Apparatuses and methods for multiple row hammer refresh address sequences

A method comprising:

• determining when a current address is an aggressor address, wherein the aggressor address corresponds to an aggressor wordline of a memory;
• generating a first refresh address corresponding to a first wordline of the memory, wherein the first wordline has a first physical relationship to the current aggressor wordline;
• generating a second refresh address corresponding to a second wordline of the memory, wherein the second wordline has a second physical relationship to the current aggressor wordline;
• refreshing the first wordline at a first rate;
• and
• refreshing the second wordline at a second rate, wherein determining a current address is an aggressor address comprises sampling addresses and comparing the current address to the sampled addresses, and wherein the sampling addresses occur in response to a signal from an internal oscillator.

An apparatus comprising:

• an address hammer detector configured to determine when a current address is an aggressor address, wherein the aggressor address corresponds to an aggressor wordline of a memory;
• a refresh address generator configured to provide a first refresh address corresponding to a first wordline of the memory at a first rate, wherein the first wordline has a first physical relationship to the aggressor wordline, and configured to provide a second refresh address corresponding to a second wordline of the memory at a second rate, wherein the second wordline has a second physical relationship to the aggressor wordline, wherein the first wordline is adjacent to the aggressor wordline, and wherein the second wordline is further from the aggressor wordline than the first wordline;
• and
• a row decoder configured to refresh the first or the second wordline based on receiving the first or the second refresh address.

An apparatus comprising:

• a command address input circuit configured to provide a current address;
• a refresh control circuit configured to determine when the current address is an aggressor address associated with an aggressor word line and provide a refresh address associated with a refresh wordline based on the aggressor address, wherein the refresh wordline has a first physical relationship with the aggressor address or a second physical relationship with the aggressor address, and wherein the refresh control circuit is configured to provide the refresh address associated with the refresh wordline with the first physical relationship at a first rate and configured to provide the refresh address associated with the refresh wordline with the second physical relationship at a second rate, wherein the refresh wordline with the first physical relationship is adjacent to the aggressor wordline, and wherein the refresh wordline with the second physical relationship is not adjacent to the aggressor wordline;
• and
• a row decoder configured to refresh the refresh wordline based on the refresh address.