M2S56D20AKT View Datasheet(PDF) - Elpida Memory, Inc

Part Name

Description

Manufacturer

M2S56D20AKT

256M Double Data Rate Synchronous DRAM

Elpida Memory, Inc 

DDR SDRAM

E0338M10 (Ver.1.0)

(Previous Rev.1.54E)

Jan. '03 CP(K)

M2S56D20/ 30/ 40ATP

M2S56D20/ 30/ 40AKT

256M Double Data Rate Synchronous DRAM

/CLK

CLK

Command

A0-9,11

A10

BA0,1

READ with Auto-Precharge (BL=8, CL=2,2.5)

0 1 2 3 4 5 6 7 8 9 10 11 12

ACT

READA

tRCD

Xa

Y

Xa

1

00

00

BL/2 + tRP

BL/2

tRP

CL=2

DQS

DQ

Qa0 Qa1 Qa2 Qa3 Qa4 Qa5 Qa6 Qa7

DQS

CL=2.5

DQ

Qa0 Qa1 Qa2 Qa3 Qa4 Qa5 Qa6 Qa7

Internal Precharge starting Timing

Asserted

Command

For Different Bank

3

4

5

6

7

8

9 10

READ

Legal Legal Legal Legal Legal Legal Legal Legal

READA

Legal Legal Legal Legal Legal Legal Legal Legal

WRITE(CL=2) Illegal Illegal Illegal Illegal Illegal Legal Legal Legal

WRITE(CL=2.5) Illegal Illegal Illegal Illegal Illegal Illegal Legal Legal

WRITEA(CL=2) Illegal Illegal Illegal Illegal Illegal Legal Legal Legal

WRITEA(CL=2.5) Illegal Illegal Illegal Illegal Illegal Illegal Legal Legal

ACT

Legal Legal Legal Legal Legal Legal Legal Legal

PCG

Legal Legal Legal Legal Legal Legal Legal Legal

Operating description when new command is asserted.

28

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