Media Local Bus (MLB)
PXN20 Microcontroller Reference Manual, Rev. 1
27-18 Freescale Semiconductor
Table 27-18. CECRn Field Descriptions
Field Description
CE Channel n Enable.
0 Channel n disabled.
1 Channel n enabled.
TR Channel n Transmit Select.
0 Receive.
1 Transmit.
CT[1:0] Channel n Type Select.
00 Synchronous.
01 Isochronous.
10 Asynchronous.
11 Control.
FSE Frame Synchronization Enable. When set, enables Streaming Channel Frame Synchronization for this logical
synchronous channel. This field is valid for synchronous channels only.
0 Disable frame synchronization for synchronous channels.
1 Enable frame synchronization for synchronous channels.
FCE Flow Control Enable. When set, allows an isochronous RX channel to generate the ReceiverBusy (10h) response.
This field is valid for isochronous channels only.
0 Disable flow control for isochronous channels.
1 Enable flow control for isochronous channels.
MDS
[1:0]
Channel n Mode Select.
00 DMA Ping-pong buffering enabled.
01 DMA Circular buffering enabled.
10 Reserved.
11 Reserved.
MLFS Mask Lost Frame Synchronization. When set, masks Lost Frame Synchronization channel interrupts for this logical
channel.
0 Enable Lost Frame Synchronization channel interrupts for this logical channel.
1 Disable Lost Frame Synchronization channel interrupts for this logical channel.
MBE Mask Buffer Error. When set, masks Buffer Error channel interrupts for this logical channel.
0 Enable Buffer Error channel interrupts for this logical channel.
1 Disable Buffer Error channel interrupts for this logical channel.
MBS Mask Buffer Start. When set, masks Buffer Start channel interrupts for this logical channel.
0 Enable Buffer Start channel interrupts for this logical channel.
1 Disable Buffer Start channel interrupts for this logical channel.
MBD Mask Buffer Done. When set, masks Buffer Done channel interrupts for this logical channel.
0 Enable Buffer Done channel interrupts for this logical channel.
1 Disable Buffer Done channel interrupts for this logical channel.
MDB Mask Detect Break. When set, masks detect break channel interrupts for this logical channel. This bit is valid for
asynchronous and control channels only.
0 Enable detect break channel interrupts for this logical channel.
1 Disable detect break channel interrupts for this logical channel.
MPE Mask Protocol Error. When set, masks Protocol error channel interrupts for this logical channel. This bit is valid for
all RX channel types and valid for only asynchronous and control TX channels.
0 Enable protocol error channel interrupts for this logical channel.
1 Disable protocol error channel interrupts for this logical channel.
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