Datasheet

NXP Semiconductors

UM10973

LPCXpresso54114

UM10973

All information provided in this document is subject to legal disclaimers.

User manual

Rev. 1.1 — 25 February 2016

15 of 21

7. LED indicators

The LPCXpresso54114 board LED locations are shown in Fig 2. A description of each

on-board LED indicator is shown in Table 3.

Table 3. LED indicator functions

LED reference

Description

Link2 MCU BOOT0_LED indicator. Reflects the state of Link2 MCU P1_1.

When the boot process fails, D1 will toggle at a 1 Hz rate for 60 seconds.

After 60 seconds, the Link2 MCU is reset. It will be ON when the Link2

MCU is Booting using DFU (See description for JP6).

Tri-color LED – Driven by Target LPC54114 MCU. The red led is driven by

P0_29. The green led is driven by P0_30. The blue led is driven by

P0_31. LEDs are on when the LPC54114 port is output low. To light any

of the tri-color leds, JP6 must have a shunt between pins 1 – 2. By default

the 0Ω resistor at JS17 provides the shunt for JP6. To measure the lowest

possible current from LPC54114 remove the 0Ω resistor at JS17 (remove

+3.3V from led common anode).

Target LPC54114 power LED. This LED is on any time power is applied to

the Target LPC54114 MCU. LED will have a brighter intensity when the

LPC54114 is powered from +3.3V than when powered by +1.8V.

Target Reset LED. This LED is on anytime the Target RESETn is pulled

low.

8. Expansion connectors

The LPCXpresso54114 board includes four expansion connectors plus a PMod™

compatible connector (J3). The expansion connectors (J1, J2, J8 and J9) incorporate an

Arduino Uno revision 3 footprint in their inner rows. Not all connector locations are

populated on the expansion connectors since the LPC54114 does not have enough I/O

to utilize all of the available connections (additional pin locations are provided for

compatibility with future LPCXpresso boards).