Fastrax ITrax02 User manual

REV 1.2
User Manual
ITrax02 Evaluation Kit
1.08
This manual explains the setting up of the Evaluation
Kit.
December 12, 2002
Fastrax Oy

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CHANGE LOG
Rev. Notes Date
1.0 Initial revision 12-12-2002
1.1 Added references 12-12-2002
1.2 Updated table of contents 12-12-2002

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CONTENTS
1. DESCRIPTION OF THE EVALUATION KIT .................................................... 5
1.1 External Interfaces...............................................................................5
1.2 AC/DC Power supply............................................................................6
1.3 RS232 cables........................................................................................7
1.4 On/Off/Reset switch.............................................................................8
1.5 Led Array..............................................................................................8
1.6 GPS antenna.........................................................................................8
2. IDC-40 I/O-CONNECTOR.............................................................................. 10
3. SETTING UP THE HARDWARE.................................................................... 12
3.1 Jumper settings for antenna bias (I/O-connector) ........................... 12
3.2 Jumper settings for Boot-mode select (I/O-connector) ................... 12
3.3 Jumper settings for serial interface (internal).................................. 12
3.4 Jumper settings for power supply (internal).................................... 12
3.5 Jumper setting for Antenna bias voltage shut-down (internal)....... 13
4. MOTHERBOARD PCB.................................................................................. 14
4.1 General Description ........................................................................... 14
4.2 PCB documents.................................................................................. 15
5. APPENDICES ............................................................................................... 16
5.1 Description of GPIO leds................................................................... 16
5.2 Schematics......................................................................................... 17
5.3 Components layout............................................................................ 18
5.4 BOM .................................................................................................... 19

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COMPLEMENTARY READING
The following reference documents are complementary reading for
this document:
Ref. # File name Document name
01 Install.pdf iTrax02 Evaluation Kit: Installation Guide
02 Uguide.pdf iTrax02 Evaluation Kit: GPS Workbench
Users Guide

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1. DESCRIPTION OF THE EVALUATION KIT
The following items are included in the Evaluation Kit
! Evaluation Kit including motherboard and iTRAX02
! AC/DC power supply
! Two RS232 cables (Null modem)
! GPS antenna
! Installation CD including GPS Workbench and
documentation
! Installation guide
Check that all items are included in the shipment before setting up the
system.
1.1 External Interfaces
The Evaluation Kit with the external interfaces is shown below.
15
69
234
78
1
2
39
40
GPIO15
ANTENNA BIAS
+3.3V /no jumper
+5.0V /with jumper
ANTENNA BIAS
NO BIAS /no jumper
WITH BIAS /with jumper
15
69
234
78
Port 0 Port 1 OFF-ON-Reset
40-pin I/O-conn.
ANT
GPIO 15 87 0
+
-
LED array

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Figure 1 Back panel of the Evaluation Kit
The following external interfaces are available:
! Antenna connector for external GPS antenna (SMA-female)
! DC-power connector (2.1mm socket)
! Two RS232 ports (DB9M)
! Off/On/Reset switch with built-in LED for power indication
! Two LED arrays for indicators (GPIO 0…15, active at “0”)
! 40-pin IDC-connector for external I/O interfaces
! GPIO 0…15, except 12 and 13 which are used internally
! Pulse measurement inputs PM0, PM1
! SPI bus
! 1PPS output
! XRESET (low active)
! Two jumpers for antenna bias selection (as described in
Figure 1 and in the following chapter). The antenna bias is
preset in factory for +5V.
! Connections are described in chapter 3.
NOTE! Be careful with static electricity! There are no extra
means for protection against static discharge other than the
CMOS-output clamping diodes of the baseband IC of
iTRAX02.
1.2 AC/DC Power supply
The Evaluation Kit is supplied with an AC/DC switch mode power
supply with the following properties:
! Wide range universal supply voltage 100-240VAC, 50-60Hz
! Output voltage: 6VDC, 2A (max 15W)
! Multi-standard mains plugs for UK, USA/Japan and EURO

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! Supplied with a 1.8m integral lead and 5 interchangeable
output plugs. Correct plug (2.1 mm) and polarity is preset
in factory.
NOTE! The suitable mains plug must be fitted prior usage.
NOTE! The suitable input voltage range is from +6 to +9VDC. A
direct connection from e.g. car battery (+12VDC) is not
recommended since the regulators may exceed the maximum
dissipation
.
1.3 RS232 cables
Two standard off-the-shelf Null-modem cables are included.
The cable uses two 9-pin female connectors as shown below:
12345
6789
12345
6789
1.8m
DB9F DB9F
Figure 2 Null modem cable with DB9F connectors
NOTE! Onwards from PCB revision D, the GPS Workbench
utilizes the RS232 RTS hand-shake signal to control
automatically the Boot-mode selection (GPIO15). This feature
may be omitted by using a manual jumper for GPIO15 and
then the following minimum cable connection works as well:

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2
3
RX
TX
2
3
RX
TX
5GND 5GND
Figure 3 Null modem cable with minimum connections
1.4 On/Off/Reset switch
The switch located on the back panel has a two-fold purpose:
1. Function as an ON/OFF switch
2. Function as an external RESET switch for the iTRAX02 receiver
The switch is of SPDT (Single Pole, Double Throw) – On-Off-Mom
type and the positions are following:
Position Function Comment
Left OFF Power off, LED turns off
Middle ON Power on, LED turns on
Right RESET Power on, LED is on, iTRAX02 gets RESET
Note that the switch returns to ON position after the switch is released
in the RESET position.
1.5 Led Array
The red led array indicates the corresponding GPIO 0…15 state: led
active means logical ‘low’ state (see Appendices for description of the
default firmware GPIO usage).
1.6 GPS antenna
The GPS antenna supplied with the Evaluation Kit is SM-66 from San
Jose Navigation Inc. The antenna is a high performance GPS patch
antenna with a low noise amplifier, suitable bias voltage is
+4.5…+5.5VDC. The net antenna gain including 5 meters cable loss
is about +20dB. Connect the antenna cable to the ANT connector
(SMA).

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The antenna is intended for magnet mounting. Place the antenna
outside, preferably on the roof with good whole sky satellite visibility.
If needed, the antenna installation can be extended with an extra
cable, but the cable loss should not exceed 10…15dB.

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2. IDC-40 I/O-CONNECTOR
The following I/O-connections are available at the back panel (pin 1 at
the upper right corner, pin 2 at the lower right corner etc.):
Table 1 IDC-40 I/O connector X6
Pin Signal Name In/Out Description
1 GPIO0 I/O General Purpose I/O (1)
2 GND Ground Power and signal ground
3 GPIO1 I/O General Purpose I/O (1)
4 GND Ground Power and signal ground
5 GPIO2 I/O General Purpose I/O (1)
6 GND Ground Power and signal ground
7 GPIO3 I/O General Purpose I/O (1)
8 GND Ground Power and signal ground
9 GPIO4 I/O General Purpose I/O (1)
10 GND Ground Power and signal ground
11 GPIO5 I/O General Purpose I/O (1)
12 GND Ground Power and signal ground
13 GPIO6 I/O General Purpose I/O (1)
14 GND Ground Power and signal ground
15 GPIO7 I/O General Purpose I/O (1)
16 GND Ground Power and signal ground
17 GPIO8 I/O General Purpose I/O (1)
18 GND Ground Power and signal ground
19 GPIO9 I/O General Purpose I/O (1)
20 GND Ground Power and signal ground
21 GPIO10 I/O General Purpose I/O (1)
22 GND Ground Power and signal ground
23 GPIO11 I/O General Purpose I/O (1)
24 GND Ground Power and signal ground
25 GPIO14 I/O General Purpose I/O (1)
26 GND Ground Power and signal ground
27 GPIO15 I/O General Purpose I/O (1)
28 GND Ground Power and signal ground
29 PM0 I Pulse measurement input 0
30 PM1 I Pulse measurement input 1
31 SPI_SDI I SPI Interface Data In
32 SPI_SDO O SPI Interface Data Out
33 SPI_SCK O SPI Interface Clock Out
34 SPI_XCS0 O SPI Interface Chip Select 0 Out
35 PPS O 1PPS signal output
36 XRESET_M I External Reset, Active Low
37 ANT_BIAS I Antenna bias for RF input
38 +V_ANT O Antenna bias DC Power Supply
39 GND Ground Power and signal ground
40 BIAS_SEL I Antenna bias selection (3.3/5.0VDC)

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(1): The uN8031 in iTRAX02 includes a keeper so that in the
Evaluation Kit the GPIO lines have pull-up resistors
of 4.7 kohms.
See also iTRAX02 Interface Description for further information.

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3. SETTING UP THE HARDWARE
3.1 Jumper settings for antenna bias (I/O-connector)
The antenna port on iTRAX02 can be supplied with an external bias.
On the Evaluation Kit the bias can be either +5V or +3.3V. The
following jumper settings are available on the 40-pin I/O-connector
(X6) on the back panel (see figure 1):
Antenna bias X6 I/O-connector jumper setting
No bias -
+3.3V 37 –38
+5V (factory default) 37 –38 and 39 – 40
3.2 Jumper settings for Boot-mode select (I/O-connector)
The iTRAX02 is factory preset for booting from the internal flash
memory. There is however the option for booting through RS232
interface (Port 0) by setting GPIO 15 to logical “0”. For this purpose a
jumper is placed across X6-27 – X6-28 (GPIO 15) on the 40-pin I/O-
connector on the back panel, see figure 1.
Onwards from PCB rev. D, the Boot-mode select is also controlled
automatically with GPS Workbench via RS232 RTS hand-shake
signal.
3.3 Jumper settings for serial interface (internal)
The RS232-interface is available as true RS232 signals (inverted +/-
10V) at connectors X3 (Port 0) and X5 (Port 1). This requires that the
jumpers across X25 are connected (factory default): X25-1 – X25-2,
X25-3 – X25-4, X25-5 – X25-6 and X25-7 – X25-8.
The serial interface signals (CMOS levels) are also available at
connector X25. In this case the jumpers must be removed.
3.4 Jumper settings for power supply (internal)
The jumpers across X4-1- X4-2 (+3V_BB) and X4-3 – X4-4 (+3V_RF)
provide separate voltages for the iTRAX02 receiver (factory default).

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3.5 Jumper setting for Antenna bias voltage shut-down (internal)
The jumper across X7-1- X7-2 provides an active shut-down of the
Antenna bias voltage (e.g. during sleep mode) that is controlled by
the GPIO13 from iTRAX02. If the jumper is omitted, the bias voltage
is always active.

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4. MOTHERBOARD PCB
4.1 General Description
The Evaluation Kit includes a motherboard PCB for providing the
necessary interface electronics and connectors for both iTRAX02 and
external interfaces located on the back panel.
The following figure shows the block diagram.
RS232
Port 0
RS232
Port 0
DC conn.
Motherboard PCB
Switch
RS232
Drivers iTRAX02
Power
Control
and
Regul.
I/O Connector
LEDs
Figure 4 Block diagram of motherboard PCB
The Power Control and Regulators block supplies the iTRAX02
module with suitable regulated voltages (A2, A5) and provides the
Power-On-Reset (POR) functionality (D4). It also provides a
selectable supply voltage (A1) for an antenna bias via the Antenna
Connector. Power switch is utilized with V2 and V1.
The RS232 Drivers block (D5) provides conversion between RS232
and CMOS levels.
The LED Arrays (D6, D7) are connected to the GPIO bus via CMOS-
drivers (D2, D3). The LED is active when corresponding GPIO line is
at low logical level “0”.

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4.2 PCB documents
The schematics of the motherboard electronics, the components
layout of the motherboard and the Bill of Materials (BOM) can be
found in Appendices.

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5. APPENDICES
5.1 Description of GPIO leds
The standard iTRAX02 firmware uses the GPIO for debug purposes,
see the following table (the led is active when the GPIO is at low
state).
LED MEANING TASK WHEN
0 Calculating pseudo-ranges MsgTask Low
1 Calculating new fix NavTask Low
2 Valid fix available NavTask Low
3 System error (Msg pool full) any Low
4 New subframe data Data_io Toggle
5 New track data Track_io Toggle
6 New acquisition data Acq_io Toggle
7 iTRAX02 running Control Toggle
8 Serial data to transmit ISR Low
9 Serial data received ISR Low
10 Serial data buffer overflow ISR Low
11 Wake-up from sleep mode Main Input
12 Flash device busy - Low
13 RF Amplifier on Main Low
14 Boot mode select (UART/SPI) - Input
15 Boot mode select (Flash/Serial) - Input

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5.2 Schematics

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5.3 Components layout

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5.4 BOM
Bill Of Materials for d.sch on 2001-11-16
---------------------------------------------------------------------------------------------
Item VAL# Qty Reference Part Name Manufacturer
---------------------------------------------------------------------------------------------
IC 74LV245D 2 D2-3 8x3-STATE TRANSCEIVER
CONNECTOR 4-353512-0 1 X2 2x20 0.50mm AMP/FASTRAX
D-CONNECTOR DE9PNF 2 X3 X5
PIN HEADER 2x20 1 X6 2X36N 6mm Au
CONNECTOR, COAX 85SMA-50-0-144 1 X10 SMA, FEMALE 90 DEGR SUHNER
PIN HEADER 1x2 2 X7 X8 2x36N 6mm Au
PIN HEADER 2x2 1 X4 2x36N 6mm Au
PIN HEADER 2x4 1 X25 2x36N 6mm Au
SWITCH SPDT 1 X1 CON-OFF-MOM
GPS-MODULE iTRAX02 1 Z1
IC MAX3222CWN 1 D5 RS232C TRANSCEIVER MAXIM
LED LED, BLUE 1 D1 5mm
LED ARRAY RTZ2081R 2 D6-7 8xRED ARRAY FARNELL
RESISTOR, SMD N/A 2 R11-12 1% 100 ppM 0805

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RESISTOR, SMD 33k2 3 R6 R15 R56 1% 100 ppM 0805
RESISTOR, SMD 39k2 1 R14 1% 100 ppM 0805
RESISTOR, SMD 56k2 1 R13 1% 100 ppM 0805
RESISTOR, TRIM 100k 2 R7 R57 TRIMMER 4mm SMD
IC LP2951ACM 3 A1-2 A5 V.REG. ADJ. 100mA SO8 NATIONAL
RESISTOR, ARRAY 8x4k7 2 REN1-2 8x4k7 10 % SIP9
COND, SMD 10n 4 C2 C9 C11 C103 20 % X7R 0805
TANT.EL.KOND 1u 5 C3 C13 C28-30 1U 20 % 16 V 1206
TANT.EL.KOND 10u 8 C1 C4-8 C10 C104 10U 20 % 16 V 6032
DIODE TMMBAT-48 1 V3 SCHOTTKY (MINIMELF)
RESISTOR, SMD 100k 4 R1 R5 R16 R55 5% 200ppm 0805
RESISTOR, SMD 10k 2 R2 R10 5% 200ppm 0805
RESISTOR, SMD 22k 3 R3 R17 R18 5% 200ppm 0805
RESISTOR, SMD 330k 1 R9 5% 200ppm 0805
RESISTOR, SMD 470R 17 R4 R69-84 5% 200ppm 0805
RESISTOR, SMD 8k2 1 R8 5% 200ppm 0805
FET IRML5103 1 V2 FET P-CHANNEL
TRANSISTOR BC849C 2 V1 V4 NPN SOT23 PHILIPS or EQ.
IC MAX700CSA 1 D4 VOLT. DETECT WITH RESET MAXIM