The Cortex M7 on the 4.0 is a dual-issue superscalar processor capable of executing up to two 32-bit instructions per clock cycle initial tests showed this happening between 40-50% of the time on Arduino-compiled code. The 4.0’s 600 MHz clock vs the 72 MHz on the 3.2 doesn’t tell the whole story.
What does that extra fifteen cents buy? First, there’s performance. Incredibly, the Teensy 4.0 is priced at $19.95, as opposed to the $19.80 Teensy 3.2. I’ve chosen not to make the comparison with the Teensy 3.5 and 3.6, which are priced a little higher, in a larger form factor, and have SD card slots soldered on. I think the best comparison in this case is between the two boards that share the same form factor the Teensy 4.0 and the 3.2. When doing hardware reviews it’s crucial to choose the right comparison hardware. The unmarked round pads are test points used in manufacturing and are no-connects from the end-user’s perspective. Besides ten more GPIO pins, there are pads for an SD card interface using 4-bit SDIO, and D+ and D- lines for the second 480 Mbps USB interface. Flip the board over, and you start to see some of the extra power this board wields. A new red LED near the USB connector gives you some status information, while the traditional “Arduino LED” is orange. There’s the usual dual row of pin headers you can plug into a breadboard, a micro-USB connector, and reset button. The board looks superficially similar to the older 3.2, at least from the top. The board launches today, but I had a chance to test drive a couple of them in one of the East Coast Hackaday labs over the past few days. And it rings up at an MSRP of just $19.95 a welcomed price point, but not unexpected for a microcontroller breakout board. Programming? Easy: there’s an add-on to the Arduino IDE called Teensyduino that “just works”.
Of course, the new board is also packed with periperals, including two 480 Mbps USB ports, 3 digital audio interfaces, 3 CAN busses, and multiple SPI/I2C/serial interfaces backed with integrated FIFOs.
#Blink lite board make faster code#
The latest in the Teensy microcontroller development board line, the 4.0 returns to the smaller form-factor last seen with the 3.2, as opposed to the larger 3.5 and 3.6 boards.ĭon’t let the smaller size fool you the 4.0 is based on an ARM Cortex M7 running at 600 MHz (!), the fastest microcontroller you can get in 2019, and testing on real-world examples shows it executing code more than five times faster than the Teensy 3.6, and fifteen times faster than the Teensy 3.2. Paul Stoffregen did it again: the Teensy 4.0 has been released.
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