Users Manual

ME910C1 HW User Guide
1VV0301351 Rev.13 Page 49 of 106 2020-06-30
NOTE:
Consider voltage drop under max current conditions when defining
the voltage detector thereshold in order to avoid unwanted shutdown.
The capacitor is rated with the following formula:
TIP:
Make the same plot during system verification to check timings and
voltage levels.
5.6.2. Fast Shut Down by Software
The Fast Power Down can be triggered by AT command.
Forced USB boot
If standard firmware upgrade procedures are not possible, FORCED_USB_BOOT pin
must be set to 1.8V during poweron of ME910C1.
The input current is very low so 10K resistor can be used to keep this pin in HI state.
FORCED_USB_BOOT pin must be connected only during firmware upgrade operation
and normally it has to be left open.
FORCED_USB_BOOT pin must be available in the board throught test point for easy
connection to external 1.8V supply.