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fashion, receiving devices cannot return a busy status and should not drive
RxStatus onto the
For further information on the MediaLB Specification, please refer to the
MediaLB specification document available on
Operating Modes
The following sections describe the operating modes of the MLB
interface.
Streaming Channel Frame Synchronization
Certain types of streaming applications require data to be synchronous
with the MediaLB frame, including: stereo, 5.1 audio, and Generic Syn-
chronous Packet Format (GSPF) DTCP. This feature is provided as an
optional programmable synchronous logical channel by setting the
in the
MLB_CECRx
begins transmitting data only at a MediaLB frame boundary. A maskable
interrupt is generated when the loss of frame synchronization occurs.
In order to use this option, system software must program the
the
register with the expected number of physical channels per
MLB_CECRx
frame for the logical channel, and unmask the
the
register by setting the
MLB_CSCRx
interrupt is generated when the actual number of physical channels
detected during a MLB frame does not match the expected value. Software
can also set the
automatically disable a logical channel (clear the channel enable bit in the
register) when synchronization is lost.
MLB_CECRx
Frame synchronization is not supported for asynchronous, control or iso-
chronous channels.
ADSP-214xx SHARC Processor Hardware Reference
www.BDTIC.com/ADI
line.
MLBSIG
register. When enabled, the synchronous logical channel
bit in
FSCD
MLB_CSCRx
Media Local Bus
www.smsc-ais.com
interrupt bit (bit 6) in
STS
bit in
MASK
MLB_CECRx
register, which causes hardware to
.
bit
FSE
bits in
FSPC
register. An
8-7
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