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| 型号： | EPXA4 |
| 厂商： | Altera Corporation |
| 英文描述： | Excalibur Devices |
| 中文描述： | 神剑设备 |
| 文件页数： | 9/34页 |
| 文件大小： | 277K |
| 代理商： | EPXA4 |
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Altera Corporation
9
Errata Sheet - Appendix A
A.2
Errata for the ETM9 Trace Module
See Table 1 on page 7 and associated text for an explanation of
categorisation.
A.2.1
Invalid data trace following FIFO overflow—Category 1
Note: ARM has updated the errata classifications. This is a category 1
erratum under the previous definition, which was:
‘Features which it is impossible, or very hard, to work around and are
likely to affect use of this device.’
Description
The
Embedded Trace Macrocell
(ETM) contains a small FIFO which under
some circumstances can overflow, leading to the loss of trace. This is
normal behavior.
However, if the FIFO overflows during an extended wait-state period
while attempting to capture data trace from a block data transfer
instruction, then the data trace can become invalid.
When trace is resumed:
■
■
Data values traced may be invalid until the next indirect branch.
Data addresses traced may be invalid until the next trace gap, or the
next periodic synchronization point.
Instruction trace is unaffected.
■
An example of how exactly the data trace becomes invalid is shown in
Table 2 on page 10. Note that, for simplicity, data address tracing is
ignored.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EPXA4F1020C1 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Altera Corporation 功能描述:IC EXCALIBUR ARM 1020FBGA |
| EPXA4F1020C1ES | 制造商:Altera Corporation 功能描述:IC EXCALIBUR ARM 1020FBGA |
| EPXA4F1020C2 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Altera Corporation 功能描述:IC EXCALIBUR ARM 1020FBGA |
| EPXA4F1020C2ES | 制造商:Altera Corporation 功能描述:IC EXCALIBUR ARM 1020FBGA |
| EPXA4F1020C3 | 制造商:Altera Corporation 功能描述:IC EXCALIBUR ARM 1020FBGA |
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