Texas Instruments TMS320C67X/C67X+ DSP Interrupt Acknowledgment Iack and Interrupt Number INUMn

Overview

5.1.1.4Interrupt Acknowledgment (IACK) and Interrupt Number (INUMn)

The IACK and INUMn signals alert hardware external to the C6000 that an interrupt has occurred and is being processed. The IACK signal indicates that the CPU has begun processing an interrupt. The INUMn signal (INUM3− INUM0) indicates the number of the interrupt (bit position in the IFR) that is being processed. For example:

INUM3 = 0 (MSB)

INUM2 = 1

INUM1 = 1

INUM0 = 1 (LSB)

Together, these signals provide the 4-bit value 0111, indicating INT7 is being processed.

SPRU733 Interrupts 5-5