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STM32L151VD 数据表(PDF) 110 Page - STMicroelectronics |
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STM32L151VD 数据表(HTML) 110 Page - STMicroelectronics |
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110 / 140 page  Electrical characteristics STM32L151xD STM32L152xD 110/140 Doc ID 022027 Rev 6 USB characteristics The USB interface is USB-IF certified (full speed). Figure 34. USB timings: definition of data signal rise and fall time Table 60. USB startup time Symbol Parameter Max Unit tSTARTUP (1) 1. Guaranteed by design, not tested in production. USB transceiver startup time 1 µs Table 61. 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 3.0 3.6 V VDI (2) 2. Guaranteed by characterization, not tested in production. Differential input sensitivity I(USB_DP, USB_DM) 0.2 - V VCM (2) Differential common mode range Includes VDI range 0.8 2.5 VSE (2) Single ended receiver threshold 1.3 2.0 Output levels VOL (3) 3. Tested in production. Static output level low RL of 1.5 kΩ to 3.6 V (4) 4. RL is the load connected on the USB drivers. -0.3 V VOH (3) Static output level high RL of 15 kΩ to VSS (4) 2.8 3.6 Table 62. USB: full speed electrical characteristics Driver characteristics(1) Symbol Parameter Conditions Min Max Unit tr Rise time(2) 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 ai14137 tf Differen tial Data L ines VSS VCRS tr Crossover points |
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