LE940B6 HW User Guide
Rev. 2.02
Page 85 of 111
2020-01-10
9.
Miscellaneous Functions
Indication of Network Service Availability
The STAT_LED pin status shows information on the network service availability and call
status. In the LE940B6 module, the STAT_LED usually needs an external transistor to
drive an external LED.
The status indicated in Table 33 is configurable. Refer to Ref 1: LE940B6 AT Command
Reference Guide for the full description of this function.
Table 33: Network Service Availability Indication
LED Status
Device Status
Permanently off
Device off
Fast blinking (Period depends on network condition)
Registered with power saving
Slow blinking (Period 3s, Ton 1s)
Registered with full service
Permanently on
A call is active
Figure 23: Status LED Circuit Example
RTC
– Real Time Clock
The VRTC pin is used to power the RTC only when the main battery voltage level is too
low or missing.
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