Telit Wireless Solutions SL869-V2 Series User Manual

SL869x-V2 Family Product User Guide
1VV0301175 Rev. 9 Page 29 of 93 2021-07-15
Not Subject to NDA
5. DATA RETENTION
(SL869-V2 and SL869L-V2S modules only)
The receiver is capable of retaining data elements under the various initialization types.
If Vbatt is maintained, no data will be lost.
The following table shows which data elements are saved under each type of initialization
if both Vcc and Vbatt are removed.
To erase EPO data, use the $PMTK127 command.
Data Retention (1)
Initialization
Almanac
Ephemeris
EPO
Host EPO
EASY
Position
Time
Power Cycle
Y (2)
Reset (signal)
Y
Full Cold Start
Y
(3)
Cold Start
Y
Y
Y
Y (3)
Warm Start
Y
Y
Y
Y
Y
Y
Hot Start
Y
Y
Y
Y
Y
Y
Y
Reacquisition
Y
Y
Y
Y
Y
Y
Y
Note 1: Command parameters (For example, UART speed, feature enables, etc.) are not preserved over a power cycle.
Note 2: EPO is not available on the MT3337 (ROM)-based modules. Use Host EPO.
Note 3: The standard definition of “Cold Start” does not allow time to be preserved.
Use “Full Cold Start” to compare with other vendor’s products’ “Cold Start”.
Table 5: Data Retention

Telit Wireless Solutions SL869-V2 Series Specifications

General

Brand	Telit Wireless Solutions
Model	SL869-V2 Series
Category	Receiver
Language	English