Telit Wireless Solutions FN990 Series Hardware Design Guide

FN990 Family Hardware Design Guide
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2024-05-29
Figure 9: Unconditional Hardware Reset by SYS_RESIN_N
Note: *Shutdown Indicator is an optional function. If SHDIND is enabled, it can
verify the status via the SHDIND function.
Please refer to the AT commands user guide document.
** The stated total reset time is an approximate measure of the latest SW and HW
combination. The shutdown time may be lengthened or shortened depending on
the SW configuration, SW, or HW version.
Note: Unconditional hardware reset must be used only as an emergency
procedure, and not as a normal power-off operation.
Note: Do not use any pull-up resistor on the RESET_N line or any totem pole digital
output. Using a pull-up resistor may cause latch-up problems on the FN990 Family
power regulator and improper functioning on the module.
The RESET_N line must be connected only in an open-collector configuration.
The below figure shows a simple circuit for this action.
Figure 10: Example Circuit for RESET by SYSTEM_RESET_N

Telit Wireless Solutions FN990 Series Specifications

General

Brand	Telit Wireless Solutions
Model	FN990 Series
Category	Computer Hardware
Language	English