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US 6,608,795 B2Granted
Semiconductor device including memory with reduced current consumption
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKazutami Arimoto, Hiroki Shimano
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Abstract
When a row active command ACT_CMD is externally input, an internal clock control circuit activates a signal int.CKE, so that an external clock signal ext.CLK is responsively supplied to an internal memory array as signal int.CLK. Thus, clock control is meticulously conducted, whereby a system LSI with reduced current consumption in the memory array can be realized.
Claims1
A semiconductor device, comprising:
- a plurality of memory banks capable of designating a different row address, each of said memory banks including a plurality of memory cells arranged in rows and columns, and conducting data transmission and reception in synchronization with a clock signal;
- and
- a plurality of row address processing circuits provided corresponding to the respective memory banks, said row address processing circuits being responsive to said clock signal for accepting and holding a row address signal applied in order to specify a row of said memory cells, wherein
- each of said row address processing circuits includes
- a flip-flop circuit for accepting said row address signal in response to said clock signal, and
- a clock supply circuit for discontinuing supply of said clock signal to said flip-flop circuit after the corresponding memory bank is selected and said row address signal is accepted in said flip-flop circuit.
3 more elements
Dependencies are inferred from the claim text.