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LPC2921 Datasheet(PDF) 71 Page - NXP Semiconductors |
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LPC2921 Datasheet(HTML) 71 Page - NXP Semiconductors |
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71 / 83 page  LPC2921_23_25_1 © NXP B.V. 2009. All rights reserved. Preliminary data sheet Rev. 01 — 15 June 2009 71 of 83 NXP Semiconductors LPC2921/2923/2925 ARM9 microcontroller with CAN, LIN, and USB 10.2 Suggested USB interface solutions Fig 26. Core operating frequency versus core voltage for different temperatures core voltage (V) 1.65 1.95 1.85 1.75 002aae193 125 115 135 145 core frequency (MHz) 105 25 °C 45 °C 65 °C 85 °C Fig 27. LPC2921/2923/2925 USB interface on a self-powered device LPC29xx USB-B connector USB_D+ SoftConnect switch USB_D − USB_VBUS VSS(IO) VDD(IO) R1 1.5 k Ω RS = 33 Ω 002aae149 RS = 33 Ω USB_UP_LED USB_CONNECT |
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