This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: AM1705
Hi,I'm using Extended Wait Mode (see this issue https://e2e.ti.com/support/processors/f/791/t/797265) with great success.
Now, I am about to start using the EMIFA Asynchronous Time Out Interrupt as described in "AM17x/AM18x ARM Microprocessor External Memory Interface A (EMIFA) User's Guide" (SPRUFVDA), page 45.
When monitoring the EMA_WR and the EMA_WAIT (using an oscilloscope) I can see how the AM1705 starts adding additional cycles when the EMA_WAIT is asserted - just as expected.When the EMA_WAIT is indefinitely asserted I can see how the AM1705 extends each write access cycle according to what I have specified in MAX_EXT_WAIT (AWCC) - also as expected.
However, the Asynchronous Time Out Interrupt is not issued until after several (20-30) write access cycles have failed to deassert EMA_WAIT.I would have expected it to be issued at the first write access cycle that fails to deassert EMA_WAIT within the time period specified by MAX_EMA_WAIT.
Could someone please help me understand this.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Mark Mckeown:
Based on your post, it sounds like the interrupt for the wait time out does occur but not as quickly as you expected. Can you tell us if a single wait time out results in an interrupt at some point in the future? I'm trying to determine if the issue you are reporting is the length of time between the timeout and the interrupt or if a number of timeouts need to occur before the interrupt is generated.
If you need more help, please reply back. If your question is answered, please click Verify Answer
In reply to Bill Taboada:
I haven't seen any posts from you recently. Have you resolved your issue?
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.