The logic levels are shown in Table 28: Logic Levels: ANT_ON.
9.3.3.3. ANT-OC (SL869L-V2 only)
This signal is a high true input. When the input is at logic 1, the receiver will output a
special NMEA message indicating the antenna line is open. The circuitry to drive this input
is external to the SL869-V2 module. This signal is only available on the SL869L-V2.
The logic levels are shown in Table 26: Input Logic Levels.
9.3.3.4. ANT-SC-N (SL869L-V2 only)
This signal is a low true input. When the input is at logic 0, the receiver will output a
special NMEA message indicating the antenna line is shorted. The circuitry to drive this
input is external to the SL869-V2 module.
This signal is only available on the SL869L-V2.
The logic levels are shown in Table 26: Input Logic Levels.
9.3.4. Control (Input) Signals
9.3.4.1. RESET-N (SL869L-V2 and SL869L-V2S only)
The Reset-N input is a low true input to reset the receiver to the default starting state.
This signal is not required for the module to operate properly, so this pin may be left
unconnected.
However, it is recommended to bring it out to a test point.
If used, the signal can only be driven low, never high since it has an internal pullup.
The logic levels are shown in Table 26: Input Logic Levels.
9.3.5. Output Signals
9.3.5.1. 1PPS
1PPS is a one pulse per output second signal. Its default characteristics are:
• Pulse duration: 100 ms
• Active: during 3D navigation.
The pulse availability and duration can be configured via the $PMTK285 command.
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