Simultaneous Read and Write in AHB

Status
Not open for further replies.
F

fragnen

Full Member level 4
Joined
Apr 3, 2019
Messages
211
Helped
0
Reputation
0
Reaction score
1
Trophy points
18
Activity points
1,490
Does Read and Write can happen simultaneously in AHB?
 

Sort by date Sort by votes
How do you define simultaneous read and write? In AHB specification, HRDATA is shown to echo HWDATA at write cycle end. I won't consider this echo as simultaneous read write. Which AHB waveform do you expect for simultaneous read and write?
 

Upvote 0 Downvote
FvM said:
How do you define simultaneous read and write?
Click to expand...
By simultaneous READ and WRITE it is being indicated that Master can issue a READ and a WRITE transaction in the same clock cycle.
--- Updated ---

In AHB specification in the timing diagrams READ and WRITE waveforms are shown in the same diagram. From that it appears if it means simultaneous READ and WRITE is possible in AHB. Is that appearance correct?
 

Upvote 0 Downvote
As already stated, I see just a misunderstanding of AHB diagrams. Echo of write data has nothing to do with simultaneous read/write.
 

    F

    fragnen

    Points: 2
    Helpful Answer Positive Rating
Upvote 0 Downvote
FvM said:
As already stated, I see just a misunderstanding of AHB diagrams. Echo of write data has nothing to do with simultaneous read/write.
Click to expand...
What do you mean you echo of write data? What did you mean by "HRDATA is shown to echo HWDATA at write cycle end"

Do you want to mean that write and read cannot happen simultaneously in AHB?
 

Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…