Editing Teensy (section)

===ARM===
The Teensy 3 series (including the Teensy LC) have Freescale microcontrollers with ARM Cortex M-series CPUs.
These have so far not reached as much popularity among enthusasts because there has been a lack of compatible firmware. Some of the µC are supported by [[Kiibohd controller | Kiibohd]].

All have micro-USB port sockets and USB ports' are available as pads on the bottom.
They operate at 3.3V. A few variants are capable of 5V input, but which pins vary between models.

{|class="wikitable variants-table sortable"
! Name !! µC !! MCU !! RAM !! Flash !! EEPROM !! I/O pins+pads
|-
| Teensy 3.2 || MK20DX256 || Cortex M4 72MHz || 64K || 256K || 2K || 24+10 5V-tolerant
|-
| Teensy LC || MKL26Z64 || Cortex-M0+ 48 MHz || 8K || 62K || || 27
|-
| Teensy 3.5 || MK64FX512VMD12 || Cortex-M4F 120 MHz || 256K || 512K || || 40+18 5V-tolerant
|-
| Teensy 3.6 || MK66FX1M0VMD18 || Cortex-M4F 180 MHz || 256K || 1.25M || || 40+18
|-
| Teensy 4.0 || NXP iMXRT1062 || Cortex-M7 600 MHz || 1MB || 2M || || 24+10
|}

The Teensy 3.0, 3.1, 3.2 and LC are mostly pin-compatible with one-another. The LC model is a "low cost" variant.

Teensy 3.5 and 3.6 have a large number of pins, and are also pin-compatible with one-another. The Teensy 3.6 is not 5V-tolerant.