LTE Standard Module Series
EC25 Hardware Design
EC25_Hardware_Design 65 / 130
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
.
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
1.8V 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
