Teensy 4.1 specs, pinout & datasheets
The larger Teensy 4: the same 600 MHz Cortex-M7 with 8 MB of flash, an Ethernet PHY, a microSD socket and pads for extra PSRAM.
- Chip / SoC
- NXP i.MX RT1062
- CPU
- Arm Cortex-M7
- Clock
- 600 MHz
- RAM
- 1024 KB, plus pads for up to 16 MB PSRAM
- Flash
- 8 MB
- Storage
- microSD socket
- I/O voltage
- 3.3 V, not 5 V tolerant
- Released
- May 2020
- 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
- Chip / SoC
- NXP i.MX RT1062[1]
- CPU
- Arm Cortex-M7[3]
- Clock
- 600 MHz[1]
- RAM
- 1024 KB, plus pads for up to 16 MB PSRAM[1]
- Flash
- 8 MB[1]
- Storage
- microSD socket[1]
- I/O voltage
- 3.3 V, not 5 V tolerant[1]
- Ethernet
- 10/100 PHY on board (needs a MagJack kit)[1]
- USB
- Micro-USB, 480 Mbit/s; USB host pins[1]
- Upload limits
- 7.75 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?
- 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
Pinout
Pin names in firmware (3 pins)
| Chip pin | Board names |
|---|---|
| GPIO_EMC_40 | USB_HOST_POWER |
| USB_OTG2_DN | USB_HOST_DM |
| USB_OTG2_DP | USB_HOST_DP |
Gotchas
- 3.3 V only. Pins are not 5 V tolerant.[1]
What changed
Since the Teensy 4.0
| Spec | Teensy 4.0 | Teensy 4.1 |
|---|---|---|
| RAM | 1024 KB | 1024 KB, plus pads for up to 16 MB PSRAM |
| Flash | 2 MB (64 KB reserved) | 8 MB |
| Storage | — | microSD socket |
| Ethernet | — | 10/100 PHY on board (needs a MagJack kit) |
| USB | Micro-USB, 480 Mbit/s | Micro-USB, 480 Mbit/s; USB host pins |
History and use today
History
Released in May 2020, the 4.1 extended the Teensy 4.0 with more flash, Ethernet and storage in a longer board.[1]
Still useful for
A strong choice for data loggers, audio and networked controllers that outgrow an Arduino.
Sources
Spotted a mistake?
Every report is read by a person and checked against a source before anything changes. Please link one if you have it.