What is outstanding transaction AXI?

What is outstanding transaction AXI?

outstanding transaction : when master initiates a transaction without waiting it to complete, it can issue next transaction. ooo txn: the order transactions are sent and the order the responses were received is not same.

What is multiple outstanding address in AXI?

Scenario 2: There is single master with capability of issuing different ID for different transactions. So if there is. A0 with ID 2 and A1 with ID 3, This scenario is called multiple outstanding address.

What is 4k boundary in AXI?

In reply to nup777: Addresses that are multiple of 4KB (say 4096, 4096*2, 4096*3 and so-on) are termed as 4KB address boundaries.

What is aligned and unaligned address in AXI?

32 bit value two lower address bits need to be zero to be aligned. a 32 bit value at 0x1000 is aligned but 0x1001, 0x1002, 0x1003 would all be unaligned. Memories are generally not 8 bits wide from an interface perspective as well as a geometry, depends on what kind of memory or where.

What is burst based transaction?

details. Each transaction is burst-based which has address and control information on the address channel that describes the nature of the data to be transferred. The data is transferred between master and slave using a write data channel to the slave or a read data channel to the master.

What is 1k boundary?

1 kilobyte is the smallest area an AHB slave may occupy in the memory map. Therefore,if a burst did cross a 1 kilobyte boundary, the access could start accessing one slave at the beginning of the burst and then switch to another on the boundary, which must not happen for the above reason.

What is 4KB boundary in AXI?

The granularity of mapping in AXI is 4KB. That means the smallest “block” of addresses that can be assigned to a given slave/peripheral is 4K*. And all allocations are multiples of 4K. So when you cross a 4K boundary you are potentially going from slave A’s address space to slave B’s.

What is burst length in AXI?

Burst length is number of data transfers for the burst like if ur burst length is 4 then the burst is 4 number of sequential data. now the burst size is like width of that each data, As per the AXI4 spec the burst size should be min of 8bits (1byte) that can be called as beat.

What are burst and transfers in AXI?

The AXI protocol is burst-based. The master begins each burst by driving control information and the address of the first byte in the transaction to the slave. As the burst progresses, the slave must calculate the addresses of subsequent transfers in the burst. A burst must not cross a 4KB address boundary.

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