AC530 Fastrax, AC530 Datasheet - Page 10

• Manufacturer Part Number: AC530
• Description: GPS Development Tools Application Board for UC530
• Manufacturer: Fastrax

Specifications of AC530

• Rohs: yes
• Product: Application Boards
• Tool Is For Evaluation Of: UC530
• Frequency: 1.575 GHz
• Operating Supply Voltage: 3.3 V
• Interface Type: UART
• Description/function: Fastrax Application Board AC530 provides the UC530 connectivity to the Fastrax Evaluation Kit or to other evaluation purposes
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Current: 25 mA

Page 10 of 39
2012-05-03
UC530_Datasheet
3. Periodic Mode: this mode allows autonomous power on/off with reduced fix rate to reduce average power
4. AlwaysLocate™ is an intelligent controller of the Periodic Mode; the main power supply VDD is controlled
consumption, see figure below; the main power supply VDD is controlled on/off externally by a power
switch that is controlled by the TIMER signal output, see reference circuit in chapter 7.1. Periodic Mode is
entered by sending the following NMEA command:
$PMTK225,<Type>,<Run_time>,<Sleep_time>,<2
where Type=1 for Periodic Backup Mode; Run_time = Full Power period (ms); Sleep_time =
Standby/Backup period (ms); 2
acquisition fails during the Run_time; 2
case GPS acquisition fails during the Run_time. Example: $PMTK225,1,3000,12000,18000,72000*16 for
periodic Mode with 3 sec Navigation and 12 sec sleep in Backup state. Acknowledge response for the
command is $PMTK001,225,3*35. The module can exit Periodic Mode by command $PMTK225,0*2B sent
just after the module has been wake up from previous sleep cycle.
on/off externally by a power switch that is controlled by the TIMER signal output, see reference circuit in
chapter 7.1. Depending on the environment and motion conditions, the module can autonomously and
adaptively adjust the parameters of the Periodic Mode, e.g. on/off ratio and fix rate to achieve a balance
in positioning accuracy and power consumption, see figure below. The average power drain can vary
based on conditions; typical average power is 3 mW. Associated profiles are: High and Low Speed,
Walking, Outdoor Static and Indoor. AlwaysLocate™ Mode is entered by sending the following NMEA
command: $PMTK225,<Mode>*<checksum><CR><LF>, where Mode=9 for AlwaysLocate™ in Backup
Mode. Example: $PMTK225,9*22. Acknowledge response for the command is $PMTK001,225,3*35. The
module can exit AlwaysLocate™ Mode by command $PMTK225,0*2B sent just after the module has been
wake up from previous sleep cycle.
nd
_run_time = Full Power period (ms) for extended acquisition in case GPS
Figure 3 AlwaysLocate™ Mode
Figure 2 Periodic Mode
nd
_sleep_time = Standby/Backup period (ms) for extended sleep in
nd
_run_time>,<2
nd
_sleep_time>*<checksum><CR><LF>,