Datasheet

NXP Semiconductors
UM11035
LPCXpresso boards for LPC546xx/LPC540xx/LPC54S0xx families of
MCUs
UM11035
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User manual
Rev. 2.1 — 7th January 2019
23 of 36
this mode press and hold down the ISP1 button while pressing and releasing the reset
button (or power cycling the board). See Section 3.1 for further information on how to use
this mode.
7.2.1.2 Device mode
The FS port supports USB device mode operation; no jumper settings are needed to
configure this mode. When using the port in device mode, a standard micro USB cable
can be used.
7.2.1.3 Host mode
The FS port supports USB device mode operation but, due to sharing of some signals
and power supply circuitry, requires the following settings:
• Connect external +5V power via USB connector J1. This is required for the FS USB
port to be able to power the devices connected to it.
• Install JP10
• For each of JP9, JP11, JP12, JP13 install a jumper in position 2-3.
• Use of a micro AB adaptor to connect an external USB device may be required, as
most USB device have either a type A or micro B connector.
Note: The Ethernet and HS USB Host functions are disabled when the board is
configured for FS USB Host operation. Also, note that Expansion connector port PIO4-7
is no longer available when using this mode.
7.2.2 USB High Speed port (USB1)
The LPC546x8/540xx/54S0xx High Speed (HS) USB port is connected to micro AB USB
connector J2. This section describes functionality support by this board and associated
jumper settings for this board.
7.2.2.1 Mass Storage Boot (MSC) (LPCXpresso546x8 boards only)
The HS USB port supports mass storage boot mode (also known as MSC). When the
board is booted in this mode using the HS port, the device will enumerate in a host
computer (when that computer is connected using a standard micro B USB cable via J2)
as a mass storage class device called CRP_DISABLED. To force the board to boot into
this mode press and hold down the ISP2 button while pressing and releasing the reset
button (or power cycling the board). See Section 3.1 for further information on how to use
this mode.
7.2.2.2 Host mode
The HS port supports USB device mode operation but, due to sharing of some signals
and power supply circuitry with the FS port, requires the following settings:
• Connect external +5V power via USB connector J1. This is required for the HS USB
port to be able to power the devices connected to it.
• Ensure JP10 is not installed (default).
• Install a jumper at JP9 in position 1-2 (default).
• Use of a micro AB adaptor to connect an external USB device may be required, as
most USB device have either a type A or micro B connector.