STM32F205RFT6 Datasheet, PDF (72/178 Pages) List of Unclassifed Manufacturers – ARM-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/128+4KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera

Electrical characteristics
STM32F20xxx
6.3.2
Figure 21. Number of wait states versus f_CPU and V_DD range
Wait states vs Fcpu and VDD range
8
7
6
5
1.8 to 2.1V
2.1 to 2.4V
4
2.4 to 2.7V
2.7 to 3.6V
3
2
1
0
Fcpu (MHz)
ai18748b
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 V_DD.
VCAP1/VCAP2 external capacitor
Stabilization for the main regulator is achieved by connecting an external capacitor to the
VCAP1/VCAP2 pins. C_EXT is specified in Table 16.
Figure 22. External capacitor C_EXT
C
ESR
R _Leak
MS19044V2
1. Legend: ESR is the equivalent series resistance.
Symbol
Table 16. VCAP1/VCAP2 operating conditions⁽¹⁾
Parameter
Conditions
CEXT
ESR
Capacitance of external capacitor
ESR of external capacitor
2.2 µF
<2Ω
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DocID15818 Rev 11