Datasheet

507
6120F–ATARM–03-Oct-06
AT91SAM7X512/256/128 Preliminary
• System interrupts
– Bus-off interrupt: The CAN module enters the bus-off state.
– Error-passive interrupt: The CAN module enters Error Passive Mode.
– Error-active Mode: The CAN module is neither in Error Passive Mode nor in Bus-
off mode.
– Warn Limit interrupt: The CAN module is in Error-active Mode, but at least one of
its error counter value exceeds 96.
– Wake-up interrupt: This interrupt is generated after a wake-up and a bus
synchronization.
– Sleep interrupt: This interrupt is generated after a Low-power Mode enable once
all pending messages in transmission have been sent.
– Internal timer counter overflow interrupt: This interrupt is generated when the
internal timer rolls over.
– Timestamp interrupt: This interrupt is generated after the reception or the
transmission of a start of frame or an end of frame. The value of the internal
counter is copied in the CAN_TIMESTP register.
All interrupts are cleared by clearing the interrupt source except for the internal timer counter
overflow interrupt and the timestamp interrupt. These interrupts are cleared by reading the
CAN_SR register.