Product Info

LTE Standard Module Series
EC25 Series Hardware Design
EC25_Series_Hardware_Design 67 / 134
Table 20: Pin Definition of Network Connection Status/Activity Indicator
Table 21: Working State of Network Connection Status/Activity Indicator
A reference circuit is shown in the following figure.
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VBAT
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Module
Network
Indicator
Figure 29: Reference Circuit of the Network Indicator
Pin Name
Pin No.
I/O
Description
Comment
NET_MODE
5
DO
Indicate the module’s network
registration mode
1.8 V power domain
Cannot be pulled up
before startup
NET_STATUS
6
DO
Indicate the module’s network activity
status
1.8 V power domain
Pin Name
Logic Level Changes
Network Status
NET_MODE
Always High
Registered on LTE network
Always Low
Others
NET_STATUS
Flicker slowly (200 ms High/1800 ms Low)
Network searching
Flicker slowly (1800 ms High/200 ms Low)
Idle
Flicker quickly (125 ms High/125 ms Low)
Data transfer is ongoing
Always High
Voice calling