Analog Devices SHARC ADSP-214 Series Hardware Reference Manual page 451

indicates the signal type. When the protocol changes, output (signal) type
is noted.
For audio applications, the ADSP-214xx processors need information
about interrupt sources that correspond to waveforms (not event signals).
As a result, the falling edge of the waveform may be used as an interrupt
source as well. Programs may select any of these three conditions:
• Latch on the rising edge
• Latch on the falling edge
• Latch on both the rising and falling edge
Table 9-8 shows which interrupts are valid on rising and or falling edges
Table 9-8. DAI/DPI Interrupt Valid Edges
Interrupt Source
S/PDIF Rx
IDP_FIFO
IDP_DMA
SRC Mute Out
Miscellaneous (31–22)
UART Channel Bits 3–0
TWI Bits (4)
Miscellaneous Interrupt Bits
(5–13)
Use of the
DAI_IMASK_RE
notice and respond to rising edges, falling edges, both rising and falling
edges, or neither rising nor falling edges so they can be masked separately.
ADSP-214xx SHARC Processor Hardware Reference
www.BDTIC.com/ADI
Digital Application/Digital Peripheral Interfaces
DAI_IMASK_RE
Yes
Yes
Yes
Yes
Yes
DPI_IMASK_RE
Yes
Yes
Yes
or
DAI_IMASK_FE
DAI_IMASK_FE
Yes
No
No
Yes
Yes
DPI_IMASK_FE
No
No
Yes
registers allows programs to
9-37