Dai/Dpi Interrupt Mask Events - Analog Devices SHARC ADSP-214 Series Hardware Reference Manual

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There are two signal naming conventions: the DPI interrupt con-

troller bits are named

signals are named

Signals from the SRU2 group C can be used to generate interrupts. For

example, when

from the miscellaneous channel 8

to one, the DPI triggers an interrupt in the core and the interrupt latch is

set. A read of this bit does not reset it to zero. The bit is only set to zero

when the cause of the interrupt is cleared. A DPI interrupt indicates the

source (in this case, miscellaneous, Channel 8), and checks the IVT for an

instruction (next operation) to perform.

provides an overview of DPI miscellaneous interrupts.

Table 9-7. DPI Miscellaneous Interrupt Overview

Interrupt Condition

– Rising edge

(9 channels)

– Falling edge

– Rising/falling edge

DAI/DPI Interrupt Mask Events

For interrupt sources that correspond to waveforms (as opposed to DAI

event signals such as DMA complete or buffer full), the edge of a wave-

form may be used as an interrupt source as well. Just as interrupts can be

generated by a source, interrupts can also be generated and latched on the

rising (or falling) edges of a signal.

Only the DAI interrupt controller latches interrupts on both edges.

This ability does not exist in the core interrupt controller.

When a signal comes in, the system needs to determine what kind of sig-

nal it is and what kind of protocol, as a result, to service. The preamble

www.BDTIC.com/ADI

DPI_13-5_INT

ADSP-214xx SHARC Processor Hardware Reference

and its corresponding SRU

is set to one, any signals

generates an interrupt. If set

Read-to-clear

+ RTI instruction

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