Column address decoding
View Patent ↗Methods, memories and systems to access a memory may include generating an address during a first time period, decoding the address during the first time period, and selecting one or more cells of a buffer coupled to a memory array based, at least in part, on the decoded address, during a second time period.
1. An electronic system comprising:
supervisory circuitry to generate a memory access; and
at least one memory coupled to the supervisory circuitry, the at least one memory comprising:
an even buffer to temporarily store data from an even memory array;
an odd buffer, separate and distinct from the even buffer, to temporarily store data from an odd memory array;
a clock circuit to generate alternating even clock periods and odd clock periods;
an address circuit to generate an even address that changes in the even clock periods and an odd address that changes in the odd clock periods;
even decode circuitry to decode the even address;
odd decode circuitry, separate and distinct from the even decode circuitry, to decode the odd address;
even selection circuitry to select one or more cells of the even buffer during the odd clock periods based, at least in part, on the decoded even address to access the temporarily stored data in the even buffer;
odd selection circuitry, separate and distinct from the even selection circuitry, to select one or more cells of the odd buffer during the even clock periods based, at least in part, on the decoded odd address to access the temporarily stored data in the odd buffer;
even remap circuitry coupled between the address circuit and the even decode circuit; and
odd remap circuitry, separate and distinct from the even buffer, coupled between the address circuit and the odd decode circuit;
wherein the odd address is already provided at an output of the address circuit at a start of the odd clock period to be decoded during the odd clock period after the data for the even address is latched into the even buffer.
2. The electronic system of claim 1 , further comprising; I/O circuitry, coupled to the supervisory circuitry, to communicate with an external device.
3. The electronic system of claim 1 , wherein the electronic system comprises a solid state drive.
4. The electronic system of claim 1 , wherein the even decode circuit and the odd decode circuit both comprise two or more ‘n’ to 2n decoder circuits, wherein a ‘n’ to 2n decoder circuit is coupled to a subset of ‘n’ address lines of the respective group of address lines and drives a set of 2n respective select lines; and
wherein the even selection circuit and the odd selection circuit both comprise logic coupled to at least a single line of a first set of 2n select lines and a single line of a second set of 2n select lines to select the one or more cells of the respective buffer.
5. The electronic system of claim 1 , comprise the even remap circuitry includes a first content addressable memory and the odd remap circuitry includes a second content addressable memory.