Telit Wireless Solutions SL869-V2 Series - 9.4. Serial I;O Ports

SL869x-V2 Family Product User Guide
1VV0301175 Rev. 9 Page 52 of 93 2021-07-15
Not Subject to NDA
Options for availability are:
• Disable
• After 1st fix
• 3D Fix only
• 2D/3D Fix only
• Always.
NMEA output (timestamp) can be configured to have a fixed latency behind the 1PPS
pulse of 460 to 485 ms via the $PMTK255 command. Default is variable latency.
These configurations will not be preserved across a power cycle or reset.
1PPS is disabled if the fix rate > 1 Hz.
Variation is ≈ 30 ns (1 σ).
The logic levels are shown in Table 27: Logic Levels: TX and 1PPS.
Serial I/O Ports
All modules include a primary UART serial port.
SL869L-V2: The secondary port is I
2
C. It can be changed to UART via $PMTK258 command
Note that the module will reset when the interface is changed.
SL869L-V2S: The secondary port is UART.