Specification ARM Cortex M7 at 600MHz1024K RAM 512K is tightly coupled 8 Mbyte Flash 64K reserved for recoveryEEPROM emulation USB Host Port2 chips Plus Program Memory55 Total I O Pins3 CAN Bus 1 with CAN FD 2 I2S Digital Audio1 S PDIF Digital Audio1 SDIO 4 bit native SD3 SPI all with 16 word FIFO7 Bottom SMT Pad Signals8 Serial ports32 general purpose DMA channels35 PWM pins42 Breadboard Friendly I O18 analog inputsCryptographic AccelerationRandom Number GeneratorRTC for date timeProgrammable FlexIOPixel Processing PipelinePeripheral cross triggering10 100 Mbit DP83825 PHY 6 pins microSD Card SocketPower On Off managementPre soldered Male HeadersDescription Model Teensy 4 1Processor Cortex M7 CPU at 600 MHzMemory 1024 KB RAM 512 KB tightly coupled 8 MB Flash memoryI O Pins 55 total pins 42 breadboard friendly pins includedInterfaces MicroSD card socket USB Host port 10 100 Mbit Ethernet PHYDimensions Approx 6 1 cm x 1 5 cm x 0 15 cmProduct Overview 1 The Teensy 4 1 is the newest iteration of the astoundingly popular development platform that features an ARM Cortex M7 processor at 600MHz with a NXP iMXRT1062 crossover MCU four times larger flash memory than the 4 0 and two new locations to optionally add more memory The Teensy 4 1 is the same size and shape as the Teensy 3 6 2 4in by 0 7in and provides greater I O capability including an ethernet PHY SD card socket and USB host port The best part of this version of Teensy 4 1 is that it incl