User Manual

2/8/2018 Teensyduino - Add-on for Arduino IDE to use Teensy USB development board
https://www.pjrc.com/teensy/teensyduino.html 2/2
All communication is performed at full native 12 Mbit/sec USB speed. Serial includes built-in flow
control, so the effective speed will be as fast as your code can read, but unlike Arduino, you will not
lose incoming data if your sketch does not use Serial.read() quickly. When implementing Serial mode,
maximum speeds of approximately 1 Mbit/sec are commonly achievable.
Teensy has the same built-in peripherals as Arduio: analog inputs, SPI, I
2
C, PWM, and a real serial
port. For applications that need the serial port (MIDI, GPS modules, etc), Teensy is very easy to use,
because uploading takes place on the USB port, which is not shared with serial.
How Does Teensy 2.0 Compare With Arduino?
On May 19, 2012, Arduino Leonardo was released, using the same ATMEGA32U4 chip as Teensy
2.0. Currently no Arduino board offers hardware similar to Teensy++ 2.0.
Both Teensy 2.0 and Arduino Leonardo support USB Serial, Keyboard and Mouse. Both have similar
compatibility with all Arduino-based code. But there are several differences:
Teensy 2.0
USB MIDI, Disk, Joystick, RawHID &
Flight Sim Controls.
Optimized digitalWrite, digitalRead,
pinMode, etc.
3.5K extra program memory (smaller
bootloader)
International (non-US) keyboard
support.
Small form factor.
3.3 volt option & Tools > CPU Speed
menu.
Non-Serial USB (no driver install
message on Windows).
Uno reset emulation, Serial.print() in
setup() works.
Arduino Leonardo
9V unregulated power input, for easier use of external
power.
USB vs 9V automatic power selection.
Arduino shield form factor (check compatibility, some
only support Arduino Uno).
Hardware cloning is allowed.
Arduino brand name