![NXP Semiconductors LPC43Sxx Скачать руководство пользователя страница 768](http://html1.mh-extra.com/html/nxp-semiconductors/lpc43sxx/lpc43sxx_user-manual_1721827768.webp)
UM10503
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
768 of 1441
NXP Semiconductors
UM10503
Chapter 26: LPC43xx/LPC43Sxx USB1 Host/Device controller
raw pin status register hence LOW level detection should be configured for this pin to
detect when to turn the PLL off. Similarly, to detect resume signaling to leave low power
state, software should configure this pin to detect a HIGH level in the event router.
The core will enter the low power state if:
•
Software sets the PORTSC1.PHCD bit.
When operating in host mode, the core will leave the low power state on one of the
following conditions:
•
software clears the PORTSC1.PHCD bit
•
a device is connected and the PORTSC1.WKCN bit is set
•
a device is disconnected an the PORTSC1.WKDC bit is set
•
an over-current condition occurs and the PORTSC1.WKOC bit is set
•
a remote wake-up from the attached device occurs (when USB bus was in suspend)
•
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).
When operating in device mode, the core will leave the low power state on one of the
following conditions:
•
software clears the PORTSC1.PHCD bit.
•
a change on the USB data lines (dp/dm) occurs.
•
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.