SAM D21/DA1 Family

29.4 Signal Description

Table 29-1. Host Mode
Pin Name	Pin Description	Type
MCKn	Host Clock for Clock Unit n	Input/Output
SCKn	Serial Clock for Clock Unit n	Input/Output
FSn	I²S Word Select or TDM Frame Sync for Clock Unit n	Input/Output
SDm	Serial Data Input or Output for Serializer m	Input/Output

Table 29-2. Client Mode
Pin Name	Pin Description	Type
MCKn	Host Clock	Input
SCKn	Serial Clock for Clock Unit n	Input
FSn	I²S Word Select or TDM Frame Sync	Input
SDm	Serial Data Input or Output for Serializer m	Input/Output

Table 29-3. Controller Mode
Pin Name	Pin Description	Type
MCKn	Host Clock for Clock Unit n	Output
SCKn	Serial Clock for Clock Unit n	Output
FSn	I²S Word Select or TDM Frame Sync	Output
SDm	Not Applicable	Not Applicable

Note: One signal can be mapped on several pins.

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