Teensy 4.1 with Headers

The Teensy 4.1 is the latest version of a highly popular development platform. It boasts an impressive ARM Cortex-M7 processor running at 600MHz and incorporates the NXP iMXRT1062 chip. Compared to its predecessor, the Teensy 4.0, it offers four times the flash memory capacity and introduces two additional memory expansion options. The Teensy 4.1 maintains the compact size and shape of the Teensy 3.6, measuring 2.4 inches by 0.7 inches. However, it enhances the input/output capabilities by including features such as an ethernet PHY, an SD card socket, and a USB host port. Notably, the Teensy 4.1 comes with pre-attached headers, eliminating the need for soldering and allowing for quick and easy setup.

At its maximum operating speed of 600 MHz, the Teensy 4.1 consumes around 100mA of current. It supports dynamic clock scaling, which means that clock speed changes do not affect the accuracy of baud rates and other timing functions, unlike traditional microcontrollers. The hardware of the Teensy 4.1, along with the Teensyduino software's support for Arduino timing functions, is designed to accommodate dynamic speed changes seamlessly. This ensures that serial baud rates, audio streaming sample rates, Arduino functions like delay() and millis(), as well as Teensyduino's extensions like IntervalTimer and elapsedMillis, continue to function correctly even as the CPU speed fluctuates. Additionally, the Teensy 4.1 incorporates 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. A brief press of the button restores power. Furthermore, if a coin cell is connected to VBAT, the Teensy 4.1's RTC (Real-Time Clock) can keep track of the date and time while the power is off. It's worth noting that the Teensy 4.1 also has the ability to be overclocked well beyond its default speed of 600MHz.

• ARM Cortex-M7 at 600MHz
• 1024K RAM (512K is tightly coupled)
• 8 Mbyte Flash (64K reserved for recovery & EEPROM emulation)
• USB Host Port
• 2 chips Plus Program Memory
• 55 Total I/O Pins
• 3 CAN Bus (1 with CAN FD)
• 2 I²S Digital Audio
• 1 S/PDIF Digital Audio
• 1 SDIO (4 bit) native SD
• 3 SPI, all with 16 word FIFO
• 7 Bottom SMT Pad Signals
• 8 Serial ports
• 32 general purpose DMA channels
• 35 PWM pins
• 42 Breadboard Friendly I/O
• 18 analog inputs
• Cryptographic Acceleration
• Random Number Generator
• RTC for date/time
• Programmable FlexIO
• Pixel Processing Pipeline
• Peripheral cross triggering
• 10 / 100 Mbit DP83825 PHY (6 pins)
• microSD Card Socket
• Power On/Off management
• Pre-soldered Male Headers

• Teensy Quick Start
• Teensyduino Software
• Teensy Help Page and FAQ