Users Manual

LTE Standard Module Series
EC25 Hardware Design
EC25_Hardware_Design
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Table 21: Working State of Network Connection Status/Activity Indicator
A reference circuit is shown in the following figure.
Figure 29: Reference Circuit of the Network Indicator
3.18. STATUS
The STATUS pin is an open drain output for indicating the module’s operation status. It can be connected
to a GPIO of DTE with a pull-up resistor, or as LED indication circuit as below. When the module is turned
NET_MODE 5 DO
Indicate the module’s network
registration mode
1.8V power domain
Cannot be pulled up
before startup
NET_STATUS 6 DO
Indicate the module’s network activity
status
1.8V power domain
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