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FIBOCOM NL668-EAU-MiniPCIe-10 Hardware User Manual
Page 29 of 56
Figure 3-11 UART Signal Connection 2
Note:
This level shift circuit is not suitable for applications with baud rates above 460Kbps.
3.7 Status Indicator
The module provides one signal for displaying the operating status of the module. The status indication
pin is shown in the following table.
Pin Name
I/O
Pin Num
Description
NET_MODE
O
42
Module status indication
Table 3-14 Status Indication
3.7.1 NET_MODE Signal
The module provides a network indicator NET_MODE output signal interface.
The status indicator description in the following table.
Mode Module Network indicator pin status
Indicator light
flash/off status
Description
1
600ms Low /600ms High
Flash
600ms on /600ms off
No SIM card
Request SIM PIN
Registering network (T<15S)
Register network failed
2
3000ms Low /75ms High
Slow flash
3000ms on/75ms off
Standby
