Teensy 4.1 Development Board

Teensy 4.1 Development Board (ARM Cortex-M7, 600 MHz)

The Teensy 4.1 is the newest iteration of the extremely popular Teensy development platform. It features an ARM Cortex-M7 processor running at 600 MHz with the NXP iMXRT1062 chip, offering four times larger flash memory than Teensy 4.0 and two additional locations to optionally add more memory.

Teensy 4.1 has the same size and shape as the Teensy 3.6 (2.4 in × 0.7 in) and provides enhanced I/O capability, including an Ethernet PHY, microSD card socket, and USB host port.

When running at 600 MHz, Teensy 4.1 consumes approximately 100 mA of current and supports dynamic clock scaling. Unlike traditional microcontrollers, changing the CPU speed does not affect serial baud rates, audio streaming sample rates, or Arduino timing functions such as delay() and millis(). Teensyduino extensions like IntervalTimer and elapsedMillis also continue to work correctly while the CPU speed changes.

Teensy 4.1 includes a power shut-off feature. By connecting a pushbutton to the On/Off pin, the 3.3 V power supply can be completely disabled by holding the button for five seconds and turned back on with a brief press. If a coin cell is connected to VBAT, the onboard RTC continues tracking date and time even when the board is powered off.

The Cortex-M7 processor includes a hardware floating-point unit (FPU) supporting both 64-bit double and 32-bit float, allowing fast execution of math functions such as log(), sin(), and cos(). Teensy 4.1 can also be overclocked well beyond 600 MHz.

The ARM Cortex-M7 brings powerful CPU features to a true real-time microcontroller platform, delivering performance many times faster than typical 32-bit microcontrollers.

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