User's Manual

LTE Module Series
EC25Hardware Design
EC25_Hardware_DesignConfidential / Released 49 / 90
1)
meansthat this pin cannot be pulled up before startup.
Table 18: Working State of the Network Connection Status/Activity Indicator
Pin Name Logic Level Changes Network Status
NET_MODE
Always High Registered on LTE network
Always Low Others
NET_STATUS
Flicker slowly (200ms High/1800ms Low) Network searching
Flicker slowly (1800ms High/200ms Low) Idle
Flicker quickly (125ms High/125ms Low) Data transfer is ongoing
Always High Voice calling
A reference circuit is shown in the following figure.
Figure 25: Reference Circuit of the Network Indicator
3.15. STATUS
The STATUS pin is an open drain output for indicating the module’s operation status. You can connect it
to a GPIO of DTE with a pulled up resistor, or as LED indication circuit as below. When the module is
turned on normally, the STATUS will present the low state. Otherwise, the STATUS will present
high-impedance state.
NOTE