Fibocom FM350-GL - Status Indicator; LED#1 Signal

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FM350-GL Hardware Guide Page 39 of 67
3.6 Status Indicator
The FM350 module provides two signals to indicate the operating status of the module, and the status
indicator pins is shown in the following table:
Pin
Pin Name
I/O
Reset Value
Pin Description
Level
10
LED1#
O
T
System status LED, drain output.
3.3V
23
WOWWAN#
O
PD
Wake up host, Reserved
1.8V
LED#1 Signal
The LED#1 signal is used to indicate the operating status of the module, and the detailed description is
shown in the following table:
Module Status
LED1# Signal
RF function ON
Low level (LED On)
RF function OFF
High level (LED Off)
The LED driving circuit is shown in figure 3-18:
Figure 3-18 LED driving circuit
Note:
The resistance of LED current-limiting resistor is selected according to the driving voltage and
the driving current.