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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F042F4 датащи(PDF) 89 Page - STMicroelectronics |
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STM32F042F4 датащи(HTML) 89 Page - STMicroelectronics |
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89 / 117 page  DocID025832 Rev 5 89/117 STM32F042x4 STM32F042x6 Electrical characteristics 89 USB characteristics The STM32F042x4/x6 USB interface is fully compliant with the USB specification version 2.0 and is USB-IF certified (for Full-speed device operation). CAN (controller area network) interface Refer to Section 6.3.14: I/O port characteristics for more details on the input/output alternate function characteristics (CAN_TX and CAN_RX). Table 65. USB electrical characteristics Symbol Parameter Conditions Min. Typ Max. Unit VDDIO2 USB transceiver operating voltage -3.0(1) 1. The STM32F042x4/x6 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 voltage range. -3.6 V tSTARTUP(2) 2. Guaranteed by design, not tested in production. USB transceiver startup time - - - 1.0 µs RPUI Embedded USB_DP pull-up value during idle - 1.1 1.26 1.5 kΩ RPUR Embedded USB_DP pull-up value during reception - 2.0 2.26 2.6 ZDRV(2) Output driver impedance(3) 3. No external termination series resistors are required on USB_DP (D+) and USB_DM (D-); the matching impedance is already included in the embedded driver. Driving high and low 28 40 44 Ω |
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