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STM32F205ZCT7 数据表(PDF) 75 Page - STMicroelectronics |
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STM32F205ZCT7 数据表(HTML) 75 Page - STMicroelectronics |
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75 / 184 page  DocID15818 Rev 15 75/184 STM32F20xxx Electrical characteristics 183 Figure 21. Number of wait states versus fCPU and VDD range 1. The supply voltage can drop to 1.7 V when the device operates in the 0 to 70 °C temperature range and IRROFF is set to VDD. 6.3.2 VCAP1/VCAP2 external capacitor Stabilization for the main regulator is achieved by connecting an external capacitor to the VCAP1/VCAP2 pins. CEXT is specified in Table 16. Figure 22. External capacitor CEXT 1. Legend: ESR is the equivalent series resistance. Table 16. 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 |
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