Sparkfun

Teensy 4.1 [DEV-16996] - (AD54022)

Name: Teensy 4.1 [DEV-16996] - (AD54022)
Brand: Sparkfun
SKU: AD54022
Price: 45.95 USD
Availability: OutOfStock

$45.95 USD

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Description:

Teensy 4.1 is the latest version of the incredibly popular development platform, featuring a 600MHz ARM Cortex-M7 processor 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 has the same size and shape as the Teensy 3.6 (2.4 inches by 0.7 inches) and provides increased I/O capability, including an Ethernet PHY, an SD card socket, and a USB Host port.

When running at 600MHz, Teensy 4.1 consumes approximately 100mA of current and provides support for dynamic clock scaling. Unlike traditional microcontrollers, where changing the clock speed causes incorrect baud rates and other problems, Teensy 4.1's hardware and Teensyduino software are compatible with Arduino's timing functions and are designed to allow dynamic speed changes. Serial baud rates, audio streaming sample rates, and Arduino functions like delay() and millis(), and Teensyduino extensions like IntervalTimer and elapsedMillis, continue to work correctly while the CPU changes speed. Teensy 4.1 also provides a power-off feature. By connecting a button to the on/off pin, the 3.3V power supply can be completely turned off by holding the button for five seconds, and turned back on by briefly pressing the button. If a coin cell is connected to VBAT, Teensy 4.1's RTC also continues to keep track of the date and time while power is off. Teensy 4.1 can also be overclocked, well beyond 600MHz!

The ARM Cortex-M7 brings many powerful CPU features to a true real-time microcontroller platform. The Cortex-M7 is a dual-issue superscalar processor, meaning the M7 can execute two instructions per clock cycle, at 600MHz! Of course, executing two simultaneously depends on the compiler ordering the instructions and registers. Initial benchmarks have shown that Arduino-compiled C++ code tends to achieve two instructions around 40% to 50% of the time while doing intensive numerical work using integers and pointers. The Cortex-M7 is the first ARM microcontroller to use branch prediction. In M4, loops and other branching code take three clock cycles. With M7, after a loop has executed several times, branch prediction eliminates that overhead, allowing the branch instruction to execute in a single clock cycle.

Tightly Coupled Memory is a special feature that 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 for fetching instructions. The DTCM bus is actually a pair of 32-bit paths, allowing M7 to perform up to two separate memory accesses in the same cycle. These extremely high-speed buses are separate from the M7's main AXI bus, which accesses other memories and peripherals. 512 of memory can be accessed as tightly coupled memory. Teensyduino automatically allocates your Arduino sketch code to ITCM and all non-malloc memory usage 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 most of M7's memory access is done on the two tightly coupled buses, powerful DMA-based peripherals have excellent access to non-TCM memory for highly efficient I/O.

The Teensy 4.1 Cortex-M7 processor includes a Floating Point Unit (FPU) that supports both 64-bit "double" and 32-bit "float". With the M4 FPU on Teensy 3.5 and 3.6, and also Atmel SAMD51 chips, only the 32-bit float is hardware accelerated. Any use of double functions, doubles like log(), sin(), cos() means slow software-implemented math. Teensy 4.1 executes all of these with hardware FPU.

Note: Please note that Teensy 4.1 does not include headers and you will need to purchase them separately and solder them yourself.

Features: