Datasheet

NXP Semiconductors

UM11121

LPCXpresso51U68

UM11121

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

User manual

Rev 1.1 — 27 April 27, 2018

14 of 22

Fig 5. Current measurement circuit error

Shield board current measurement

To use the on-board current measurement circuitry, any expansion board must match the

functionality of the LPCXpresso51U68. Refer to the board schematics for more

information.

6. Debug Configurations

The LPCXpresso51U68 LQFP board has a built-in debug probe referred to as “Link2”.

The LPC51U68 target MCU can be debugged by the Link2 debugging probe, or from an

external debug probe installed at P1. On-board jumpers JP1 and JP2 must be correctly

positioned for each mode. The on-board Link2 debug probe is capable of debugging

target MCU’s with a VDDIO range of 1.6V to 3.6V. Use JP9 to set the LPC51U68 chip

VDD to the desired voltage level (+1.8V or +3.3V). Check the sections below for the

appropriate jumper settings and how to properly power the board.

% Error

LPC51U68 current (µA)