Configurable post-package repair
View Patent ↗A memory device includes a memory bank comprising a plurality of addressable groups of memory cells comprising a primary and a secondary set of addressable groups and control circuitry comprising repair address match circuitry, comprising first inputs to receive row address values corresponding to a first group of the primary set of addressable groups, second inputs to receive fused address values corresponding to a second group of the primary set of addressable groups having been repaired, and a selection element, comprising a first selection input to receive a first signal indicative of whether a first row address value is identical to a first fused address value, a second selection input to receive a second signal indicative of whether a second row address value is identical to a second fused address value, and an output to selectively transmit a result as one of the first or second signal.
1. A memory device, comprising:
a memory bank comprising a plurality of addressable groups of memory cells, wherein the plurality of addressable groups of memory cells comprises a primary set of addressable groups and a secondary set of addressable groups; and
control circuitry configured to activate an addressable group of the memory bank, the control circuitry comprising repair address match circuitry, comprising:
first inputs configured to receive row address values corresponding to a first group of the primary set of addressable groups;
second inputs configured to receive fused address values corresponding to a second group of the primary set of addressable groups having been repaired; and
a selection element, comprising:
a first selection input configured to receive a first signal indicative of whether a first row address value of the row address values is identical to a first fused address value of the fused address values;
a second selection input configured to receive a second signal indicative of whether a second row address value of the row address values is identical to a second fused address value of the fused address values; and
an output configured to selectively transmit a result as one of the first signal or the second signal.
2. The memory device of claim 1 , wherein the selection element comprises a multiplexer.
3. The memory device of claim 2 , wherein the selection element comprises a control input.
4. The memory device of claim 3 , wherein the control input is configured to receive a third signal indicative of whether a fuse is blown.
5. The memory device of claim 3 , wherein the control input is configured to receive a third signal indicative of whether a repair utilizing a portion of the secondary set of addressable groups was completed.
6. The memory device of claim 5 , wherein the selection element is configured to selectively transmit the result as one of the first signal or the second signal based upon a value of the third signal.
7. The memory device of claim 5 , wherein the selection element is configured to selectively transmit the result as the first signal when a value of the third signal is a binary high value indicative that the repair utilizing the portion of the secondary set of addressable groups was completed.
8. The memory device of claim 5 , wherein the selection element is configured to selectively transmit the result as the second signal when a value of the third signal is a binary low value indicative that the repair utilizing the portion of the secondary set of addressable groups was not completed.
9. The memory device of claim 1 , wherein the repair address match circuitry is configured to generate a match signal based at least in part on the result.
10. The memory device of claim 9 , wherein the control circuitry is configured to determine whether to repair the first group of the primary set of addressable groups based at least in part on the match signal.
11. A memory bank controller comprising:
a memory bank comprising a plurality of data rows and a plurality of post-package repair (PPR) rows;
a fuse circuit comprising a plurality of fuses configured to store indications of addresses of PPR rows utilized in place of data rows of the plurality of data rows and comprising an address match selection fuse; and
address match circuitry coupled to the fuse circuit, wherein the address match circuitry comprises:
first inputs configured to receive row address values corresponding to a first data row of the plurality of data rows;
second inputs configured to receive fused address values corresponding to a first PPR row of the plurality of PPR rows; and
a selection element, comprising:
a first selection input configured to receive a first signal indicative of whether a first row address value of the row address values is identical to a first fused address value of the fused address values;
a second selection input configured to receive a second signal indicative of whether a second row address value of the row address values is identical to a second fused address value of the fused address values; and
an output configured to selectively transmit a result as one of the first signal or the second signal.
12. The memory bank controller of claim 11 , wherein the address match selection fuse is configured to be blown when a second PPR row of the plurality of PPR rows is utilized to repair a second data row of the plurality of data rows.
13. The memory bank controller of claim 12 , wherein the selection element comprises a control input configured to receive a third signal indicative of whether the address match selection fuse is blown.
14. The memory bank controller of claim 13 , wherein the selection element is configured to selectively transmit the result as one of the first signal or the second signal based upon a binary value of the third signal.
15. The memory bank controller of claim 11 , wherein the address match circuitry is configured to generate a match signal based as part of a hard PPR of the first data row.
16. The memory bank controller of claim 11 , wherein the fuse circuit comprises a second address match selection fuse that corresponds to a second memory bank.
17. A method, comprising:
receiving row address values corresponding to a first group of a primary set of addressable groups of a memory bank;
receiving fused address values corresponding to a second group of the primary set of addressable groups of a memory bank having been repaired;
receiving a first signal indicative of whether a first row address value of the row address values is identical to a first fused address value of the fused address values;
receiving a second signal indicative of whether a second row address value of the row address values is identical to a second fused address value of the fused address values; and
selectively transmitting a result as one of the first signal or the second signal.
18. The method of claim 17 , comprising receiving a third signal indicative of whether an in-house repair utilizing a portion of a secondary set of addressable groups was completed.
19. The method of claim 18 , comprising selectively transmitting the result as one of the first signal or the second signal based upon a value of the third signal.
20. The method of claim 17 , comprising generate a match signal based at least in part on the result and determining whether to repair the first group of the primary set of addressable groups based at least in part on the match signal.