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STM32F407IE 데이터시트(PDF) 121 Page - STMicroelectronics |
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STM32F407IE 데이터시트(HTML) 121 Page - STMicroelectronics |
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121 / 180 page ![]() STM32F405xx, STM32F407xx Electrical characteristics Doc ID 022152 Rev 3 121/180 USB HS characteristics Table 60 shows the USB HS operating voltage. Figure 44. ULPI timing diagram Table 60. USB HS DC electrical characteristics Symbol Parameter Min.(1) 1. All the voltages are measured from the local ground potential. Max.(1) Unit Input level VDD USB OTG HS operating voltage 2.7 3.6 V Table 61. USB HS clock timing parameters(1) 1. Guaranteed by design, not tested in production. Parameter Symbol Min Nominal Max Unit fHCLK value to guarantee proper operation of USB HS interface 30 MHz Frequency (first transition) 8-bit ±10% FSTART_8BIT 54 60 66 MHz Frequency (steady state) ±500 ppm FSTEADY 59.97 60 60.03 MHz Duty cycle (first transition) 8-bit ±10% DSTART_8BIT 40 50 60 % Duty cycle (steady state) ±500 ppm DSTEADY 49.975 50 50.025 % Time to reach the steady state frequency and duty cycle after the first transition TSTEADY -- 1.4 ms Clock startup time after the de-assertion of SuspendM Peripheral TSTART_DEV -- 5.6 ms Host TSTART_HOST -- - PHY preparation time after the first transition of the input clock TPREP -- - µs |
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