LPCXpresso860MAX
Overview
The LPC86x are an Arm Cortex-M0+ based, low-cost 32-bit MCU family operating at CPU frequencies of up to 48 MHz. The LPC86x support up to 64 KB of flash memory and 8 KB of SRAM.
The peripheral complement of the LPC86x includes a CRC engine, one I2C-bus interface, one I3C-MIPI bus interface, up to three USARTs, up to two SPI interfaces, one multi-rate timer, self-wake-up timer, two FlexTimers, a DMA, one 12-bit ADC, one analog comparator, function-configurable I/O ports through a switch matrix, an input pattern match engine, and up to 54 general-purpose I/O pins.

MCU device and part on board is shown below:
Device: LPC865
PartNumber: LPC865M201JBD64
Getting Started with MCUXpresso SDK Package
Getting Started with MCUXpresso SDK GitHub
Release Notes
ChangeLog
Driver API Reference Manual
This section provides a link to the Driver API RM, detailing available drivers and their usage to help you integrate hardware efficiently.
Middleware Documentation
Find links to detailed middleware documentation for key components. While not all onboard middleware is covered, this serves as a useful reference for configuration and development.