LPCXpresso boards for LPC546xx/LPC540xx/LPC54S0xx families of
MCUs
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2017-2019. All rights reserved.
Rev. 2.1 — 7th January 2019
Fig 6. Line input circuitry
A second 3.5 mm stereo jack socket (J6) provides a headphone / line out from the codec,
via the circuit shown in Fig 7.
Fig 7. Headphone / line output circuitry
The MCUXpresso SDK includes drivers and example code for the audio codec.
9.3 SD card
The full size SD card (J7) includes in the LPCXpresso546x8/540xx/54S0xx board
provides a 4-bit SDIO interface to support memory cards, plug-in WiFi modules, etc.
Power enable to the socket is provided via PIO2-5, with LED D7 providing a visual
indication when power is applied.
The MCUXpresso SDK includes drivers and examples of using this interface with SD
memory cards.
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