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UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
585 of 1269
NXP Semiconductors
UM10503
Chapter 23: LPC43xx USB0 Host/Device/OTG controller
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a change on vbusvalid occurs (= VBUS threshold at 4.4 V is crossed).
•
a change on bvalid occurs (= VBUS threshold at 4.0 V is crossed).
The vbusvalid and bvalid signals coming from the transceiver are not filtered in the
SUSP_CTRL module. Any change on those signals will cause a wake-up event. Hence
for USB0, it is recommended that the OTG_DISCHARGE resistor be enabled, by setting
OTGSC.VD bit, before entering low power mode.