User Guide

LM960 HW Design Guide
1VV0301485 Rev. 3 Page 37 of 74 2018-12-14
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
To turn off the LM960, SYSTEM_RESET_N pad must be asserted low more than 1
seconds and then it should be kept low.
When the SYSTEM_RESET_N is asserted low more than 1 seconds, LM960 goes into
the finalization state and after the end of the finalization process VREG_L6_1P8 will go to
low.
Usually, it takes LM960 less than 200 milliseconds from asserting SYSTEM_RESET_N
until reaching a complete shutdown. The DTE should monitor the status of VREG_L6_1P8
to observe the actual power-off.
Information – To completely shut down the LM960 module, the
SYSTEM_RESET_N pin must be asserted and kept low.
Otherwise, the LM960 will turn on again after shut down.
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.
Warning – Not following the recommended shut-down procedures
might damage the device and consequently void the warranty.