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STM32F217VG 数据表(PDF) 104 Page - STMicroelectronics |
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STM32F217VG 数据表(HTML) 104 Page - STMicroelectronics |
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104 / 175 page ![]() Electrical characteristics STM32F21xxx 104/175 DocID17050 Rev 9 Input/output AC characteristics The definition and values of input/output AC characteristics are given in Figure 36 and Table 47, respectively. Unless otherwise specified, the parameters given in Table 47 are derived from tests performed under the ambient temperature and VDD supply voltage conditions summarized in Table 13. Table 47. I/O AC characteristics(1) OSPEEDRy [1:0] bit value(1) Symbol Parameter Conditions Min Typ Max Unit 00 fmax(IO)out Maximum frequency(2) CL = 50 pF, VDD > 2.70 V - - 4 MHz CL = 50 pF, VDD > 1.8 V - - 2 CL = 10 pF, VDD > 2.70 V - - 8 CL = 10 pF, VDD > 1.8 V - - 4 tf(IO)out/ tr(IO)out Output high to low level fall time and output low to high level rise time CL = 50 pF, VDD = 1.8 V to 3.6 V -- 100 ns 01 fmax(IO)out Maximum frequency(2) CL = 50 pF, VDD > 2.70 V - - 25 MHz CL = 50 pF, VDD > 1.8 V - - 12.5 CL = 10 pF, VDD > 2.70 V - - 50(3) CL = 10 pF, VDD > 1.8 V - - 20 tf(IO)out/ tr(IO)out Output high to low level fall time and output low to high level rise time CL = 50 pF, VDD >2.7 V - - 10 ns CL = 50 pF, VDD > 1.8 V - - 20 CL = 10 pF, VDD > 2.70 V - - 6 CL = 10 pF, VDD > 1.8 V - - 10 10 fmax(IO)out Maximum frequency(2) CL = 40 pF, VDD > 2.70 V - - 25 MHz CL = 40 pF, VDD > 1.8 V - - 20 CL = 10 pF, VDD > 2.70 V - - 100(3) CL = 10 pF, VDD > 1.8 V - - 50(3) tf(IO)out/ tr(IO)out Output high to low level fall time and output low to high level rise time CL = 40 pF, VDD > 2.70 V - - 6 ns CL = 40 pF, VDD > 1.8 V - - 10 CL = 10 pF, VDD > 2.70 V - 4 CL = 10 pF, VDD > 1.8 V - 6 |
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