Product description
Meet the Teensy 4.1 without Ethernet - a streamlined version of the popular high-performance development platform. It takes the record-breaking speed of the Teensy 4.0 and expands it for large-scale projects that don’t require wired networking. Featuring a similar NXP processor, this board is built around an ARM Cortex-M7 running at 600 MHz. Its processing power is supported by 8 MB of Flash memory (four times larger than the 4.0) and 1 MB (1024 K) of RAM.
This version omits the Ethernet PHY controller typically found on the standard Teensy 4.1, providing a lower-cost option for applications where Ethernet is unnecessary. It adopts the larger Teensy 3.6 form factor (2.4 in × 0.7 in) and retains all other powerful I/O capabilities, including a built-in microSD card socket and a USB host port.
The Power of the Cortex-M7 Core
At the heart of the Teensy 4.1 is the NXP MIMXRT1062DVJ6B, a “Crossover MCU” designed to bridge the gap between low-cost microcontrollers and high-performance application processors. While it features the same powerful 600 MHz ARM Cortex-M7 core as the Teensy 4.0, this version uses a larger 196-pin package. The expanded pinout is key to the Teensy 4.1’s extensive feature set, allowing it to expose additional I/O, the SDIO interface, and the USB Host port unavailable on the smaller package.
Dual-Issue Superscalar Processor: The M7 isn’t just fast - it’s efficient. It can execute two instructions per clock cycle at 600 MHz. Benchmarks show that C++ code compiled by Arduino achieves dual-instruction execution 40–50 % of the time, dramatically accelerating numerically intensive tasks.
Branch Prediction: This is the first ARM microcontroller to implement branch prediction. While other cores (like the M4) waste three clock cycles in loops, the M7’s branch predictor learns the loop pattern and removes that overhead, executing branch instructions in a single cycle.
Hardware FPU: The built-in Floating Point Unit (FPU) accelerates math operations. Unlike many microcontrollers that only handle 32-bit floats, the Teensy 4.1 FPU provides full hardware acceleration for both 64-bit “double” and 32-bit “float” types. Complex functions such as log(), sin(), and cos() execute at full hardware speed, not through slow software emulation.
Advanced & Expandable Memory Architecture
To keep the 600 MHz CPU fed with data, the Teensy 4.1 utilizes Tightly Coupled Memory (TCM). This feature allows the Cortex-M7 to use 512 K of its 1024 K RAM as ultra-fast, single-cycle access memory via dual 64/32-bit high-speed buses (one for instructions and one for data).
The Teensyduino environment automatically places your sketch code in this high-speed memory. Because this access path is separate from the main AXI bus, DMA-based peripherals can reach other memory efficiently, minimizing I/O bottlenecks.
In addition to the generous onboard memory, the Teensy 4.1 includes two solder pads on the bottom for optional external memory - allowing up to 16 MB of PSRAM or a QSPI flash chip for even larger applications.
Smart Power Management & Flexibility
The Teensy 4.1 is a powerful yet efficient microcontroller, drawing approximately 100 mA at 600 MHz.
Dynamic Clock Scaling: You’re not limited to a single speed. The Teensy 4.1 fully supports dynamic clock scaling. Unlike traditional microcontrollers, changing the CPU speed on the fly will not disrupt serial baud rates, audio sample rates, or Arduino timing functions such as delay() and millis().
Power On/Off: For low-power or battery-operated designs, a dedicated On/Off pin allows you to completely disable the 3.3 V 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 battery is connected to the VBAT pin, the Teensy 4.1’s Real-Time Clock (RTC) continues to track date and time even when main power is off.
Overclocking: For performance enthusiasts, the Teensy 4.1 can be overclocked well beyond 600 MHz.
Combining the processing power of the Cortex-M7 with expanded memory and essential peripherals such as a built-in SD slot and USB host port, the Teensy 4.1 without Ethernet is an ideal solution for high-performance embedded projects that don’t require network connectivity.
Specifications:
- ARM Cortex-M7 @ 600 MHz
- 1024 K RAM (512 K tightly coupled)
- 8 MB Flash (64 K reserved for recovery & EEPROM emulation)
- USB Host Port
- 2 Chips Plus Program Memory
- 55 Total I/O Pins
- 3 CAN Buses (1 with CAN FD)
- 2 I2S Digital Audio Interfaces
- 1 S/PDIF Digital Audio Interface
- 1 SDIO (4-bit) native SD
- 3 SPI Interfaces (all with 16-word FIFO)
- 7 Bottom SMT Pad Signals
- 8 Serial Ports
- 32 General-Purpose DMA Channels
- 35 PWM Pins
- 42 Breadboard-Friendly I/O Pins
- 18 Analog Inputs
- Cryptographic Acceleration
- Random Number Generator
- RTC for Date/Time
- Programmable FlexIO
- Pixel Processing Pipeline
- Peripheral Cross-Triggering
- microSD Card Socket
- Power On/Off Management
- Does not include: Headers
