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LPC55S2X Datasheet(PDF) 113 Page - NXP Semiconductors |
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LPC55S2X Datasheet(HTML) 113 Page - NXP Semiconductors |
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113 / 140 page ![]() LPC55S2x/LPC552x All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2022. All rights reserved. Product data sheet Rev. 2.2 — 8 December 2022 113 of 139 NXP Semiconductors LPC55S2x/LPC552x 32-bit ARM Cortex-M33 microcontroller The internal pull-up (1.5 kW) can be enabled by setting the DCON bit in the DEVCMDSTAT register to prevent the USB from timing out when there is a significant delay between power-up and handling USB traffic. External circuitry is not required. Two options exist for connecting VBUS to the USB_VBUS pin: • Connect the regulator output to USB_VBUS. In this case, the USB_VBUS signal is HIGH whenever the part is powered. Fig 29. USB interface on a self-powered device where USB_VBUS = 5 V Fig 30. USB interface on a bus-powered device LPCxxxx VDD R1 1.5 kΩ aaa-023996 USB-B connector USB_DP USB_DM USB_VBUS VSS RS = 33 Ω RS = 33 Ω USB R2 R3 D+ D- REGULATOR VBUS LPCxxxx VDD R1 1.5 kΩ aaa-023997 USB-B connector USB_DP USB_DM VSS USB_VBUS(2) USB_VBUS(1) USB D- RS = 33 Ω RS = 33 Ω D+ |
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