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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F756VG датащи(PDF) 166 Page - STMicroelectronics |
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STM32F756VG датащи(HTML) 166 Page - STMicroelectronics |
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166 / 228 page  Electrical characteristics STM32F756xx 166/228 DocID027589 Rev 4 Figure 54. ULPI timing diagram Table 83. USB HS clock timing parameters(1) 1. Guaranteed by design. Symbol Parameter Min Typ Max Unit - fHCLK value to guarantee proper operation of USB HS interface 30 - - MHz FSTART_8BIT Frequency (first transition) 8-bit ±10% 54 60 66 MHz FSTEADY Frequency (steady state) ±500 ppm 59.97 60 60.03 MHz DSTART_8BIT Duty cycle (first transition) 8-bit ±10% 40 50 60 % DSTEADY Duty cycle (steady state) ±500 ppm 49.975 50 50.025 % tSTEADY Time to reach the steady state frequency and duty cycle after the first transition -- 1.4 ms tSTART_DEV Clock startup time after the de-assertion of SuspendM Peripheral - - 5.6 ms tSTART_HOST Host - - - tPREP PHY preparation time after the first transition of the input clock -- - µs |
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