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STM32F207IC Datasheet(PDF) 66 Page - STMicroelectronics |
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STM32F207IC Datasheet(HTML) 66 Page - STMicroelectronics |
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66 / 177 page  Electrical characteristics STM32F20xxx 66/177 Doc ID 15818 Rev 9 Figure 19. 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. 5.3.2 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 14. Figure 20. External capacitor CEXT 1. Legend: ESR is the equivalent series resistance. ai18748b 0 1 2 3 4 5 6 7 8 Fcpu (MHz) Wait states vs Fcpu and VDD range 1.8 to 2.1V 2.1 to 2.4V 2.4 to 2.7V 2.7 to 3.6V Table 14. 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 MS19044V1 ESR R Leak C |
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