ADSP-21368 SHARC Processor Hardware Reference 4-9
Digital Audio/Digital Peripheral Interfaces
Each input and output in each group is given a unique mnemonic. In the
few cases where a signal appears in more than one group, the mnemonic is
slightly different to distinguish between the connections. The convention
is to begin the name with an identifier for the peripheral that the signal is
coming to/from followed by the signal’s function as shown in Figure 4-5.
A number is included if the DAI contains more than one peripheral type
(for example, serial ports) or if the peripheral has more than one signal
that performs this function (for example, IDP channels). The mnemonic
always ends with
_I if the signal is an input, or with _O if the signal is an
output.
Note that it is not possible to connect a signal in one group directly to a
signal in a different group (analogous to wiring from one patch bay to
another). However, group D (in SRU1) is largely devoted to routing in
this vein.
Group E Interrupts and miscellaneous
signals
N/A
Group F Pin enable signals used to spec-
ify whether each DAI pin is
used as an output or an input.
N/A
Figure 4-5. Example SRU Mnemonic
Table 4-2. Pin Signal Group Assignments (Cont’d)
Signal Group DAI (SRU1) DPI (SRU2)
SPORT0_CLK_O
PERIPHERAL
(SERIAL PORT 0)
SIGNAL’S FUNCTION
(CLOCK)
DIRECTION; RELATIVE TO
SIGNAL’S PERIPHERAL (OUTPUT)
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