SPORT Operation Modes
5-28 ADSP-21368 SHARC Processor Hardware Reference
• The multichannel transfer is received on channel 0 (word 0), and
transmits on channels 1 and 2 (word 1 and 2).
Frame Syncs in Multichannel Mode
In previous SHARC processors, all receiving and transmitting devices in a
multichannel system had to use the same timing reference. In the
ADSP-21367/8/9 and ADSP-2137x processors, SPORTs operate inde-
pendently and each use its own frame sync signal programmed using
SRU1. For more information, see “Group C Connections—Frame Sync
Signals” on page 4-31.
The frame sync signal synchronizes the channels and restarts each multi-
channel sequence. The
SPORTx_FS signal initiates the beginning of the
channel 0 data word.
In the ADSP-21367/8/9 and ADSP-2137x processors, each SPORT has
its own transmit data valid signal, which is active during transmission of
an enabled word.
Figure 5-5. Multichannel Operation
SPORT1_CLK
SPORT1_DA/B
SPORT1_FS
B0
IGNORED
SPORT0_DA/B
B2B3 B0 B3 B2B1
WORD 0 WORD 1 WORD 2
SPORT0_TDV
B1B2B2
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