Auto-activate on synchronous dynamic random access memory

Static information storage and retrieval – Addressing – Sync/clocking

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36523003, G11C 700

Patent

active

056006055

ABSTRACT:
A synchronous dynamic random access memory (SDRAM) includes a memory array and is responsive to command signals and address bits. A command decoder/controller responds to selected command signals to initiate, at different times, a precharge command, an active command, and a transfer command. The command decoder/controller initiates the active command during the precharge command. Indicating circuitry responds to the precharge command to provide a precharge complete signal indicating the completion of a precharge command operation. A row address latch responds to the active command to receive and hold a value representing a row address of the memory array as indicated by the address bits provided at the time the active command is initiated, and responds to the precharge complete signal to release the row address.

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Yasuhiro Takai, et al., "250 Mbyte/s Synchronous DRAM Using a 3-Stage pipelined Architecture", IEEE Journal of Solid-State Circuits, No. 4, pp. 426-430, (Apr. 1994).
Kazuyuki Nakamura, et al., "A 220-MHz Pipelined 16-Mb BiCMOS SRAM with PLL Proportional Self-Timing Generator", IEEE Journal of Solid-State Circuits, No. 11, pp. 1317-1321, (Nov. 1994).

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