Not applicable
Aug 21, 2018
04:38 AM
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Aug 21, 2018
04:38 AM
The ARM Cortex-M4 Reference Manual states in section 2.3.1 Bus Interfaces:
Unfortunately, I could not find anything in the XMC4500 Reference Manual, which addresses this statement. The closest I could find was the priority table Table 3-1 in section 3.2 Bus Matrix, which states that request from the CPU will be prioritized over request from other masters, but does not differentiate between CPU requests via ICode and DCode interface.
So my question is: Does the XMC4500 follow the recommendation? If a request form the ICode bus interface and the DCode bus interface arrive at the Prefetch Unit at the same time, will the DCode request be handled first?
If I simply overlooked something, while reading the manual, please point me to the correct spot.
Thank you for your answers.
Phillip
ARM strongly recommends that any external arbitration between the ICode and DCode AHB bus
interfaces ensures that DCode has a higher priority than ICode.
Unfortunately, I could not find anything in the XMC4500 Reference Manual, which addresses this statement. The closest I could find was the priority table Table 3-1 in section 3.2 Bus Matrix, which states that request from the CPU will be prioritized over request from other masters, but does not differentiate between CPU requests via ICode and DCode interface.
So my question is: Does the XMC4500 follow the recommendation? If a request form the ICode bus interface and the DCode bus interface arrive at the Prefetch Unit at the same time, will the DCode request be handled first?
If I simply overlooked something, while reading the manual, please point me to the correct spot.
Thank you for your answers.
Phillip
2 Replies
Aug 30, 2018
07:36 AM
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Aug 30, 2018
07:36 AM
Hi,
Yes, the XMC4500 follows the ARM recommendation.
Regards,
Jesus
Yes, the XMC4500 follows the ARM recommendation.
Regards,
Jesus
Not applicable
Aug 31, 2018
10:15 AM
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Aug 31, 2018
10:15 AM
Hi,
thank you for your help! Much appreciated.
Regards,
Phillip
thank you for your help! Much appreciated.
Regards,
Phillip