72V82L15PA

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Logic - FIFOs Memory

FIFO (First-In First-Out) memory is a type of memory that stores data in a ‘First Come-First Serve’ fashion. It stores data in a linear manner. Data is entered in the FIFO memory in the form of bytes, and is retrieved in the same order.

The 72V82L15PA FIFO is a 16-bit asynchronous FIFO memory device that provides flexible memory control and address generation capabilities. It is a single 16-bit device that provides three independent pointers, an address counter, and two separate data storage paths to facilitate efficient data movement from one signaling domain to another.

The primary application for the 72V82L15PA is to provide an interface between a bus master (master address generator) and an asynchronous bus. This makes it an ideal choice for interfacing between a processor with an asynchronous bus and external devices with a synchronous bus, such as an FPGA, for example. The 72V82L15PA supports two separate address and data storage paths, which allows different write and read operations to be performed in parallel with one another.

With regard to the working principle, the 72V82L15PA FIFO has two separate sources of control, the bus master (Master Address Generator) and the asynchronous bus, both of which provide control signals to the FIFO. The bus master sends addresses to the FIFO, while the asynchronous bus provides the data. The FIFO then converts the addresses into ‘pointers’ (in the form of binary codes) and stores the data in consecutive bytes. When the bus master reads data from the FIFO, it reads the data in the order it was entered. This ensures that data is retrieved in its original form.

The 72V82L15PA FIFO is also capable of autonomously transferring data from one domain to another without any intervention from the bus master. This autonomous transfer takes place when the FIFO is commanded to switch from write-to-read mode by the bus master. The 72V82L15PA FIFO has the ability to be retimed on both the asynchronous and synchronous data paths, thereby allowing for efficient data transfer in both directions.

In summary, the 72V82L15PA FIFO is a 16-bit asynchronous FIFO memory device that provides a flexible memory control and address generation capability. It is ideal for interfacing between a processor with an asynchronous bus and external devices with a synchronous bus. The 72V82L15PA FIFO has two separate data and address storage paths, and is capable of autonomously transferring data between domains, as well as being retimed to facilitate efficient data transfer.

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