Product Info

LTE Module Series
EC25 Hardware Design
EC25_Hardware_Design 61 / 112
1. ADC input voltage must not exceed VBAT_BB.
2. It is prohibited to supply any voltage to ADC pins when VBAT is removed.
3. It is recommended to use a resistor divider circuit for ADC application.
3.15. Network Status Indication
The network indication pins can be used to drive network status indication LEDs. The module provides
two pins which are NET_MODE and NET_STATUS. The following tables describe the pin definition and
logic level changes in different network status.
Table 18: Pin Definition of Network Connection Status/Activity Indicator
Table 19: Working State of the Network Connection Status/Activity Indicator
Pin Name Pin No. I/O Description Comment
NET_MODE 5 DO
Indicate the module network
registration mode.
1.8V power domain
Cannot be pulled up
before startup
NET_STATUS 6 DO
Indicate the module 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
NOTES