User's Guide

UL865 Hardware User Guide
1VV0301050 Rev 2 – 2013-10-09
The STAT_LED pin status shows information on the network service availability and Call
status. The function is available as alternate function of GPIO_08 (to be enabled using the
AT#GPIO=8,0,2 command).
In the UL865 modules, the STAT_LED needs an external transistor to drive an external LED.
Therefore, the status indicated in the following table is reversed with respect to the pin status.
Device Status
LED status
Device off
Permanently off
Not Registered
Permanently on
Registered in idle
Blinking 1sec on + 2 sec off
Registered in idle + power saving
It depends on the event that triggers the wakeup (In
sync with network paging)
Voice Call Active
Permanently on
Dial-Up
Blinking 1 sec on + 2 sec off
A schematic example could be: