V58C2128 datasheet(13/59 Pages) MOSEL

13 / 59 page

MOSEL VITELIC

V58C2128(804/404/164)S

V58C2128(804/404/164)S Rev. 1.6 March 2002

Auto Precharge Operation

The Auto Precharge operation can be issued by having column address A

10 high when a Read or Write

command is issued. If A

10 is low when a Read or Write command is issued, then normal Read or Write burst

operation is executed and the bank remains active at the completion of the burst sequence. When the Auto

Precharge command is activated, the active bank automatically begins to precharge at the earliest possible

moment during the Read or Write cycle once t

RAS(min) is satisfied.

Read with Auto Precharge

If a Read with Auto Precharge command is initiated, the DDR SDRAM will enter the precharge operation

N-clock cycles measured from the last data of the burst read cycle where N is equal to the CAS latency pro-

grammed into the device. Once the autoprecharge operation has begun, the bank cannot be reactivated until

the minimum precharge time (tRP) has been satisfied.

Read with Autoprecharge Timing

(CAS Latency = 2; Burst Length = 4)

Begin Autoprecharge

ACT

R w/AP

NOP

CK, CK

Command

DQS

tRAS(min)

tP(min)

Earliest Bank A reactivate

V58C2128 Datasheet(PDF) 13 Page - Mosel Vitelic, Corp