Specifications

CINTERION

BGS12 Hardware Interface Description

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BGS12 HID_V00.915

Confidential / Released

2019

3.19 Fast Shutdown

BGS12 provides a dedicated fast shutdown signal. The FAST_SHTDWN line is an active low

control signal and it is recommended to be applied for at least 10 milliseconds. If unused this

pin can be left open because of a configured internal pull-up resistor.

By default, the fast shutdown feature is disabled. It has to be enabled using the AT command

AT^SCFG "MEShutdown/Fso". For details see [1].

If enabled, a low impulse >10 milliseconds on the FAST_SHTDWN line starts the fast shut-

down. The fast shutdown procedure still finishes any data activities on the module's flash file

system, thus ensuring data integrity, but will no longer deregister gracefully from the network,

thus saving the time required for network deregistration.

Please note that if enabled, the normal software controlled shutdown using AT^SMSO will

also be a fast shutdown, i.e., without network deregistration. However, in this case no URCs

including shutdown URCs will be provided by the AT^SMSO command.

BATT

+BB

BATT

+RF

VDDLP

EMERG_RST

VDIG

System shutdown

FST_SHDN

＜

200ms

Figure 37: Fast Shutdown timing