| 摘要 |
Hidden self-refresh method and apparatus for a synchronous dynamic random access memory having at least two cell banks, each of the cell banks including a plurality of cell arrays. The hidden self-refresh apparatus comprises a first input line for inputting an external first address signal for addressing any one of the cell banks, a second input line for inputting an external second address signal for addressing any one of the cell arrays in the cell banks, a counter for generating a refresh address signal for addressing any one of the plurality of cell arrays in one of the cell banks corresponding to a logical value of the first address signal from the first input line, an address multiplexer for selecting either the refresh address signal from the counter or the second address signal from the second input line, and at least two latch circuits being individually driven according to the logical value of the first address signal from the first input line, each of the at least two latch circuits transferring the address signal selected by the address multiplexer to a corresponding one of the cell banks.
|
