EVA2200-A Maestro Wireless Solutions, EVA2200-A Datasheet - Page 28

• Manufacturer Part Number: EVA2200-A
• Description: GPS Development Tools SiRFStar IV GPS Eval kit SMT ROM module
• Manufacturer: Maestro Wireless Solutions

Specifications of EVA2200-A

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: A2200-A
• Frequency: 1.575 GHz
• Operating Supply Voltage: 3.3 V
• Interface Type: USB
• Description/function: GPS Evaluation Kit EVA2200-A allows an easy evaluation of Maestro's SiRFstarIV GPS receiver module A2200-A
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Current: 50 mA
• Processor Used: SiRFstar IV

V1.0 – Feb-12
10 Applications and Hints
10.1 Initial Module Start
After initially applying power to the module, it is necessary to start the internal firm-
ware by toggling the ON_OFF pin. Toggling is done by pulling the signal to HIGH for
about 100ms. This first toggling can be done after a LOW – HIGH transmission is
detected at the WAKEUP pin or by simply waiting for 1s after power-up. In case of
configuration for UART mode, messages should be transmitted afterwards. If no
messages should appear, a new toggling should be applied.
10.2 Proper Shutdown
The A2200-A module requires an orderly shutdown process to properly stop internal
operation and complete any writes of critical data to BBRAM or EEPROM data area.
Abrupt removal or drop of main power while the system is running has risks ranging
from minor impact on TTFF to fatal, permanent corruption of EEPROM code area on
the module.
A controlled and orderly shutdown while the A2200-A is running in full power mode
can be initiated by
The shutdown is completed after maximum 1s. Therefore the module should be
supplied with voltage for that time after the shutdown sequence was initiated.
10.3 SiRFaware
SiRFaware
in position, time, and frequency, and to maintain valid current Ephemeris using either
data collected from satellites in view or Extended Ephemeris methods.
The SiRFaware
the SiRF Binary Protocol. Please refer to the appropriate manual. In order to request
a fix and to exit SiRFaware
done by pulling the signal to HIGH for about 100ms.
10.4 Push-to-Fix Mode
Push-to-Fix mode is designed for the application that requires infrequent position
reporting. The receiver generally stays in a low-power mode, up to 2 hours, but
wakes up periodically to refresh position, time, ephemeris data and RTC calibration.
The push-to-fix mode is initialized and entered using the SiRF Binary Protocol.
Please refer to the appropriate manual, paying particular attention to the paragraph
titled “Set TricklePower Parameters”. In order to request a fix outside the specified
 A 100ms pulse on the ON_OFF pin, or
 According messages either in NMEA or OSP mode.
TM
is a low-power operating mode that seeks to maintain low uncertainty
TM
mode is entered using the One Socket Protocol, an extension of
TM
Support
TM
it is necessary to toggle the ON_OFF pin. Toggling is
User’s Manual
Page 28 of 35