Memory device having different burst order addressing for read and write operations
View Patent ↗A method comprising reordering a block of n-bit words output from a memory array according to information in certain address bits before outputting at least one n-bit word from a memory device and ignoring said certain address bits before inputting at least one n-bit word into said memory array. The method may additionally comprise examining at least two of the least significant bits of a column address and wherein said reordering is responsive to said examining step. Thus, for reads a specific 8 bit burst is identified by the most significant column address bits while the least significant bits CA 0 -CA 2 identify the most critical word and the read wrap sequence after the critical word. For writes, the burst is identified by the most significant column addresses with CA 0 -CA 2 being “don't care” bits assumed to be 000.
1. A method, comprising:
reordering a block of n-bit words output from a memory array according to information in certain address bits before outputting at least one n-bit word from a memory device; and
ignoring said certain address bits before inputting at least one n-bit word into said memory array.
2. The method of claim 1 additionally comprising the step of examining at least two of the least significant bits of a column address and wherein said reordering step is responsive to said examining step.
3. A method for addressing data in a memory device having a memory array, comprising:
reordering a block of n-bit words output from said memory array according to information in certain address bits and outputting at least one of said reordered n-bit words from said memory device; and
ignoring said certain address bits before inputting at least one n-bit word into said memory array.
4. The method of claim 3 additionally comprising the step of examining at least two of the least significant bits of a column address and wherein said reordering step is responsive to said examining step.
5. The method of claim 3 wherein said reordering a block of n-bit words comprises:
retrieving one or more data words from said memory array;
identifying a burst order, said burst order defined by said certain address bits, and
outputting said one or more data words from said memory array according to said identified burst order.
6. The method of claim 3 wherein said ignoring said certain address bits comprises:
receiving one or more data words; and
writing said one or more data words into said memory array in the same order of receipt.