Datasheet

NXP Semiconductors

UM10973

LPCXpresso54114

UM10973

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User manual

Rev. 1.1 — 25 February 2016

9 of 21

3. Connect the LPCXpresso54114 board to the USB port of your host computer,

connecting a micro USB cable to connector J7 (“Link”). The board will a simple LED

blinky example using the tricolor LED, alternating between red and green.

4. Allow about 30 seconds for the LPCXpresso54114 devices to enumerate for the first

time. It is not necessary to check the Hardware Manager, however if this is done

there will be five devices; four under Human Interface Devices (CMSIS-DAP, LPC-

SIO, two HID Compliant Devices, and a USB Input Device) and one under Ports

(LPC-LinkII Ucom.)

5. Your board is now ready to use with your 3rd party tool. Follow the instructions for

those tools for using a CMSIS-DAP probe.

4. LPC54114 Serial ports

By default the LPC54114 UART0 is connected to the FTDI header at J5. This can be

used for ISP booting or sending debug messages out to a host computer via a suitable

cable. The LPC54114 UART0 can also be connected through a virtual communication

port (VCOM) UART bridge Link2 function to a host computer connected to the J6 USB

Link2.

The factory default CMSIS-DAP Link2 image includes UART bridge functionality (VCOM

support), and this firmware is also available with the LPCScrypt utility, available at

http://www.nxp.com/lpcutilities. When running this firmware the default source of data to

the LPC54114 RXD is the FTDI header. Once the Link2 receives any data via the VCOM

port of a host computer it will set P2_2 low to select the Link2 UART0 data to the

LPC54114. In order to reset this so the FTDI connection can be used it is necessary to

power cycle the board.

4.1 P3 FTDI header

The FTDI header P3 mates with FTDI cable TTL-232R-3V3. P3 interfaces the LPC54114

UART0 to a Host PC virtual serial port. The location of P3 is shown in Fig 3. The pin out

and a description of the signals at P3 are listed in Table 2.