CHAPTER 22:Media Local Bus Interface (MediaLB)
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S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G
Abbreviations
This section lists the terms and abbreviations used in this chapter.
Table 1-1 Terms and Abbreviations
Term
Meaning
MediaLB
The function block that implements MediaLB (Media Local Bus), which is a local bus
specification, for connecting IC devices with a MOST (Media Oriented System
Transport), which is a multimedia-type in-vehicle LAN standard network.
Quadlet
Indicates a 4-byte unit.
Sync data
Data of stream signals, such as audio data.
Async data
Packet data.
Control data
Data of control signals.
Local channel buffer
The data storage area in the MediaLB
IO mode
The mode capable of exchanging transmission/reception data with the MediaLB from
CPU.
DMA mode
The mode in which the MediaLB operates as the bus master of the AHB bus.
Transmission/reception data is exchanged between the MediaLB and system memory
via the AHB bus.
Current buffer
The data area on the AHB bus that is read/written in DMA mode.
Current buffer address
Indicates the address area that is output next on the AHB bus in DMA mode after
processing the current buffer area. Set in the channel n next buffer configuration register
(MLBn_CNBCRn).
Previous buffer
The data area processed before the current buffer in DMA mode.
Previous buffer address
The address area processed before the current buffer in DMA mode.
Ping-pong buffering
One of two data transfer methods in DMA mode.
If the current buffer is filled, an interrupt occurs when moving to the next buffer and so
the next address to be used next can be set again by software.
Therefore, it is possible to transmit/receive data while changing the transfer destination
data storage area one after another.
Circular buffering
One of two data transfer methods in DMA mode.
Performs data transfers repeatedly for the data storage area indicated by the current
buffer. No interrupt occurs at the completion of a transfer.
n
Indicates a logical channel number (n=0..15)
Summary of Contents for S6J3200 Series
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