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| 型號(hào)： | AN2933 |
| 英文描述： | Understanding the eTPU Channel Hardware |
| 中文描述： | 理解硬件頻道的eTPU |
| 文件頁(yè)數(shù)： | 38/40頁(yè) |
| 文件大?。?/td> | 741K |
| 代理商： | AN2933 |
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Understanding the eTPU Channel Hardware, Rev. 0
Summary
Freescale Semiconductor
38
5.4
Dynamically Changing the Channel Configuration
In general it is not a good idea to change the channel mode once the channel is running. When this is
necessary, it is important to ensure that MRLs and TDL are not set during the transition. Also it is
important to note that match conditions that are blocked by one mode might be enabled with the mode
change.
When all of these precautions are ignored, it is probably best to refer to the Reference Manual and compare
the schematics (for example,
Figure 5
) of the two modes to determine the possible outcomes of the change.
6
Summary
The channel logic in the Time Processor Unit (TPU) could be setup in 32 different configurations (8 TBS
values times 4 PAC choices). If we consider only the modes, IPACS and OPACS, and ActionUnit
selections, there are 43,680 different configurations of the eTPU channels. This application note attempted
to simplify the process of making the selections to help the user select an optimal configuration for the
requirements.
This note has been double checked against the Reference Manual and the original eTPU Block Guide, and
any errors that were found have been corrected. If the user detects any inconsistency, or if this note appears
confusing in any way, please contact the author.
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