User Manual
Table Of Contents
- Functional description
- 1.2 GPS performanc
- 1.3 Block diagram
- 1.4 Assisted GPS (A-GPS)
- 1.6.1 UART
- 1.6.2 USB
- 1.6.3 Serial Peripheral Interface (SPI)
- 1.7 Antenna
- 1.8 Power Management
- 1.9 Maximum Performance Mode
- 1.10 Eco Mode
- 1.11 Power Save Mode
- 2 Pin Definition
- 2.1 Pin assignment
- 3 Electrical specifications
- 3.1 Absolute maximum ratings
- 3.2 Operating conditions
- 3.3 SPI timing diagrams
- 3.4 Timing recommendations
- 4 Mechanical specifications
1.3 Block diagram
1.4 Assisted GPS (A-GPS)
Supply of aiding information like ephemeris, almanac, rough last position and time and satellite
status and an optional time synchronization signal will reduce time to first fix significantly and
improve the acquisition sensitivity. All GT-U7 modules support the u-blox AssistNow Online and
AssistNow Offline A-GPS services11 and are OMA SUPL compliant.
1.5 AssistNow Autonomous
AssistNow Autonomous provides functionality similar to Assisted-GPS without the need for a host
or external network connection. Based on previously broadcast satellite ephemeris data
downloaded to and stored by the GPS receiver, AssistNow Autonomous automatically generates
accurate satellite orbital data (
“
AssistNow Autonomous data
”
) that is usable for future GPS
position fixes. AssistNow Autonomous data is reliable for up to 3 days after initial capture.