User's Manual
HC864-AUTO Hardware User Guide
1vv0300946 Rev.4 – 2012-12-27
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Reserved. Page 57 of 77
11.6. Indication of Network Service Availability
The STAT_LED pin status shows information on the network service availability and Call
status. In the HC864-AUTO modules, the STAT_LED usually needs an external transistor to
drive an external LED. Because of the above, the status indicated in the following table is
reversed with respect to the pin status:
LED status Device Status
Permanently off Device off
Fast blinking
(Period 1s, Ton 0,5s)
Net search / Not registered /
turning off
Slow blinking
(Period 3s, Ton 0,3s)
Registered full service
Permanently on a call is active