PJRC Teensy 4.1 Development Board - Adafruit Industries
https://www.adafruit.com/product/4622
WebDescription. The Teensy 4.1, like the 4.0 , also features an ARM Cortex-M7 processor at 600 MHz, with an NXP iMXRT1062 chip, the fastest microcontroller available today - ten times faster than the Teensy 3.2 ! The NXP iMXRT1062 is a 'cross-over' processor, which has the functionality of a microcontroller, at the speeds of a microcomputer.
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