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STM32F103XC Datasheet(PDF) 105 Page - STMicroelectronics |
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STM32F103XC Datasheet(HTML) 105 Page - STMicroelectronics |
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105 / 143 page  DS5792 Rev 13 105/143 STM32F103xC, STM32F103xD, STM32F103xE Electrical characteristics 135 Figure 56. USB timings: definition of data signal rise and fall time Table 57. 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) 3. The STM32F103xC/D/E USB functionality is ensured down to 2.7 V but not the full USB electrical characteristics which are degraded in the 2.7-to-3.0 V VDD voltage range. 3.6 V VDI(4) 4. Guaranteed by characterization results. Differential input sensitivity I(USB_DP, USB_DM) 0.2 - V VCM(4) Differential common mode range Includes VDI range 0.8 2.5 VSE(4) Single ended receiver threshold - 1.3 2.0 Output levels VOL 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 Static output level high RL of 15 kΩ to VSS(5) 2.8 3.6 Table 58. 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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