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Asynchronous FIFOs are FIFO designs in which data values are written to a FIFO buffer from a single clock. domain, and the data values are read from the same FIFO buffer from another clock domain.
Domains are not synchronous with one another. Asynchronous FIFOs are used to securely transfer data from one clock domain to another.
There are numerous approaches to asynchronous FIFO architecture, including numerous incorrect approaches. 90% of the time, badly implemented FIFO designs work properly.
Most almost-correct FIFO designs work correctly 99% of the time. Unfortunately, FIFOs that work properly 99% of the time have design flaws that are either the most difficult to detect and debug.
When one perform sequential read and write operations, one can meet two conditions of intersection of locations recorded in the read and write pointers.
The condition of EMPTY FIFO occurs when the rate of reading exceeds the rate of write and the read pointer catches up to the write pointer.
Second, when the write rate is higher than the read rate, the write pointer catches up to the read pointer by completing a cycle of FIFO.
The Global Asynchronous FIFO market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
ZIP CORE’s Asynchronous FIFO designed for extremely fast operation. Data width and depth are both customizable.
When synchronising between multiple clock domains, the component employs Gray-coded read/write pointers for maximum reliability.
Perfect for asynchronous interfaces when performance is essential. Design Highlights-Dual-clock design – Configurable data width – 8 or 16 entry depth- Read/write pointers with grayscale coding – FIFO Flags for Full and Empty- Simple valid-ready pipeline interface protocol – AMBA AXI4-stream,
Altera® Avalon-ST, and Xilinx local-link compatible – 400 MHz+ operation on basic FPGA devices Applications- Synchronization of clock domains- Enabling and disabling the datapath on and off the chip- General-purpose buffering – Data rate adaptation