Configurable storage blocks with embedded first-in first-out and last-in first-out circuitry

摘要

An integrated circuit may have configurable storage blocks. A configurable storage block may include a memory array and a control circuit. The configurable storage block may receive a mode selection command. The control circuit may determine to operate the configurable storage block in a first mode which may provide random access to the memory array or in a second mode which may provide access to the memory array in a predefined order based on the mode selection command. Thus, the configurable storage block may implement first-in first-cut modules or last-in first-out modules and variations thereof in addition to implementing memory modules with random access.

主权项

1. Memory circuitry on a programmable integrated circuit, the memory circuitry comprising:
input and output ports; a plurality of storage circuits coupled to the input and output ports, wherein each of the storage circuits has first and second access modes, wherein the first access mode provides random access to storage locations in the storage circuits, wherein the second access mode provides access to storage locations in the storage circuits in a predetermined sequence, and wherein each of the storage circuits comprises:
a memory array; anda control circuit coupled to the memory array and the input and output ports, wherein the control circuit receives a specified access mode from one of the input ports, wherein the control circuit provides access to the memory array by selecting between the first and second access modes based on the specified access mode, and wherein a cascade chain circuit is coupled between at least two storage circuits in the plurality of storage circuits.