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The Teensy 4.1 is the newest iteration of the astoundingly popular development platform that features an ARM Cortex-M7 processor at 600MHz, with an NXP iMXRT1062 chip, four times larger flash memory than the 4.0, and two new locations to optionally add more memory.
The Teensy 4.1 is the same size and shape as the Teensy 3.6 (2.4in by 0.7in) and provides greater I/O capability, including an ethernet PHY, SD card socket, and USB host port.
When running at 600 MHz, this Teensy board consumes approximately 100mA current and provides support for dynamic clock scaling. Unlike traditional microcontrollers, where changing the clock speed causes wrong baud rates and other issues, Teensy 4.1 hardware and Teensyduino’s software support for Arduino timing functions are designed to allow dynamic 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 microcontroller 4.1 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 five seconds and being turned back on by a brief button press.
If a coin cell is connected to VBAT, this board's RTC also continues to keep track of the date & time while the power is off. Teensy 4.1 also can also be overclocked, well beyond 600MHz!
Teensy 4.1’s Cortex-M7 processor includes a floating-point unit (FPU) that supports both 64-bit “double” and 32-bit “float”. With M4’s FPU on Teensy 3.5 & 3.6, and also Atmel SAMD51 chips, the only 32-bit float is hardware accelerated.
Any use of double, double functions like log(), sin(), and cos() means slow software-implemented math. The 4.1 Teensy development board executes all of these with FPU hardware.
1 x Teensy 4.1 Development Board
| Processor |
ARM |
| Core |
Cortex-M7 |
| Ethernet |
10 / 100 Mbit DP83825 PHY (6 pins) |
| USB Host |
5 Pins with power management |
| SDIO (4-bit data) |
Micro SD Socket |
| PWM Pins |
35 |
| Analog Inputs |
18 |
| Serial Ports |
8 |
| Flash Memory |
8 Mbyte |
| QSPI Memory |
2 chips Plus Program Memory |
| Breadboard Friendly I/O |
42 |
| Bottom SMT Pad Signals |
7 |
| SD Card Signals |
6 |
| Total I/O Pins |
55 |
| Dimensions(L x W) |
60.96 x 17.78 mm |
| Weight |
8gm |
ARM
Cortex-M7
10 / 100 Mbit DP83825 PHY (6 pins)
5 Pins with power management
Micro SD Socket
35
18
8
8 Mbyte
2 chips Plus Program Memory
42
7
6
55
60.96 x 17.78 mm
8gm
Yes, the Teensy 4.1's serial ports which support USART (Universal Synchronous/Asynchronous Receiver/Transmitter) can handle baud rates of up to 2 Mbps (megabits per second). The Teensy 4.1 is appropriate for applications that need quick and dependable serial connection because of its high-performance ARM Cortex-M7 processor and adaptable hardware, which enable it to achieve high-speed communication rates.
No, an Ethernet shield is not included with the Teensy 4.1 development board. But it has an Ethernet PHY (Physical Layer) port that enables you to attach an external Ethernet shield or module to use networking features.
Using the Arduino IDE, C and C++ programming is supported on the Teensy 4.1. Because it works with the Arduino ecosystem, users can incorporate pre-existing libraries and resources into their projects.
Yes, you may easily interact with a variety of sensors, actuators, and communication modules for your projects due to the Teensy 4.1's many GPIO pins, PWM pins, analog inputs, and serial ports.
Yes, the Teensy 4.1 is suited for applications needing exact timing and responsiveness because of its potent Cortex-M7 processor and cutting-edge hardware capabilities, which enable it to handle real-time operations and multitasking efficiently.
Yes, in addition to the Arduino IDE, the Teensy 4.1 is compatible with a number of other third-party development tools and IDEs. Platforms such as PlatformIO and embedXcode enable users to build with flexibility, selecting the development environment of their choice.
