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LPC55S2X Datasheet(PDF) 114 Page - NXP Semiconductors |
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LPC55S2X Datasheet(HTML) 114 Page - NXP Semiconductors |
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114 / 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 114 of 139 NXP Semiconductors LPC55S2x/LPC552x 32-bit ARM Cortex-M33 microcontroller • Connect the VBUS signal directly from the connector to the USB_VBUS pin. In this case, 5 V are applied to the USB_VBUS pin while the regulator is ramping up to supply VDD. Since the USB_VBUS pin is only 5 V tolerant when VDD is at operating level, this connection can degrade the performance of the part over its lifetime. Simulation shows that lifetime is reduced to 15 years at Tamb = 45 °C and 8 years at Tamb = 55 °C assuming that USB_VBUS = 5 V is applied continuously while VDD = 0 V. 13.6 USB1 High-speed VBUS threshold levels The USB1 has the following characteristics for VBUS (see Table 45). The USB1_VBUS can tolerate an input voltage of 5.5 V. Table 45. USB1 High-speed VBUS threshold levels Function Min Typ Max Unit Votg_sess_valid 0.8 - 4.0 V VBUS_valid 4.192 - 5.5 V Vadp_probe 0.6 - 0.8 V Vadp_sense 0.20 - 0.55 V |
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