Teensy 4.1 (both with and without the Ethernet PHY) and Teensy 4.0 in lockable versions have just been added to our offer. These variants include a hardware code-protection mechanism developed by PJRC for projects that require intellectual-property security. Unlike the standard boards, they allow permanent encryption of the program memory. This does not prevent cloning or copying the code from the board – it can still be read, but the decryption keys remain inaccessible.
Lockable Teensy boards have the same technical specifications as their regular counterparts – the same processor, pin layout, and library compatibility. The difference lies solely in the security features and bootloader mode. PJRC provides dedicated tools for generating keys and performing the locking process. For those designing commercial devices, this can be an important part of their code-protection strategy. It is worth remembering that the operation is irreversible.
Adding the lockable versions expands our Teensy lineup with an option suited to more demanding applications. We encourage you to review the specifications and documentation before choosing the appropriate variant.
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