LTE Module Series
EG21-G Hardware Design
EG21-G_Hardware_Design 49 / 100
Table 17: Characteristic of ADC
Parameter
Min.
Typ.
Max.
Unit
ADC0 Voltage Range
0.3
VBAT_BB
V
ADC1 Voltage Range
0.3
VBAT_BB
V
ADC Resolution
15
Bits
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 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 pin definition and logic
level changes in different network status.
Table 18: Pin Definition of 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
Table 19: 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
NOTES
