SAM L22 Device Datasheet
Web page: http://www.atmel.com/products/microcontrollers/arm/sam-l.aspx?tab=documents
Document: Atmel SAM L22 Datasheet.pdf
SAM L22 Xplained Pro User Guide and Schematics
Web Page: http://www.atmel.com/tools/ATSAML22-XPRO.aspx?tab=documents
Atmel Segment LCD1 Xplained Pro User Guide
Web link: http://www.atmel.com/Images/Atmel-42076-Segment-LCD1-Xplained-Pro_User-Guide.pdf