Programmable logic device incorporating function blocks operable as wide-shallow RAM

Claim 1

An integrated circuit, comprising: a programmable function block; a plurality of configurable memory array blocks, wherein each of said configurable memory array blocks includes, at least one configurable memory array that can be configured to store a variable length data word, wherein each of said configurable memory arrays includes, a plurality of memory cells suitable for storing a data word, wherein certain ones of said plurality of memory cells can be configurably arranged in a row-wise manner forming thereby a row of memory cells having an associated variable row length based upon a particular data word length of a particular data word to be stored in the memory array, wherein said row width being set by said programmable function block to accommodate said variable length data word; a plurality of direct connectors between the plurality of configurable memory array blocks; and a control circuit for providing control signals, said control circuit characterizes said data to be stored and based upon said characterization provides signals to said plurality of configurable memory array blocks, said signals direct selected ones of said plurality of configurable memory array blocks to configure their respective memory arrays so as to store said characterized data, and wherein said signals direct selected one or more of said direct connectors to directly connect at least two selected ones of said plurality of configurable memory array blocks so as to store said characterized data when a single configurable memory array block could not store said characterized data.

Claim 11

A method of configurably storing data in a programmable logic device, said programmable logic device includes a multi-function functional block having a plurality of operation modes, configurable memory array blocks each having an array of memory cells suitable for storing data configurably arranged in a row-like fashion to form a row of memory cells and configurably arranged in a column-wise fashion to form a column of memory cells included in said multi-function functional block, a plurality of input and output lines, and direct connection devices that allow configurable memory array blocks included in said multi-function functional block to be directly connected, said method comprising: receiving a plurality of variable length data words on selected ones of said input lines; characterizing each of said plurality of variable length data words; configuring based upon said characterizing, as needed, said configurable memory array blocks included in said multi-function functional block so as to efficiently store said plurality of variable length data words in said configured configurable memory array blocks, wherein said direct connection devices directly connect selected configurable memory array blocks such that said multi-function functional block can efficiently store said plurality of data words that have data word lengths that can not be stored in a single one of said configurable memory array blocks; and outputting on selected ones of said output lines selected ones of said plurality of data words of variable length as required.

Claim 12

A method of configurably storing data in a programmable logic device, said programmable logic device includes a multi-function functional block having a plurality of operation modes, configurable memory array blocks each having an array of memory cells suitable for storing data configurably arranged in a row-like fashion to form a row of memory cells and configurably arranged in a column-wise fashion to form a column of memory cells included in said multi-function functional block, a plurality of input and output lines, and direct connection devices that allow configurable memory array blocks included in said multi-function functional block to be directly connected, said method comprising: receiving a plurality of variable length data words on selected ones of said input lines; characterizing each of said plurality of variable length data words; configuring based upon said characterizing, as needed, said configurable memory array blocks included in said multi-function functional block so as to efficiently store said plurality of variable length data words in said configured configurable memory array blocks, wherein said direct connection devices directly connect selected configurable memory array blocks such that said multi-function functional block can efficiently store said plurality of data words that have data word lengths that can not be stored in a single one of said configurable memory array blocks; and outputting on selected ones of said output lines selected ones of said plurality of data words of variable length as required.