http://share.eepw.com.cn/share/download/id/194569
SIN210_BTOB_BUTTOM_Schematic
http://share.eepw.com.cn/share/download/id/194570
SIN210_BTOB_CPU_Schematic
http://share.eepw.com.cn/share/download/id/194571
SIN210_Datasheet
http://share.eepw.com.cn/share/download/id/194572
SIN210_Stamp_BOTTOM_Schematic
http://share.eepw.com.cn/share/download/id/194573
SIN210_Stamp_CPU_Schematic
http://share.eepw.com.cn/share/download/id/194574