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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32L151x8 датащи(PDF) 92 Page - STMicroelectronics |
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STM32L151x8 датащи(HTML) 92 Page - STMicroelectronics |
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92 / 133 page  Electrical characteristics STM32L151x6/8/B STM32L152x6/8/B 92/133 DocID17659 Rev 12 Figure 25. USB timings: definition of data signal rise and fall time Table 51. USB DC electrical characteristics Symbol Parameter Conditions Min.(1) 1. All the voltages are measured from the local ground potential. Max.(1) Unit Input levels VDD USB operating voltage(2) 2. To be compliant with the USB 2.0 full speed electrical specification, the USB_DP (D+) pin should be pulled up with a 1.5 k Ω resistor to a 3.0-to-3.6 V voltage range. -3.0 3.6 V VDI(3) 3. Guaranteed by characterization results. Differential input sensitivity I(USB_DP, USB_DM) 0.2 - V VCM(3) Differential common mode range Includes VDI range 0.8 2.5 VSE(3) Single ended receiver threshold - 1.3 2.0 Output levels VOL(4) 4. Tested in production. Static output level low RL of 1.5 kΩ to 3.6 V(5) 5. RL is the load connected on the USB drivers. -0.3 V VOH(4) Static output level high RL of 15 kΩ to VSS(5) 2.8 3.6 Table 52. USB: full speed electrical characteristics Driver characteristics(1) 1. Guaranteed by design. Symbol Parameter Conditions Min Max Unit tr Rise time(2) 2. Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB Specification - Chapter 7 (version 2.0). CL = 50 pF 420 ns tf Fall Time(2) CL = 50 pF 4 20 ns trfm Rise/ fall time matching tr/tf 90 110 % VCRS Output signal crossover voltage 1.3 2.0 V |
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