Network Status Indication - Quectel UC20 Hardware Design

3.15. Network Status Indication

The network indication pins can be used to drive a network status indicator LED. 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 17: Pin Definition of Network Indicator
Pin Name
NET_MODE
NET_STATUS
Table 18: Working State of the Network Indicator
Pin Name
NET_MODE
NET_STATUS
A reference circuit is shown in the following figure.
UC20_Hardware_Design
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Pin No. I/O Description
Indicate the module network
5 DO
registration mode.
Indicate the module network activity
6 DO
status.
Status
Always High
Always Low
Flicker slowly (200ms High/1800ms Low)
Flicker slowly (1800ms High/200ms Low)
Flicker quickly (125ms High/125ms Low)
Always High
Module
Network
Indicator
Figure 29: Reference Circuit of the Network Indicator
Description
Registered in 3G network
Others
Network searching
Idle
Data transfer is ongoing
Voice calling
VBAT
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UMTS/HSPA Module Series
UC20 Hardware Design
Comment
1.8V power domain
1.8V power domain
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