Teensy 4.1 features the fastest micocontroller and an expanded set of powerful peripherals in a 2.4 by 0.7 inch form factor.
Teensy 4.0 can be programmed using the Arduino IDE with Teensyduino add-on.
Technical Specifications Compared to Teensy 4.0
Teensy 4.1 & 4.0 use the same IMXRT1062, so most technical specifications are the same.
Please refer to the Teensy 4.0 page for common specifications and features.
| Feature | Teensy 4.1 | Teensy 4.0 |
|---|---|---|
| Ethernet | 10 / 100 Mbit DP83825 PHY (6 pins) |
-none- |
| USB Host | 5 Pins with power management |
2 SMT Pads |
| SDIO (4 bit data) | Micro SD Socket | 8 SMT Pads |
| PWM Pins | 35 | 31 |
| Analog Inputs | 18 | 14 |
| Serial Ports | 8 | 7 |
| Flash Memory | 8 Mbyte | 2 Mbyte |
| QSPI Memory | 2 chips Plus Program Memory |
Program memory only |
| Breadboard Friendly I/O | 42 | 24 |
| Bottom SMT Pad Signals | 7 | 16 |
| SD Card Signals | 6 | 0 |
| Total I/O Pins | 55 | 40 |
Pinouts
Teensy 4.1 is designed to bring all general purpose I/O pins to breadboard friendly pads on the outside edges.
Ethernet
To use the Ethernet port, a magjack and capacitor need to be connected.
This is currently available only as a DIY project using this DIY kit here.
Memory Expansion
The bottom side of Teensy 4.1 has locations to solder 2 memory chips.
The smaller location is meant for a PSRAM chip AP Memory APS6404L or IPUS IPS6404L, see here for more info. The larger location is intended for flash memory.
USB Host
Teensy 4.1's USB Host port allow you to connect USB devices, like keyboards and MIDI musical instruments. A 5 pin header and a USB Host cable are needed to be able to plug in a USB device.
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