• ARM Cortex-M7 at 600 MHz
• 7936K Flash
• 1024K RAM (512K tightly coupled)
• 4K EEPROM
• Float point math unit
• 64 & 32 bits
• QSPI memory expansion

Teensy 4.1's larger form factor also bring more I/O pins, and makes the difficult-to-access bottom pads from Teensy 4.0 very easy to access, breadboard-friendly pins. The new I/O pins bring an 8th serial port, more analog inputs and PWM outputs, and access to 16 contiguous native port pins, useful for projects needing fast parallel I/O.