Memory apparatus, refresh control circuit and row hammer refresh method
AssigneeWinbond Electronics Corp.
InventorChongoh Eun
Life of this patent
Estimating the term…
Abstract
A memory apparatus, comprising: a command decoder, generating an external refresh command; a refresh skip divider, coupled to the command decoder, catching the external refresh command and outputting a divider signal; a row hammer circuit, generating a row hammer signal; and a refresh control circuit, coupled to the command decoder, the refresh skip divider and the row hammer circuit, wherein the refresh control circuit receives the external refresh command, the divider signal and the row hammer signal, and the refresh control circuit generates an internal refresh command according to the external refresh command, the divider signal and the row hammer signal.
Claims8
A memory apparatus, comprising:
- a command decoder, generating an external refresh command;
- a refresh skip divider, coupled to the command decoder, catching the external refresh command and outputting a divider signal;
- a row hammer circuit, generating a row hammer signal;
- and
- a refresh control circuit, coupled to the command decoder, the refresh skip divider and the row hammer circuit, wherein
- the refresh control circuit receives the external refresh command, the divider signal and the row hammer signal, and
- the refresh control generates an internal refresh command according to the divider signal and the row hammer signal,
- the divider signal comprising a high-voltage divider pulse and a low-voltage divider pulse, and
- in response to the refresh control circuit receiving the high-voltage divider pulse and the row hammer signal is not enabled, the refresh control circuit passes the external refresh command to generate the internal refresh command.
A row hammer refresh method, comprising:
- receiving an external refresh command, a divider signal and a row hammer signal;
- and
- generating an internal refresh command according to the divider signal and the row hammer signal, wherein:
- the divider signal comprising a high-voltage divider pulse and a low-voltage divider pulse;
- and
- in response to receiving the high-voltage divider pulse and the row hammer signal is not enabled, passing the external refresh command to generate the internal refresh command.
Dependencies are inferred from the claim text.