EVA2200-A Maestro Wireless Solutions, EVA2200-A Datasheet - Page 29

• 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

duty cycles, it is necessary to toggle the ON_OFF pin. Toggling is done by pulling the
signal to HIGH for about 100ms.
10.5 Hibernate Mode
In order to enter Hibernate Mode it is necessary to send a shutdown command or to
toggle to ON_OFF pin by pulling the signal to HIGH for about 100ms. Starting with
firmware version 4.0.1 the according command is supported in NMEA and SiRF
Binary mode. After a short delay the module will switch into hibernate mode. The
RTC will keep on running and SRAM is backed with the typical current of 20 μA
drawn from Vcc. To wake the module up again, toggling the ON_OFF pin is neces-
sary (100ms pulse width).
10.6 Extended Ephemeris
The receiver is capable of supporting two versions of using Extended Ephemeris
(EE) data. The first one is the version, where the EE data are calculated on a server,
are transmitted to device incorporating the receiver, and are then loaded into the
receiver. These data can be valid for up to seven days.
The second version is the internal extrapolation of available “natural” Ephemeris
data. This is done automatically and no external support is required. The internally
calculated EE data are valid for up to 3 days.
The receiver firmware will define which set of EE data to use or will neglect those in
case “natural” data are
available(need add an external EEPROM
part). Both versions
TM
of EE data will help to further lower power consumption in SiRFaware
mode.
V1.0 – Feb-12
User’s Manual
Page 29 of 35