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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 19 of 24
NXP Semiconductors
UM11158
LPCXpresso55S69/55S28 Development Boards
8.3 Arduino and LPCXpresso V3 expansion connectors
The connectors P16-P19 provide Arduino UNO R3 compatibility and access to several
other signals for use in prototyping. The overall footprint is compatible with the
LPCXpresso V3 expansion connector footprint used on other LPCXpresso boards of this
type. Note that some ports used on these connectors are shared with other
devices/connectors on the board, including the Mikroe Click site, audio codec and RGB
LED. Refer to the schematic for further information.
When using an Arduino shield with the Board, align P17 of the Arduino shield (SCL) with
pin 1 of connector P17 on the LPCXpresso55S69 board.
Table 4. Micro SD card connections
SDIO interface signals Port Notes
SDIO Clock P0_7 IOCON function 2
SDIO Command P0_8 IOCON function 2
D0 P0_9 IOCON function 2
D1 P0_17 IOCON function 2
D2 P0_24 IOCON function 2
D3 P0_25 IOCON function 2
Card detect P0_21 IOCON function 2
Power enable P1_0 GPIO. Active low.
Table 5. Micro SD card connections
Expansion connector Port
P17 The odd number pins are compatible with Arduino Uno rev3 Digital
15:8, AREF, SDA & SCL connector. The even numbered pins are
used for external access and expansion of LPC55Sxx signals not
used by the Arduino Uno rev3 compatible interface.
P18 The odd numbered pins 1 – 15 are compatible with Arduino Uno rev3
Digital 7:0 connector. The even numbered pins, and odd numbered
pins 17 and 19, are used for external access and expansion of
LPC55Sxx signals not used by the Arduino Uno rev3 compatible
interface.
P16 The even numbered pins 6 – 20 are compatible with the Arduino Uno
rev3 Power connector standard.
P19 The even numbered pins 2 – 12 are compatible with Arduino Uno
rev3 Analog connector. The odd numbered pins are used for external
access and expansion of LPC55Sxx signals not used by the Arduino
Uno rev3 compatible interface.