AMBA AXI Interface questions

Hi,

I am looking at AMBA AXI interface and I have some confusion regarding the interface

I understand that it has separate data, address and response channels for the write side and data and address for read.

Is there any requirement on the write side that I can not send my second address/data until I receive VALID/READY high on n write response channel for my first write.

Please let me know

Thanks

Hi, yes without receiving ready for the current address, u cannot send the second address either it is outstanding or doesn't support outstanding feature.

Thanks Raghu.

But my questions is
Lets say I have sent my valid address on write address channel with valid high and i receive the ready from the slave. I have also send my write data same way on write data channel then I will receive a response on write response channel from the host saying that write repsonse available and slave asserts the valid and wait for the ready from the Master to go high.

I have done this for one data. Lets say if I am sending my second data. Can I send my 2nd address/data right after I have sent my first address/data or do I have to wait for receiving the response from slave through write response channels saying that we have finished the write or something like that or I have sent one address and since valid/ready was hight for that transaction. now I can send the next one instead of waiting for response for first channel

Yes u can send the second address without waiting for the response channel if the slave supports the multiple outstanding address. This depends on the slave implementation of ordering model. check the section 8.1 section of AXI spec about ordering model. hope it clears u.

Definitely you can initiate the second address or data before the response for the first transaction is sent from the slave.
It is purely dependent on the number of outstanding transactions that is supported - Generally it should be configurable.