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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F745VG датащи(PDF) 101 Page - STMicroelectronics |
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STM32F745VG датащи(HTML) 101 Page - STMicroelectronics |
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101 / 227 page  DocID027590 Rev 4 101/227 STM32F745xx STM32F746xx Electrical characteristics 195 5.3.3 Operating conditions at power-up / power-down (regulator ON) Subject to general operating conditions for TA. Table 20. Operating conditions at power-up / power-down (regulator ON) 5.3.4 Operating conditions at power-up / power-down (regulator OFF) Subject to general operating conditions for TA. 5.3.5 Reset and power control block characteristics The parameters given in Table 22 are derived from tests performed under ambient temperature and VDD supply voltage conditions summarized in Table 17. Table 19. VCAP1/VCAP2 operating conditions(1) 1. When bypassing the voltage regulator, the two 2.2 µF VCAP capacitors are not required and should be replaced by two 100 nF decoupling capacitors. Symbol Parameter Conditions CEXT Capacitance of external capacitor 2.2 µF ESR ESR of external capacitor < 2 Ω Symbol Parameter Min Max Unit tVDD VDD rise time rate 20 ∞ µs/V VDD fall time rate 20 ∞ Table 21. Operating conditions at power-up / power-down (regulator OFF)(1) 1. To reset the internal logic at power-down, a reset must be applied on pin PA0 when VDD reach below 1.08 V. Symbol Parameter Conditions Min Max Unit tVDD VDD rise time rate Power-up 20 ∞ µs/V VDD fall time rate Power-down 20 ∞ tVCAP VCAP_1 and VCAP_2 rise time rate Power-up 20 ∞ VCAP_1 and VCAP_2 fall time rate Power-down 20 ∞ |
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