GLOBALSAT ET-314 GPS Engine Board - Manual (Page 16)

ET-314AC
High Performance GPS Engine Board
2010/4/1
- 16 -
Table B-3 Reset Configuration Bit Map
Bit Description
0☆
Data valid flag: 1 = Use data in ECEF X, Y, Z, Clock Offset, Time of Week and Week
number to initialize the receiver; 0 = Ignore data fields
1 Clear ephemeris from memory: blocks Snap or Hot Start from occurring
2 Clear all history (except clock drift) from memory: blocks Snap, Hot, and Warm Starts
3
Factory Reset: clears all GPS memory including clock drift. Also clears almanac stored
in flash memory
4 Enable Nav Lib data (YES = 1, NO = 0) ★
☆ For software that does not support initialized data (GSW3, GSWLT3, SiRFXTrac) setting this
bit may cause unpredictable results. Do not attempt to use initializing data.01
★ If Nav Lib data are enabled, the resulting messages are enabled: Clock Status (Message ID 7),
50BPS (Message ID 8), Raw DGPS (Message ID 17), NL Measurement Data (Message ID 28),
DGPS Data (Message ID 29), SV State Data (Message ID 30), and NL Initialized Data
(Message ID 31). All messages sent at 1 Hz. If SiRFDemo is used to enable Nav Lib data, the
bit rate is automatically set to 57600 by SiRFDemo.2
Table B-4 Reset Configuration - SiRFLoc Specific
Decimal Description
00
Perform a hot start using internal RAM data. No initialization data is used.
01 Use initialization data and begin in start mode. Uncertainties are 5 seconds time
accuracy and 300 km position accuracy. Ephemeris data in SRAM is used.
02 No initialization data is used, ephemeris data is cleared, and warm start performed
using remaining data in RAM.
03 Initialization data is used, ephemeris data is cleared, and warm start performed using
remaining data in RAM.
04 No initialization data is used. Position, time, and ephemeris are cleared, and a cold
start is performed.
08 No initialization data is used. Internal RAM is cleared and a factory reset is performed.