UM4B0 User Manual
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6
Antenna Detection
1
The UM4B0 module offers antenna open/short detection. The corresponding pins
are ANT_NLOAD and ANT_FFLG.
Ant_Nlod
Ant_Fflg
Status
Status Description
1
1
On
Normal
0
1
Off
Open
1
0
Short
Short
0
0
RSV
RSV
The current monitoring chip outputs 2 bit high and low voltage; the software
portion sets 2 bit IO of corresponding NII as input pull-up, and then queries the
status of 2 bit IO to check the antenna state.
If ANT_PWR malfunctions, the query result is invalid.
If the antenna is not fed by ANT_PWR but by other means, the query result is
invalid.
7
Firmware Upgrade
Uprecise software is used for the remote update of UM4B0. Please follow the steps
below to upgrade the device:
Figure 7-1 Update Interface
Click “…” to browse the firmware update package, and click “Start” to start the
firmware upgrading process (uncheck software reset):
1
Optional by Firmware
