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FIBOCOM_NL952-NA_Hardware_User_Manual
Page 36 of 57
3.6 Status Indicator
The NL952 module provides two signals to indicate the operating status of the module, and the status
indicator pins as 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
Module wakes up Host (AP)
,
Reserved 1.8V
LED#1 Signal
The LED#1 signal is used to indicate the operating status of the module, and the detailed description as
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 3-19:
Figure 3-19 LED Driving Circuit
Note:
The resistance of LED current-limiting resistor is selected according to the driving voltage and
the driving current.
WOWWAN#
The WOWWAN# signal is used to wake the Host (AP) when there comes the data request. The definition
of WOWWAN# signal is as follows:
Operating Mode
WOWWAN# Signal
SMS or data requests
Pull low 1s then pull high (pulse signal) in default, the pulse can
be configured by AT command.
Idle/Sleep
High level