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User’s Manual 323
Table C-5. Interrupts—Priority and Action to Clear Requests
Priority Interrupt Source Action required to clear the interrupt
Highest System Mode Violation Automatically cleared by the interrupt acknowledge.
Stack Limit Violation Automatically cleared by the interrupt acknowledge.
Write Protection Violation Automatically cleared by the interrupt acknowledge.
Secondary Watchdog Restart the Secondary Watchdog by writing to WDTCR.
External 1 Automatically cleared by the interrupt acknowledge.
External 0 Automatically cleared by the interrupt acknowledge.
Periodic (2 kHz) Read the status from the GCSR.
Quadrature Decoder Read the status from the QDSR.
Timer B Read the status from the TBSR.
Timer A Read the status from the TASR.
Input Capture Read the status from the ICCSR.
PWM Write any PWM register.
Slave Port
Rd: Read the data from the SPD0R, SPD1R or SPD2R.
Wr: Write data to the SPD0R, SPD1R, SPD2R or write a
dummy byte to the SPSR.
Serial Port E
Rx: Read the data from the SEDR or SEAR.
Tx: Write data to the SEDR, SEAR, SELR or write a dummy
byte to the SESR.
Serial Port F
Rx: Read the data from the SFDR or SFAR.
Tx: Write data to the SFDR, SFAR, SFLR or write a dummy
byte to the SFSR.
Serial Port A
Rx: Read the data from the SADR or SAAR.
Tx: Write data to the SADR, SAAR, SALR or write a dummy
byte to the SASR.
Serial Port B
Rx: Read the data from the SBDR or SBAR.
Tx: Write data to the SBDR, SBAR, SBLR or write a dummy
byte to the SBSR.
Serial Port C
Rx: Read the data from the SCDR or SCAR.
Tx: Write data to the SCDR, SCAR, SCLR or write a dummy
byte to the SCSR.
Lowest Serial Port D
Rx: Read the data from the SDDR or SDAR.
Tx: Write data to the SDDR, SDAR, SDLR or write a dummy
byte to the SDSR.