UMTS/HSPA+ Module Series
UC200A-GL_Hardware_Design 47 / 78
Table 23: Working State of the Network Connection Status/Activity Indication
4.7 K
47 K
VBAT
2.2 K
Module
NET_STATUS
Figure 26: Reference Circuit of the Network Status Indication
4.8.2. STATUS
The
STATUS pin is an open drain output for module’s operation status indication. It can be connected to a
GPIO of DTE with a pulled-up resistor, or as an LED indication circuit as below. When the module is
turned on normally, the STATUS will present the low state. Except for this, the STATUS will present
high-impedance state.
The following figure shows different circuit designs of STATUS, and you can choose either one according
to the application demands.
Pin Name
Status
Description
NET_MODE
Always High
Registered on UMTS network
Always Low
Others
NET_STATUS
Flicker slowly (200 ms High/1800 ms Low)
Network searching
Flicker slowly (1800 ms High/200 ms Low)
Idle
Flicker quickly (125 ms High/125 ms Low)
Data transfer is ongoing
Always High
Voice calling