User Guide

LM960 HW Design Guide
1VV0301485 Rev. 15 Page 44 of 88 2020-08-13
LM960 Initialization and Activation
Information – To verify if the LM960 has powered up properly, please
check through one of two conditions below:
(1) LM960 and the host should be connected via USB. When USB
driver is completely loaded, the module has powered on
without problems and is ready to accept AT commands.
(2) Monitoring Boot OK (Shutdown Indicator). To use Boot OK
(Shutdown Indicator), Boot OK(Shutdown Indicator) function
must be enabled through AT#SHDNIND. (Refer to the AT
User Guide document)
Information – Active low signals are labeled with a name that ends with
“_N”
Information – To avoid a back-powering effect, it is recommended to
avoid having any HIGH logic level signal applied to the digital pins of
the module when it is powered OFF or during an ON/OFF transition.
Power Off
Power off the device can be done in three different ways:
 Graceful Shutdown by USB AT command AT#SHDN
 Fast Shutdown by GPIO triggered or USB AT command AT#FASTSHDN