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Teensy 4.0 specs, pinout & datasheets

Microcontroller board · PJRC · Released August 2019

A 600 MHz Arm Cortex-M7 on a 35 × 18 mm board: one of the fastest Arduino-compatible microcontrollers.

Chip / SoC
NXP i.MX RT1062
CPU
Arm Cortex-M7
Clock
600 MHz
RAM
1024 KB
Flash
2 MB (64 KB reserved)
I/O voltage
3.3 V, not 5 V tolerant
Released
August 2019
Status
In production

Draft entry: these specs were compiled from the linked sources and are waiting for a second check. Spotted a mistake? Use the form at the end of the page.

Specifications

8 specs
Chip / SoC
NXP i.MX RT1062[1]
CPU
Arm Cortex-M7[3]
Clock
600 MHz[1]
RAM
1024 KB[1]
Flash
2 MB (64 KB reserved)[1]
I/O voltage
3.3 V, not 5 V tolerant[1]
USB
Micro-USB, 480 Mbit/s[1]
Upload limits
1.94 MB flash, 512 KB RAM[4]

Upload limits are what a sketch or firmware may use after the bootloader, as the build tools enforce them, not the chip’s full memory.

Can I still use it?

4 platforms
Arduino framework
Supported[2]Teensyduino add-on for the Arduino IDE.
MicroPython
Supported[7]
CircuitPython
Supported[6]
Zephyr RTOS
Supported[5]

As published by each project, checked weekly. A platform not listed has no published information here, which is not the same as no support.

Datasheets and documents

1 documents

Pinout

2 pins
Pin names in firmware (2 pins)
From the firmware’s board definition[8]
Chip pinBoard names
USB_OTG2_DNUSB_HOST_DM
USB_OTG2_DPUSB_HOST_DP

Gotchas

2 known issues
  • 3.3 V only. Teensy 4 pins are not 5 V tolerant, unlike some earlier Teensy boards.[1]
  • It gets warm at 600 MHz. The chip runs warm at full speed; PJRC documents a slower clock setting for low-power use.[1]

What changed

From the specs

Next came the Teensy 4.1

SpecTeensy 4.0Teensy 4.1
RAM1024 KB1024 KB, plus pads for up to 16 MB PSRAM
Flash2 MB (64 KB reserved)8 MB
Storage—microSD socket
Ethernet—10/100 PHY on board (needs a MagJack kit)
USBMicro-USB, 480 Mbit/sMicro-USB, 480 Mbit/s; USB host pins

History and use today

Editorial

History

Released in August 2019, the Teensy 4.0 brought a 600 MHz crossover processor to a tiny board at under $20.[1]

Still useful for

The go-to for audio processing, MIDI and fast control loops with Arduino code.

Sources

8 sources
  1. Teensy 4.0, PJRC
  2. Teensy, PJRC
  3. i.MX RT1060 crossover MCU, NXP
  4. PlatformIO board definition (teensy40) at 4adab0aa96
  5. Zephyr board definition (teensy40) at 3c61a12bdd
  6. CircuitPython board definition (teensy40) at 83b54473a1
  7. MicroPython board definition (TEENSY40) at 19e685eca9
  8. CircuitPython pin definitions (teensy40) at 395b187017

Spotted a mistake?

Reviewed by hand

Every report is read by a person and checked against a source before anything changes. Please link one if you have it.

Report a mistake