Datasheet

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SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
34.6.3 Interrupt
The TWI interface has an interrupt line connected to the Interrupt Controller. In order to handle interrupts, the
Interrupt Controller must be programmed before configuring the TWI.
Table 34-5. Peripheral IDs
Instance ID
TWI0 19
TWI1 20