The ADSP-BF54x processor provides a Media Transceiver
(MXVR) MAC layer, allowing the processor to be connected
directly to a MOST®2 network through just an FOT or Electrical
PHY.
The MXVR is fully compatible with the industry standard standalone
MOST controller devices, supporting 22.579 Mbps or
24.576 Mbps data transfer. It offers faster lock times, greater jitter
immunity, a sophisticated DMA scheme for data transfers,
and the high-speed internal interface to the core and L1 memory
allows the full bandwidth of the network to be utilized. The
MXVR can operate as either the network master or as a network
slave.
The MXVR supports synchronous data, asynchronous packets,
and control messages using dedicated DMA channels which
operate autonomously from the processor core moving data to
and from L1 memory. Synchronous data is transferred to or
from the synchronous data physical channels on the MOST bus
through eight programmable DMA channels. The synchronous
data DMA channels can operate in various modes including
modes which trigger DMA operation when data patterns are
detected in the receive data stream. Furthermore two DMA
channels support asynchronous traffic and a further two support
control message traffic.