UM11158 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2022. All rights reserved.
User manual Rev. 1.6 — 17 March 2022 2 of 24
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NXP Semiconductors
UM11158
LPCXpresso55S69/55S28 Development Boards
Revision history
Rev Date Description
1.6 20220317
• In Section 10 “Errata” added title Section 10.1 “Brown-out detect (BOD) may be
triggered during boot (code execution from ROM)”.
• Added Section 10.2 “SPI ISP mode” and Section 10.3 “Power supply rise time”.
1.5 20200505 Added information about crystals. Updated information about 1.8V operation. Added
clarifications about labeling of external serial connector. Renamed section 10 to Errata,
added information about regulator errata (Revision A2 boards.)
1.4 20191114 Added information about tool version requirements.
1.3 20191029 Manual now also covers LPCXpresso55S28. Updated P4 information (after Revision A1
boards, 1.8V option may be used). Corrected pin out diagrams for alternative I2C
connection on P19.
1.2 20190425 Added note about SD1_POWER_EN control in expansion connectors section. Corrected
Red/Blue port pin assignments. Updated Figures 1 & 2.
1.1 20190314 Additional information about expansion connectors and use of J-link. Updated board
images.
1.0 20190308 Added references in jumper/connector Indicators/buttons/connector table. Added notes
about 3.3V only operation of Revision A/A1 boards. Added new figures for expansion
connectors.
0.2 20181015 Added official document number. Section 4 updated/corrected.
0.1 20180816 Initial internal release
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