System reset
ST10F276E
sufficient: anyway, a maximum of 100nF on V18 pin should
not generate problems of over-current (higher value is
allowed if current is limited by the external hardware).
External current limitation is anyway recommended also to
avoid risks of damage in case of temporary short between
V18 and ground: the internal 1.8V drivers are sized to drive
currents of several tens of Ampere, so the current shall be
limited by the external hardware. The limit of current is
imposed by power dissipation considerations (Refer to
Chapter 23: Electrical characteristics).
In next figures 24 and 25 Asynchronous Power-on timing diagrams are reported,
respectively with boot from internal or external memory, highlighting the reset phase
extension introduced by the embedded Flash module when selected.
Note:
Never power the device without keeping RSTIN pin grounded: the device could enter in
unpredictable states, risking also permanent damages.
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Doc ID 12303 Rev 3
STMICROELECTRONICS [ ST ]
