Teensy 3.5 is a small and breadboard compatible development board. It uses a 32-bit ARM Cortex M4 processor. All digital and analog inputs are 5V compatible.

Teensy 3.5 Development Board Features:

• 120MHz ARM Cortex-M4 processor with floating-point calculation support
• 512K Flash, 192K RAM, 4K EEPROM memory
• MK64FX512VMD12 microcontroller
• 1pcs CANBUS port
• 16 DMA channels for general use
• Input/output pins with 5V tolerance
• 25 analog inputs, 2 13-bit resolution ADC
• 62 input/output pins (42 can be used with breadboard)
• 2 analog outputs, DAC with 12-bit resolution
• 20pcs PWM output
• USB port with full speed (12 Mbit/s) support
• Native (4-bit SDIO) micro SD card support
• Ethernet connection support with 100 Mbit/s support
• I2S audio output, support 4 channel digital audio input/output
• 14 hardware timers
• Cryptographic accelerator unit
• Random number generator
• Real time clock (real time clock)
• CRC calculation unit
• 6 serial ports (2 FIFO and fast baud rate support)
• 3pcs I2C ports
• 3 SPI ports (1 offers FIFO support)