HB52R329E22-F Datasheet, PDF (31/66 Pages) Elpida Memory – 256 MB Registered SDRAM DIMM 32-Mword × 72-bit, 100 MHz Memory Bus, 2-Bank Module (36 pcs of 16 M × 4 Components) PC100 SDRAM

HB52R329E22-F
From READ with AUTO-PRECHARGE state, command operation
To [DESL], [NOP]: These commands continue read operations until the burst operation is completed, and the
SDRAM module then enters precharge mode.
To [ACTV]: This command makes other banks bank active. (However, an interval of t_RRD is required.)
Attempting to make the currently active bank active results in an illegal command.
From WRITE state, command operation
To [DESL], [NOP]: These commands continue write operations until the burst operation is completed.
To [BST]: This command stops a full-page burst.
To [READ], [READ A]: These commands stop a burst and start a read cycle.
To [WRIT], [WRIT A]: These commands stop a burst and start the next write cycle.
To [ACTV]: This command makes the other bank active. (However, an interval of t_RRD is required.)
Attempting to make the currently active bank active results in an illegal command.
To [PRE], [PALL]: These commands stop burst write and the SDRAM module then enters precharge mode.
From WRITE with AUTO-PRECHARGE state, command operation
To [DESL], [NOP]: These commands continue write operations until the burst is completed, and the SDRAM
module enters precharge mode.
To [ACTV]: This command makes the other bank active. (However, an interval of t_RRD is required.)
Attempting to make the currently active bank active results in an illegal command.
From REFRESH state, command operation
To [DESL], [NOP], [BST]: After an auto-refresh cycle (after t_RC), the SDRAM module automatically enters
the IDLE state.
Data Sheet No. E0112H10
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