SAM D21 Xplained Pro

4.2.5 Serial Flash

The SAM D21 Xplained Pro has an onboard 8Mbit serial flash for non-voltatile storage of data.

Table 4-8. Serial Flash Connections
Pin on SAM D21	Function	Serial Flash	Shared functionality
PA13	GPIO	#CS	EXT3 PIN8 (default disconnected)
PB22	SERCOM5 PAD[2] SPI MOSI	SI	EXT3 and EDBG
PB16	SERCOM5 PAD[0] SPI MISO	SO	EXT3 and EDBG
PB23	SERCOM5 PAD[3] SPI SCK	SCK	EXT3 and EDBG

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.