NXP Semiconductors UM11057 LPCXpresso845MAX User Manual
UM11057
LPCXpresso845MAX
Rev. 1.0 — 9 June 2017 User Manual
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Keywords LPCXpresso845MAX, OM13097, LPC845, LPC844
Abstract LPCXpresso845MAX User Manual
UM11057 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2017. All rights reserved.
User Manual Rev. 1.0 — 9 June 2017 2 of 14
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For sales office addresses, please send an email to: salesaddresses@nxp.com
NXP Semiconductors
UM11057
User Manual
Revision history
Rev Date Description
1.0 20170526 First draft
UM11057 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2017. All rights reserved.
User Manual Rev. 1.0 — 9 June 2017 3 of 14
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1. Introduction
The LPCXpresso-MAX family of boards provides a powerful and flexible development
system for NXP's low end Cortex-M0+ MCUs. They can be used with a range of
development tools, including the MCUXpresso IDE toolchain. The LPCXpresso845MAX
board is developed by NXP to enable evaluation of and prototyping with the LPC84x
family of MCUs. Figure 1 shows the LPCXpresso845MAX Board.
The LPCXpresso845MAX board includes the following features:
• Compatible with MCUXpresso IDE and other popular toolchains (incl. IAR and Keil).
• On-board CMSIS-DAP (debug probe) with VCOM port, based on LPC11U35 MCU.
• Debug connector to allow debug of target MCU using an external probe.
• Red, Green and Blue User LEDs.
• Target ISP and User/Wake buttons.
• Target Reset button.
• LPCXpresso expansion connector.
• DAC output via speaker driver and speaker.
• Arduino connectors compatible with the “Arduino UNO” platform.
• Pmod® compatible expansion header.
• Prototyping area.
Fig 1. LPCXpresso845MAXBoard
UM11057 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2017. All rights reserved.
User Manual Rev. 1.0 — 9 June 2017 4 of 14
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UM11057
User Manual
2. Board Layout
Figure 2 below shows the layout of the LPCXpresso845MAX board, indicating location of
jumpers, buttons, connectors/expansion options and MCU devices.
Table 1 shows the layout of the LPCXpresso845MAX board, indicating location of
jumpers, buttons, connectors/expansion options and MCU devices.
Fig 2. Board layout (top silkscreen)
Table 1. Jumpers and connectors
Circuit reference Description Reference section
JP1 Inserting a jumper on JP1 holds the LPC11U35 debug probe in reset.
Install JP1 when using an external debug probe.
Section 4.1
JP2 Ammeter connection. After removal of SJ6, an ammeter can be installed
between the pins of JP2 to measure current flow to the LPC845. Once
SJ6 has been removed, JP2 must either be installed or an ammeter in
place in order for the LPC845 to be powered.
Section 6
JP3 LPC11U35 Device Firmware Update (DFU) mode enable. Install JP3
before powering up the board via USB in order to place the LPC11U35 in
DFU mode (thus enabling software update via drag and drop
programming on a host computer.)
Section 3.1
P1 Power measurement point. Connect a voltmeter across P1 to measure
voltage drop across a 2.43 ohm resistor connected in-line with the supply
to the LPC845 device.
Section 6
P2 VREFP/VREFN header connection. By default, VREFP of the LPC845 is
connected to the 3.3V regulator output, and VREFN to ground. By
removing connection 1-2 on SJ9 and bridging pads 2-3 instead, VREFP
can be injected via pin 1 of header P2. By removing connection 1-2 on
SJ8 and bridging pads 2-3 instead, VREFN can be injected via pin 3 of
header P2.
n/a
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User Manual Rev. 1.0 — 9 June 2017 5 of 14
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P3 LPCXpresso expansion connector. Section 5.3
P4 External SWD debug connector for LPC845. Section 4.1
P5 External SWD debug connector for LPC11U35 (not installed, would be
mounted on underside of PCB.)
Section 4
P6 Once SJ18 has been removed, P6 can be used to connect/disconnect the
LPC845 UART TX from the LPC11U35 debug probe (VCOMM
connection).
Section 5.3
P7 Once SJ17 has been removed, P7 can be used to connect/disconnect the
LPC845 UART RX from the LPC11U35 debug probe (VCOMM
connection).
Section 5.3
J1, J2, J5, J6 Arduino expansion connectors. Section 5.1
J3 PMod-compatible header. Section 5.2
J4 USB connector for debug probe / board power. Section 4
Table 1. Jumpers and connectors
Circuit reference Description Reference section
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