Teensy 4.1 vs. Teensy 4.0

The Teensy 4.1 builds on the Teensy 4.0. The 4.1 board is the same size and footprint as the Teensy 3.5/3.6. Most technical specifications are the same as the Teensy 4.0, save for a few expanded features. Some of the more notable features include pins for an Ethernet port (10 / 100 Mbit DP83825 PHY), host USB port, options to expand memory with two locations to solder SOIC memory chips, and a microSD card socket. This runs off of the NXP iMXRT1062 IC , which is a 32-bit ARM Cortex-M7 . It is 3.3V tolerant only on its I/O pins.

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Teensy 4.1

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Teensy 4.0

The comparsion table between Teensy 4.1 and Teensy 4.0

Feature Teensy 4.0 Teensy 4.1
Processor IMXRT1062DVL6 IMXRT1062DVJ6
Flash memory 1984 kbytes 7936 kbytes
EEPROM 1080 (emu) bytes 4284 (emu) bytes
Digital I/O 40 pins 55 pins
Breadboard I/O 24 pins 42 pins
Analog Input 14 pins 18 pins
Total PWM outputs 26 pins 31 pins
Serial Ports 7 8
Ethernet - 1