| abstract |
The present application relates to apparatus, systems and methods for refresh mode. The memory may need to perform a target refresh operation to refresh 'victim' word lines close to frequently accessed 'aggressor' word lines. In order to refresh victims at a high enough rate, multiple victims may need to be refreshed as part of the same refresh operation. However, some word lines (eg, word lines in the same segment or adjacent segments of the memory) cannot be refreshed together. The memory can have a sector comparator that can check stored aggressor addresses and can provide a signal in the absence of two stored addresses that can be refreshed together. Based in part on the signal, the memory may activate one of several different refresh modes, which may control the type of refresh operation performed in response to the refresh signal. |