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What is an elastic buffer?
An elastic buffer is a device that helps smooth the data transfer between two similar, but unsynchronized clock domains. Ethernet nodes are not synchronous; they run off their own local oscillators–using “similar” reference frequencies.
What is elastic FIFO?
A dual clock register based elastic First-In First-Out Architecture is presented for Globally Asynchronous Locally Synchronous (GALS) Network on Chip interface. This FIFO supports arbitrary phase and frequency for read and write operations and prepares safe data transmission between different clock domains.
What is the use of synchronous FIFO?
Renesas synchronous FIFOs are typically used for synchronization of CPU and other computer hardware. FIFOs are generally implemented as a circular queue, and thus have a read and write pointer. Synchronous FIFOs use clocks for reading and writing, while asynchronous FIFOs are usually controlled by asynchronous signals.
How do you determine FIFO depth?
FIFO DEPTH = B – B *F2/(F1*10) . The depth is not dependent on read and write clock. For fifo depth you need to only calculate how many values you want to write into the fifo. The fifo depth is independent of clock frequency of both read and write.
How are elastic buffers used in clock synchronization?
Elastic Buffers (also known as Elasticity Buffers, Synchronization Buffers, and Elastic Stores) are used to ensure data integrity when bridging two different clock domains. This buffer is simply a FIFO (First-In-First-Out) where data is deposited at a certain rate based on one clock and removed at a rate derived from a different clock.
How is elastic buffer used in USB 3.0?
The post simulation results show that, the presented elastic buffer can complete SKP adding and removing function correctly, and the clock frequencies can reach 500MHz with tiny changes in area, energy consump- tion and speed of reading. It can be applied to the design and optimization of USB3.0. Keywords: USB3.0, elastic buffer, read pointer, SKP
What’s the difference between asynchronous and synchronous FIFO?
FIFO can be either synchronous or asynchronous. The basic difference between them is that the entire operation of synchronous FIFO is entirely dependent on the clock where as the write operation and read operation of asynchronous FIFO are asynchronous to each other.
What’s the difference between a FIFO and a LIFO?
FIFO (“First-In, First-Out”) assumes that the oldest products in a company’s inventory have been sold first and goes by those production costs. The LIFO (“Last-In, First-Out”) method assumes that the most recent products in a company’s inventory have been sold first and uses those costs instead. Here’s What We’ll Cover: