NXP Semiconductors UM11035LPCXpresso boards for LPC546xx/LPC540xx/LPC54S0xx families ofMCUsUM11035 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2017-2019. All rights reserved.User manual Rev. 2.1 — 7th January 2019 9 of 36Circuit ref Description SectionJP7(notinstalled bydefault)JP7 may be fitted to provide a convenient way to enable/disablethe reset signal to/from the expansion connectors. Solder jumperJS28 should be removed if JP7 is to be used.SeeschematicJP8 This set of jumpers is used to configure 3.3V vs 1.8V boardconfigurations. OM13092 boards are all 3.3V, so these jumpersshould not be changed from the default.JP8 is not present on Revision C boards (functionality has beenreplaced by zero ohm links).SeeschematicJP9 USB host Vbus selectionNote that only one of USB0 or USB1 can be configured as a USBhost port at any given time (this is a board restriction, not alimitation of the LPC546x8/540xx.)Install jumper in position 1-2 for USB1 (High Speed) to provideVbus (i.e. enable USB host capability) (Default)Install jumper in position 2-3 for USB0 (Full Speed) to provide Vbus(i.e. enable USB host capability)7.2JP10 USB host power control selectionThis jumper selects routing of USB port power and overcurrentdetect from either the USB0 or USB1 ports of theLPC546x8/540xx. Note that only one of USB0 or USB1 can beconfigured as a USB host port at any given time (this is a boardrestriction, not a limitation of the LPC546x8/540xx.)Leave open when using USB1 (High Speed) as a USB host(Default)Install jumper for USB0 (Full Speed) to provide Vbus (i.e. enableUSB host capability)7.2JP11 &JP12USB0 host / Ethernet TXD/RXD selectionDue to sharing of pin functionality on this development board, it isnot possible to support the Ethernet port and USB0 overcurrentfeature simultaneously. For both JP11 and JP12:Install jumper in position 1-2 to enable Ethernet (Default)Install jumper in position 2-3 for USB0 (Full Speed) (i.e. enableUSB host capability)7.2JP13 USB0 host / Ethernet selectionDue to sharing of pin functionality on this development board, theP4-7 port pin is used for either the USB0 port or as a generalpurpose signal on the expansion connector.Install jumper in position 1-2 to route P4-7 to the expansionconnector.Install jumper in position 2-3 for USB0 (Full Speed) (i.e. enableUSB host capability)7.2, 7.6Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.