Teensy 4.1, Lockable

Teensy 4.1 Lockable with Copy Protection The Teensy 4.1 Lockable with Copy Protection is a high-speed microcontroller board for advanced embedded projects, secure products, robotics, data logging, audio, controls, and connected devices. It runs on a 600MHz ARM Cortex-M7 processor and includes large memory, many I/O pins, Ethernet support, USB host support, and a built-in microSD card socket. This lockable version is made for developers who want to protect finished firmware in production. When properly set up, the board can be locked into secure mode so only encrypted code made with your private key can run. Why Choose Teensy 4.1 Lockable? Fast 600MHz ARM Cortex-M7 processor for demanding projects. Lockable version for production code security. 8MB flash and 1024K RAM for larger programs and buffers. Built-in microSD socket for data logging and file storage. 10/100 Ethernet PHY for wired network projects. USB host support for selected USB devices. 55 total I/O pins with 35 PWM-capable pins. Good for robotics, audio, logging, control, and secure products. What You Can Build Secure embedded product prototype High-speed robotics controller Ethernet-connected sensor system MicroSD data logger Audio processing project USB host device project LED and pixel controller CAN bus test project Motor and motion control system Advanced Arduino IDE-compatible project What’s Included? Teensy 4.1 Lockable with Copy Protection board - 1 pc Note: Headers are not included. USB cable, Ethernet cable, microSD card, sensors, and other accessories are sold separately unless stated in the package. Technical Specifications Product Type High-performance lockable microcontroller development board Model Teensy 4.1 Lockable with Copy Protection SKU DEV-28369 Processor ARM Cortex-M7 at 600MHz Main Chip NXP MIMXRT1062DVJ6B Flash Memory 8MB flash RAM 1024K RAM, with 512K tightly coupled memory Total I/O Pins 55 total I/O pins Breadboard-Friendly I/O 42 pins PWM Pins 35 PWM pins Analog Inputs 18 analog input pins Communication 8 serial ports, 3 SPI ports, 3 I2C ports, and 3 CAN bus ports Audio Support 2 I2S digital audio ports and 1 S/PDIF digital audio port Storage Built-in microSD card socket USB USB device and USB host support Ethernet 10/100 Mbit Ethernet PHY Security Feature Lockable copy protection with programmable security fuse Software Support Arduino IDE with Teensy boards add-on Logic Level 3.3V logic. Pins are not 5V tolerant. Best For Secure products, robotics, audio, data logging, Ethernet projects, controls, and high-speed embedded systems Copy Protection Notes This lockable board is best for final products where firmware protection is needed. It allows secure mode to be enabled using a private encryption key. Locking the board is a serious step. Wrong fuse settings can permanently damage the board. Losing your key can also prevent future programming. For early testing and normal prototyping, use a standard Teensy board first. Power and Wiring Notes Teensy 4.1 uses 3.3V logic. Do not connect 5V signals directly to its pins. Using 5V input signals may damage the board. The board can be powered through USB for basic testing. When using external power through VIN, follow Teensy power guidelines carefully. Important Notes This is the lockable copy protection version. Headers are not included. Use 3.3V-safe sensors and modules. Use a compatible USB cable for programming. Install Teensy support in Arduino IDE before uploading code. Use the standard Teensy board first for early prototyping. Recommended Add-ons Teensy boards and accessories Pins and headers Sensors and modules MicroSD cards and storage USB cables FAQ What is Teensy 4.1 Lockable used for? It is used for high-speed embedded projects and final products that need firmware copy protection. Is this good for beginners? This board is best for advanced users. For basic learning, a standard Teensy or Arduino-compatible board is easier to start with. Does this version have Ethernet? Yes. This version includes a 10/100 Mbit Ethernet PHY. Are headers included? No. Headers are not included. Are the pins 5V tolerant? No. The pins use 3.3V logic and are not 5V tolerant.