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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST10F272 датащи(PDF) 82 Page - STMicroelectronics |
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ST10F272 датащи(HTML) 82 Page - STMicroelectronics |
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82 / 179 page  System reset ST10F272 82/179 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 Electrical Characteristics Section). In next Figures 17 and 18 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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