ADSP-21368 SHARC Processor Hardware Reference 4-1
4 DIGITAL AUDIO/DIGITAL
PERIPHERAL INTERFACES
The digital audio interface (DAI) and the digital peripheral interface
(DPI) are comprised of a groups of peripherals and their respective signal
routing units (SRU1 and SRU2). The inputs and outputs of the peripher-
als are not directly connected to external pins. Rather, the SRUs connect
the peripherals to a set of pins and to each other, based on a set of config-
uration registers. This allows the peripherals to be interconnected to suit a
wide variety of systems. It also allows the ADSP-21367/8/9 and
ADSP-2137x SHARC processors to include an arbitrary number and vari-
ety of peripherals while retaining high levels of compatibility without
increasing pin count. Table 4-1 shows the peripherals that are assigned to
each SRU.
L
The peripherals listed in Table 4-1 represent the maximum in any
single processor. For a listing
Table 4-1. Signal Routing Unit Peripheral Assignments
DAI SRU1 DPI SRU2
1
Serial Ports (up to 8)
2
Timers (3)
S/PDIF Transmitter/Receiver Serial Peripheral Interface (2)
Interrupts (10) Two Wire Interface
Precision Clock Generators (4) Universal Asynchronous Receiver/
Transmitter (2)
Asynchronous Sample Rate
Converter (8 channels)
General-Purpose I/O (9)
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