Product Info

LTE Standard Module Series
EG91 Hardware Design
EG91_Hardware_Design 50 / 96
3.14. Network Status Indication
The module provides one network indication pin: NETLIGHT. The pin is used to drive a network status
indication LED.
The following tables describe the pin definition and logic level changes of NETLIGHT in different network
status.
Table 16: Pin Definition of Network Status Indicator
Pin Name
Pin No.
I/O
Description
Comment
NETLIGHT
21
DO
Indicate the module’s network activity status
1.8V power domain
Table 17: Working State of Network Status Indicator
Pin Name
Logic Level Changes
Network Status
NETLIGHT
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
A reference circuit is shown in the following figure.
4.7K
47K
VBAT
2.2K
Module
NETLIGHT
Figure 26: Reference Circuit of Network Status Indicator