NXP Semiconductors LPCXpresso54S018M, Руководство пользователя, Страница: 7 / 34

NXP Semiconductors
UM11192
User Manual for LPCXpresso54S018M Development Board
UM11192 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2019. All rights reserved.
User manual Rev. 1.0
— 13th February 2019
7 of 34
Circuit ref Description Section
JP4 This set of 3 jumpers control various selections for power
measurement:
Position 1-2 and 3-4 are in parallel with 1 ohm resistors. Current
can be measured across these jumper headers to determine
current flow into the LPC54S018J4M target.
Position 5-6 (installed by default) can be left open and a current
meter connected between these pins to directly measure current
flow into the LPC54S018J4M target.
6
JP5 Link2 (LPC43xx) force DFU boot
– 2 position jumper pins.
1) Jumper open (default) for Link2 to follow the normal boot
sequence. The Link2 will boot from internal flash if image is found
there. With the internal flash erased the Link2 normal boot
sequence will fall through to DFU boot.
Jumper shunted to force the Link2 to DFU boot mode. Use this
setting to reprogram the Link2 internal flash with a new image
(using the LPCScrypt utility) or to use the MCUXpresso IDE with
CMSIS-DAP protocol.
Note that the LPCXpresso54S018M Link2 flash is pre-programmed
with a version of CMSIS-DAP firmware by default.
4
JP6
When open (default), the “Bridge” UART and SPI connections from
the Link2 probe are driven to the LPC54S018J4M target.
Install JP6 when using the SPI interface at connector J14 and/or
FC0 UART at P4 (FTDI). Note that this disables the Link2 SPI and
UART (bridge) probe connections.
8.3
JP7
(not
installed by
default) JP7 may be fitted to provide a convenient way to enable/disable
the reset signal to/from the expansion connectors. Solder jumper
JS28 should be removed if JP7 is to be used. See
schematic
JP9 USB host Vbus selection
Note that only one of USB0 or USB1 can be configured as a USB
host port at any given time (this is a board restriction, not a
limitation of the LPC54S018J4M.)
Install jumper in position 1-2 for USB1 (High Speed) to provide
Vbus (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)
8.2
JP10 USB host power control selection
This jumper selects routing of USB port power and overcurrent
detect from either the USB0 or USB1 ports of the
LPC546x8/540xx. Note that only one of USB0 or USB1 can be
configured as a USB host port at any given time (this is a board
restriction, 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. enable
USB host capability)
8.2