Teensy 4.1 without Ethernet (Headers)

Product Overview

Meet the Teensy 4.1 without Ethernet (Headers), a streamlined, high-performance development board that's ready to use out of the box. This version takes the record-breaking 600MHz speed and expands it for large-scale projects, with pre-soldered headers for immediate, solder-free prototyping. Featuring the same NXP iMXRT1062 processor, this board is built around an ARM Cortex-M7 CPU running at 600MHz. This power is supported by 8MB of Flash memory (four times larger than the 4.0) and 1024K (1MB) of RAM.

This version omits the Ethernet PHY controller found on the standard Teensy 4.1, offering a lower-cost, breadboard-ready option for applications where Ethernet is not needed. It adopts the larger Teensy 3.6 form factor (2.4in x 0.7in) and retains its other powerful I/O capabilities, including a built-in microSD card socket and a USB host port.

The Power of the Cortex-M7 Core

The ARM Cortex-M7 is a quantum leap for real-time microcontrollers, bringing several high-performance computing features to the platform.

• Dual-Issue Superscalar Processor: The M7 isn't just fast; it's efficient. It can execute two instructions per clock cycle at 600MHz. Benchmarks show C++ code compiled by Arduino can achieve this dual-instruction execution 40-50% of the time, dramatically accelerating numerically intensive work.
• Branch Prediction: This is the first ARM microcontroller to use branch prediction. Where other microcontrollers (like the M4) waste three clock cycles on loops, the M7's branch predictor learns the loop and removes that overhead, allowing the branch instruction to run in a single clock cycle.
• Hardware FPU: The built-in Floating Point Unit (FPU) crushes math operations. Unlike many microcontrollers that only accelerate 32-bit floats, the Teensy 4.1's FPU provides full hardware acceleration for both 64-bit "double" and 32-bit "float" types. Complex functions like log(), sin(), and cos() are executed at full hardware speed, not through slow software emulation.

Advanced & Expandable Memory Architecture

To keep the 600MHz CPU fed with data, the Teensy 4.1 utilizes Tightly Coupled Memory (TCM). This special feature allows the Cortex-M7 to use 512K of its 1024K total RAM as incredibly fast, single-cycle access memory via a pair of dual 64/32-bit high-speed buses (one for instructions, one for data).

The Teensyduino environment automatically allocates your sketch code into this blazing-fast memory. This high-speed access is separate from the main AXI bus, which allows powerful DMA-based peripherals to access other memory with excellent efficiency, minimizing I/O bottlenecks.

In addition to the ample onboard memory, the Teensy 4.1 also features two new locations on the bottom of the board to optionally solder on external memory, allowing you to add up to 16MB of PSRAM or a QSPI flash chip for even larger applications.

Smart Power Management & Flexibility

The Teensy 4.1 is powerful, yet efficient, consuming approximately 100mA when running at 600MHz.

• Dynamic Clock Scaling: You are not locked into one speed. The Teensy 4.1 provides full support for dynamic clock scaling. Unlike traditional microcontrollers, changing the CPU speed on the fly will not break your serial baud rates, audio streaming sample rates, or Arduino timing functions like delay() and millis().
• Power On/Off: For low-power or battery-operated projects, a dedicated On/Off pin allows you to completely disable the 3.3V power supply. Simply connect a pushbutton and hold it for five seconds to power down. A brief press turns it back on.
• RTC Support: If a coin cell is connected to the VBAT pin, the Teensy 4.1’s Real-Time Clock (RTC) will continue to keep track of date and time even when the main power is off.
• Overclocking: For those who push the limits, the Teensy 4.1 is also capable of being overclocked well beyond 600MHz!

With the processing speed of the Cortex-M7 combined with expanded memory and essential peripherals like a built-in SD slot and USB host port, this Teensy 4.1 is the ideal solution for high-performance projects that don't require network connectivity.