Telit Wireless Solutions FN990 Series - Graceful Shutdown

FN990
Family Hardware Design Guide
1VV0301752 Rev. 3 Page 39 of 92 2022-10-07
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 Graceful shutdown by FULL_CARD_POWER_OFF_N
Fast shutdown by GPIO triggered
6.2.2.1. Graceful Shutdown
To shutdown the FN990 Family module safely, host can use the graceful shutdown
function.
The graceful shutdown can be triggered by:
 FULL_CARD_POWER_OFF_N
6.2.2.1.1. Graceful Shutdown by FULL_CARD_OFF_N
To gracefully shutdown the FN990 , FULL_CARD_POWER_OFF_N should be asserted to
Low.
Once FULL_CARD_POWER_N is asserted to Low, the FN990 enters finalization state,
terminates active processes and prepares to turn off safely.
As shown in the diagram below, VREG_L6B_1P8 will indicate when the module is ready
to be turned off.
Figure 6: Graceful Shutdown by FULL_CARD_POWER_OFF_N