參數(shù)資料
型號(hào)： EPXA4
廠商： Altera Corporation
英文描述： Excalibur Devices
中文描述： 神劍設(shè)備
文件頁(yè)數(shù)： 30/34頁(yè)
文件大?。?/td> 277K
代理商： EPXA4
30
Altera Corporation
Errata Sheet - Appendix A
1
Recognition of a watchpoint is said to be in progress if the last
memory access caused a watchpoint, but debug entry has not yet
completed.
If the above conditions are met then the debug entry mechanism fails to
behave in the defined manner and the device may return from debug and
execute from an incorrect address.
Implications
For each scenario the following implications are expected given the above
conditions:
Busy-waiting Coprocessor Instructions
In this form the debug request supersedes the currently executing
coprocessor instruction, which would normally not occur. As such the PC
is not the correct value as debug entry proceeds. Correspondingly, on
return from debug the standard return address calculation produces an
incorrect address and thus unintended or unpredictable device behaviour
may result.
Data Aborts
In this form the debug request causes correct debug entry and exit.
However, the link register address calculation for the return from the Data
Abort handler is incorrect. Correspondingly, on return from the Data
Abort handler unintended or unpredictable device behaviour may result.
Watchpoints
In this form the debug request causes debug entry first, but the
watchpoint is still pending and has yet to execute the next instruction
before it takes full effect. As debug entry has already occurred this next
instruction will be the first instruction within debug mode to be executed.
After this instruction executes, debug entry occurs for a second time, even
though the device is already in debug, and results in the premature exiting
of debug. Consequently, the return from debug is to an incorrect address
and thus unintended or unpredictable device behaviour may result.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)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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