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ST10F272M 数据表(PDF) 79 Page - STMicroelectronics |
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ST10F272M 数据表(HTML) 79 Page - STMicroelectronics |
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79 / 175 page  ST10F272M System reset 79/176 the on-chip voltage regulator functionality 10nF is sufficient: In any case, 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 nevertheless also recommended to avoid risks of damage in case of a temporary short between V18 and ground: The internal 1.8V drivers are sized to drive currents of several tens of Amps, so the current must be limited by the external hardware. The limit of current is imposed by power dissipation considerations (refer to Section 24: Electrical characteristics). In the next Figures 17 and 18 Asynchronous Power-on timing diagrams are shown, respectively with boot from internal or external memory, highlighting the reset phase extension introduced by the embedded Flash module when selected. Caution: Never power the device without keeping the RSTIN pin grounded: The device could enter into unpredictable states, risking also permanent damage. |
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