Make sure this fits by entering your model number. 1024K RAM (512K of Tightly Coupled Memory) 2048K Flash (64K Reserved for Recovery & EEPROM Emulation) 2 USB Ports (Both 480 MBit/Sec) 3 CAN Bus (1 with CAN FD), 2 I2S Digital Audio The Teensy 4.0 is the latest Teensy, offering the fastest microcontroller and powerful peripherals in the Teensy 1.4 by 0.7 inch form factor. It features an ARM Cortex-M7 processor at 600MHz, with an NXP iMXRT1062 chip, the fastest microcontroller available today.