rate
Baud rate and protocol selection can be set upon start up through GPIO configura-
tion.A2235-H can be configured to output NMEA at standard baud rates, if
the A2235-H is using the UART host interface.
Table 4 lists the settings for GPIO 0 andGPIO 1 to configure the baud rate at start-up.
After start-up, the GPIOs can be used for other purposes.
J9 (GPIO 0/ I2C_DIO)
J8 (GPIO 1 / I2C_CLK)
Protocol
Baud Rate
Pull high
Pull high
NMEA
4800
Pull high
Pull low
NMEA
9600
Pull low
Pull high
NMEA
38400
Pull low
Pull low
OSP
115200
Remark: Pull high/low =2.2K
Table 4: GPIO 0 and GPIO 1 Settings
Figure 10: Configure the baud rate jumper
Note: This feature is not available if any MEMS or non-volatile memory devices
are attached to the auxiliary serial bus. The internal software default baud rate
is NMEA 4800 when an EEPROM is connected.

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6.4 ICC Jumper
Figure 11: ICC jumper
As long as the VCC DIP switch is “ON” the ICC jumper is bridged. By putting the VCC
DIP switch to the OFF position the current draw of the A2235-H GPS receiver can be
measured directly by connecting a low resistance measurement device to the ICC
jumper.
The low resistance measurement device should be connected before VCC is
switched off!
7 NMEA Port
Default setting: 4800 baud, 8 data bits, no parity, 1 stop bit, no flow control!
Standard NMEA-0183 output on NMEA, baud rate selectable.
Standard USB connectors

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8 Board Overview
Figure 12: Board overview

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9 Board Schematics
Figure 13: EVA2235-H board schematics

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10 Related Information
10.1 Contact
This manual was created with due diligence. Wehope that it will be helpful to the user
to get the most out of the GPS module.
Inputs regarding errors or mistaken verbalizations and comments or proposals to
Maestro, HongKong, for further improvements are highly appreciated.
Maestro Wireless Solutions Limited
Add:Unit 3603-09,36/F.,118 Connaught Road West,HK
Main Line: (852) 28690688
Fax: [phone]
[e-mail]
www.maestro-wireless.com
10.2 Related Documents
GPS Receiver A2235-H (Maestro)
10.3 Related Tools
GPS Cockpit (Maestro)
SiRFLive (SiRF)
SiRF Flash(SiRF)

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11 List of Figures
Figure 1: Windows driver installation warning...........................................................6
Figure 2: Disabling of Microsoft Serial BallPoint .......................................................6
Figure 3: GPS Cockpit communication window - blank.............................................7
Figure 4: GPS Cockpit communication window –COM2..........................................7
Figure 5: GPS Cockpit NMEA terminal with NMEA data...........................................8
Figure 6: On-module antenna and External Antenna Connector ..............................9
Figure 7: EVA2235-H LED’s ...................................................................................10
Figure 8: Terminal block..........................................................................................11
Figure 9: DIP switches............................................................................................12
Figure 10: Configure the baud rate jumper .............................................................13
Figure 11: ICC jumper.............................................................................................14
Figure 11: Board overview......................................................................................15
Figure 13: EVA2235-H board schematics...............................................................16
12 List of Tables
Table 1: LED’s function and description..................................................................10
Table 2: Terminal block description.........................................................................11
Table 3: Switch settings..........................................................................................12
Table 4: GPIO 0 and GPIO 1 Settings ....................................................................13

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