“Teensy 4.1 is now available with access more I/O and memory expansion.
Teensy 4.1 features a 10/100 Mbit Ethernet PHY.
The Ethernet port also has IEEE1588 precision packet timestamping.
Fast Ethernet opens up possibility for low latency & high bandwidth Artnet LED projects, streaming audio, open sound control and other Ethernet-based protocols that were difficult to accomplish with a traditional SPI-based Ethernet shield. Traditionally use of Ethernet in a project has involved a choice of single board computers with high bandwidth Ethernet using systems not designed for low latency tasks, versus microcontrollers designed for real-time tasks but with slow Ethernet or lacking performance to handle Ethernet’s speed. Teensy 4.1 with a Cortex-M7 processor at 600 MHz opens up the possibility to use the high bandwidth and low latency of Ethernet on a microcontroller designed for real-time tasks.
Teensy 4.1 includes a USB host port, supporting 480 Mbit/sec high speed USB. While Teensy 4.0 has those USB host data signals on surface mount pads, Teensy 4.1 adds the hot-plugging power management needed to simply connect a USB host cable and be able to plug in a USB device. Or a USB hubs can be used to connect many USB devices.”