Teensy 4.0

SKU: PJ-TEENSY4
Price
$52.88
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Description

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

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

The ARM Cortex-M7 brings many powerful CPU features to a true real-time microcontroller platform. Cortex-M7 is a dual-issue superscaler processor, meaning the M7 can execute two instructions per clock cycle, at 600MHz! Of course, executing two simultaneously depends upon the compiler ordering instructions and registers. Initial benchmarks have shown C++ code compiled by Arduino tends to achieve two 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 three 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 two 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 two 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 & 3.6, 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.

Note: Please be aware that the Teensy 4.0 does not include headers and will need to be purchased separately and soldered on yourself.

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FAQ

How do you Ship your Raspberry Pis?

We ship via Australia Post eParcel from our Sydney warehouse.

Australia Post picks up from us daily.

Asll shipping methods we use have tracking.

Do you ship from Sydney, Australia?

All our products ship from our warehouse in Sydney, Australia.

What payment methods do you accept?

We accept all major credit cards, Apple Pay, Google Pay and PayPal.

We also accept purchase orders from educational and government institutions on 30-day terms.

You're automatically approved if you're a school, university, or state or federal government department or agency.

What is your return, exchange and warranty policy?

Returns

We accept returns for faulty products, but will first work with you to help get your Raspberry Pi working again.

99% of the time there it is not the Raspberry Pi that is faulty.

If you need help, reach out to us on help@littlebird.com.au.

Change of Mind

We are happy to accept a return for a "change of mind", however, you will need to cover the cost of any merchant fees associated with the return. Goods need to be in an "as new" state.

What's the warranty on your Raspberry Pis?

You can have peace of mind knowing that Raspberry Pi is backed by a 1-year warranty, and thanks to rigorous quality assurance testing in the UK factory, you can be sure that your Raspberry Pi will stay in good working condition.

How long does shipping and delivery take?

At our Sydney, Australia warehouse, we provide fast and reliable shipping. To go even further, we have created our own Raspberry Pi powered Robot called Bishop.

How long does delivery take?

Australia Post picks up from us daily. If you're within the Australia Post next day network you can usually expect your order to arrive the next day if ordered with Express Post before 2pm.

80% of Australian addresses covered and you probably already know if you're in the network.

How can I track my order?

When we ship your order (which we do daily), we send you a tracking link.

If you haven't received a tracking link, please email us on help@littlebird.com.au .

How do I contact customer service?

You can call us on 1300 240 817 or email help@littlebird.com.au .

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