ADSP-214xx SHARC Processor Hardware Reference 9-5
Digital Application/Digital Peripheral Interfaces
The DAI/DPI pin buffers have three signals which are used for input/out-
put to/from off-chip world and the 3rd for output enable.
The miscellaneous buffers have an input and an output and are used for
group interconnection.
Note that Figure 9-1 is a simplified representation of a DAI system. In a
real representation, the SRU and DAI would show several types of data
being routed from several sources including the following.
• Serial ports (SPORT)
• Precision clock generators (PCG)
• Input data port (IDP)
• Asynchronous sample rate converters (SRC)
• S/PDIF transmitter
• S/PDIF receiver
• Shift register
• DAI Interrupts (Miscellaneous)
Similarly, the DPI pin buffers are connected via the SRU2. The DPI
makes use of several types of data from a large variety of sources,
including:
• Peripheral timers
• Serial Peripheral Interfaces (SPI)
• Precision clock generators (PCG)
• Universal asynchronous Rx/Tx ports (UART)
• Two wire interface (TWI)
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