Adafruit ATSAMD09 Breakout with seesaw

Adafruit seesaw is a near-universal converter framework which allows you to add add and extend hardware support to any I2C-capable microcontroller or microcomputer.

Product video:

Features:

• 3 x 12-bit ADC inputs
• 3 x 8-bit PWM outputs
• 7 x GPIO with selectable pullup or pulldown
• 1 x NeoPixel output (up to 340 pixels)
• 1 x EEPROM with 64 byte of NVM memory (handy for storing small access tokens or MAC addresses)
• 1 x Interrupt output that can be triggered by any of the accessories
• 2 x I2C address selection pins
• 1 x Activity LED

Please note: The boards do not come with a bootloader. If you want to do development on seesaw (e.g. changing the configuration) you'll need to pick up a J-Link and we recommend a SWD adapter breakout. Adafruit doesn't provide any support for custom builds of seesaw.

Technical Details:

• Uses I2C address 0x49 - can be changed to 0x4A, 0x4B or 0x4C
• Product Dimensions: 32.0mm x 12.0mm x 3.5mm 
• Product Weight: 1.6g
• Adafruit seesaw guide