First Things

• All Teensy boards are factory tested and loaded with a simple BLINK sketch before packaged
• As shipped this sketch is not USB Serial active and will not present as such on connecting to PC
• The first programming of a Teensy board takes a Button Press
• The Button on the Teensy is to enter Program mode, it is not a Reset button
• Pressing the Button puts the Teensy into a HID mode to present a link to program the Teensy
• Reference cards can be found here https://www.pjrc.com/teensy/pinout.html

Current Teensy boards use 32 bit ARM-Cortex microcontrollers

Includes Teensy ::

• LC (Cortex-M0+)
• 3.2 (Cortex-M4)
• 3.5, 3.6 (Cortex-M4, floating point unit with single precision (32Bit))
• 4 (Cortex-M7, floating point unit with single(32Bit) + double(64Bit) precision, 32kb intruction cache, 32kb data cache)

Early Teensy 1 and 2 are of 8 bit AVR type microcontrollers