Teensy 4.1 DEV-16771Features & Specs 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