Telit Wireless Solutions LN940 WWAN M.2, User Manual

Page: 29 / 56

3.3.3. LED Interface – Status Indicator
The LED signal is provided to enable add-in card to provide the RF status
indications to users via system-provided indicators.
Table 3.3.3 Status LED Interface
Signal Name Pin Voltage
Level Description
LED#1 (OD) 10 3.3V This is an “Active Low”
output signal intended to
drive system-mounted LED
indicators. When the state
is
“Low” the LED is lit to
indicate radio capable of
transmitting. When the
state is
“High” the LED is
NOT lit to indicate radio
incapable of transmitting.
Figure 3.3.3 LED-to-host Design recommendation