Table of Contents
Where is AXI protocol used?
The protocol used by many SoC today is AXI, or Advanced eXtensible Interface, and is part of the ARM Advanced Microcontroller Bus Architecture (AMBA) specification. It is especially prevalent in Xilinx’s Zynq devices, providing the interface between the processing system and programmable logic sections of the chip.
What are the three types of AXI protocols?
In 2010, a new revision of AMBA, AMBA4, defined the AXI4, AXI4-Lite and AXI4-Stream protocol. AXI is royalty-free and its specification is freely available from ARM.
What is the difference between AMBA and AXI?
AXI was then invented. One of the major problems with the AHB protocol is its inability to support what are called ‘outstanding’ transactions. An outstanding transaction is simply the one, which has been issued but its response is awaited….
| AHB | AXI |
|---|---|
| Exclusive transfers are Not Supported | Exclusive transfers are supported. |
What are the responses in AXI?
The AXI protocol provides response signaling for both read and write transactions: for read transactions the response information from the slave is signaled on the read data channel. for write transactions the response information is signaled on the write response channel.
How many channels are there in AXI?
five channels
The AXI protocol defines five channels: three for write signals, and two for read signals.
What is deadlock situation in AXI?
A bus deadlock happens when each master in a set of masters is holding a slave and waiting for another slave held by another master in the set. In advanced bus/interface protocols such as AXI and OCP, a slave must return responses after some latency when it accepts a transaction request from a master.
What is AXI SRAM?
Product Description. The AXI EMC (Advanced Microcontroller Bus Architecture (AMBA®) Advanced extensible Interface (AXI) External memory controller) provides the control interface for external synchronous, asynchronous SRAM, Flash and PSRAM/Cellular RAM memory devices through the AXI interface.