NXP LPC810 ARM Cortex M0+ is a 32-bit ARM MCU that could run at 30MHz and has 6 general purpose IO, 4K flash, 1K SRAM, 2 Timers, SPI, I2C and UART. The Catweazle Mini is a Trinket-type embedded development board for NXP LPC810 ARM Cortex M0+. The built in bootloader enables flash programming with a simple serial FTDI cable.
Catweazle Mini: A Trinket type embedded board for NXP LPC810 ARM Cortex M0+