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Teensy 4.0 Development Board

by PJRC

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.

Teensy 4.0 can be programmed using the Arduino IDE with Teensyduino add-on.

Processor

Teensy 4.0 features an ARM Cortex-M7 processor at 600 MHz, with a NXP iMXRT1062 chip, the fastest microcontroller available today.

Benchmark results measured with CoreMark as an Arduino sketch. For an alterative to synthetic benchmarking, see this Digital Signature Speed Test.

Technical Specifications

  • ARM Cortex-M7 at 600 MHz
  • 1024K RAM (512K is tightly coupled)
  • 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
  • 1 S/PDIF Digital Audio
  • 1 SDIO (4 bit) native SD
  • 3 SPI, all with 16 word FIFO
  • 3 I2C, all with 4 byte FIFO
  • 7 Serial, all with 4 byte FIFO
  • 32 general purpose DMA channels
  • 31 PWM pins
  • 40 digital pins, all interrrupt capable
  • 14 analog pins, 2 ADCs on chip
  • Cryptographic Acceleration
  • Random Number Generator
  • RTC for date/time
  • Programmable FlexIO
  • Pixel Processing Pipeline
  • Peripheral cross triggering
  • Power On/Off management

Pinouts

Teensy 4.0 is the same size and shape as Teensy 3.2, and retains compatibility with most of the pin functions on Teensy 3.2.

Power Consumption & Management

When running at 600 MHz, Teensy 4.0 consumes approximately 100 mA current.

Teensy 4.0 provides support for dynamic clock scaling. Unlike traditional microcontrollers, where changing the clock speed causes wrong baud rates and other issues, Teensy 4.0 hardware and Teensyduino's software support for Arduino timing functions are designed to allow dynamically speed changes. Serial baud rates, audio streaming sample rates, and Arduino functions like delay() and millis(), and Teensyduino's extensions like IntervalTimer and elapsedMillis, continue to work properly while the CPU changes speed.

Teensy 4.0 also provides a power shut off feature. By connecting a pushbutton to the On/Off pin, the 3.3V power supply can be completely disabled by holding the button for 5 seconds, and turned back on by a brief button press. If a coin cell is connected to VBAT, Teensy 4.0's RTC also continues to keep track of date & time while the power is off.

Teensy 4.0 also can also be overclocked, well beyond 600 MHz!

Cortex-M7 Processor Details

ARM Cortex-M7 brings many powerful CPU features to a true real-time microcontroller platform.

Cortex-M7 is a dual-issue superscaler processor, meaning M7 can execute 2 instructions per clock cycle, at 600 MHz! Of course, executing 2 simultaneously depends upon the compiler ordering instructions and registers. Initial benchmarks have shown C++ code compiled by Arduino tends to achieve 2 instructions about 40% to 50% of the time while performing numerically intensive work using integers and pointers.

Cortex-M7 is the first ARM microcontroller to use branch prediction. On M4, loops and other code which much branch take 3 clock cycles. With M7, after a loop has executed a few times, the branch prediction removes that overhead, allowing the branch instruction to run in only a single clock cycle.

Tightly Coupled Memory is a special feature which allows Cortex-M7 fast single cycle access to memory using a pair of 64 bit wide buses. The ITCM bus provides a 64 bit path to fetch instructions. The DTCM bus is actually a pair of 32 bit paths, allowing M7 to perform up to 2 separate memory accesses in the same cycle. These extremely high speed buses are separate from M7's main AXI bus, which accesses other memory and peripherals. 512K of memory can be accessed as tightly coupled memory. Teensyduino automatically allocates your Arduino sketch code into ITCM and all non-malloc memory use to the fast DTCM, unless you add extra keywords to override the optimized default.

Memory not accessed on the tightly coupled buses is optimized for DMA access by peripherals. Because the bulk of M7's memory access is done on the 2 tightly coupled buses, powerful DMA-based peripherals have excellent access to the non-TCM memory for highly efficient I/O.

Teensy 4.0's Cortex-M7 processor includes a floating point unit (FPU) which supports both 64 bit "double" and 32 bit "float". With M4's FPU on Teensy 3.5 & 36, and also Atmel SAMD51 chips, only 32 bit float is hardware accelerated. Any use of double, double functions like log(), sin(), cos() means slow software implemented math. Teensy 4.0 executes all of these with FPU hardware.

12 customer reviews

15 days ago
Simply the best and most powerful MCU on the hobbiest market at the moment. Even the arduino setup works out of the box. So far I've tested I2C, SPI, Audio, USB audio, Rotary Encoder and SDIO card libs - all work flawlessly and fantastically well. Running some audio spectrum processing the Arm CMSIS libs for a 4096 FFT takes around 412us (0.4ms) including mag squared calcultions and all the various buffer copies - amazing stuff!
by Anonymous about Teensy 4.1 Development Board via REVIEWS.io
a year ago
As someone dealing with microcontrollers for the first time the teensy is excellent. Incredible performance for the size and while it doesn't have a massive community the examples that are part of the ide are really detailed.
by Harry about Teensy 4.1 Development Board via REVIEWS.io
2 years ago
Got one as soon as they were back in stock. Arrived quickly and well packaged. Couldn’t be happier with this amazing board/service!
by Andrew about Teensy 4.1 Development Board via REVIEWS.io
3 years ago
Nice little board with quite a bit of juice and a lot of connection options. Really nice that you can use it as a USB host, and that it has pinouts for ethernet too. Haven't tested all the stuff it can do, as I mainly use mine to run a DirtyWave M8 tracker/synth.
by Peder about Teensy 4.1 Development Board via REVIEWS.io
4 years ago
Fast delivery & well packaged. Using the Teensy 4.1 to run the "headless" version of the M8 tracking software - works great and setup was way easier than I expected.
by David about Teensy 4.1 Development Board via REVIEWS.io
4 years ago
I have soldered on the pins, and its running on my breadboard. I probably have not yet accessed 1 per cent of what this fantastic little board can do... I'm using Visual Studio Code with PlatformIO, all seems good so far....
by Martyn about Teensy 4.1 Development Board via REVIEWS.io
4 years ago
Absolutely wonderful card. Incredibly fast and stable. Lots of RAM and lots of flash memory. It is also possible to expand both RAM and flash by soldering circuits on the underside of the card. With good code examples and a content-rich forum. Works well to write code in both Arduino and Visual Studio. I really love this circuit
by Johan about Teensy 4.1 Development Board via REVIEWS.io
4 years ago
This is a high end microcontroller. The USB host interface works very well with some good examples in the library. You can solder two PSram chips on the bottom for a Whopping 16GB of ram!!
by Robert about Teensy 4.1 Development Board via REVIEWS.io
5 years ago
So far the board works and powers on. I'm yet to use other features on it but Very excited. Order was quick and will use this website more often
by DARREN about Teensy 4.1 Development Board via REVIEWS.io

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