EM6A9160TSA-5G Datasheet, PDF(52/63 Page) Etron Technology, Inc.

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EM6A9160TSA-5G Datasheet, PDF (52/63 Pages) Etron Technology, Inc. – 8M x 16 DDR Synchronous DRAM (SDRAM)

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EtronTech

EM6A9160TSA

Figure 33. Initialize and Mode Register Sets

VDD

VDDQ

VTT

(system*)

VREF

tVDT>=0

tCK

tCH tCL

tIS tIH

CKE

COMMAND

tIS tIH

NOP

PRE

EMRS

MRS

PRE

MRS

ACT

A0-A9,

A11

tIS tIH

CODE

A10

BA0,BA1

ALL BANKS tIS tIH

CODE

tIS tIH

BA0=H

BA1=L

CODE

BA0=L

BA1=L

ALL BANKS

tIS tIH

CODE

BA0=L

BA1=L

DQS

High-Z

T=200Âµs

Power-up:

VDD and

CLK stable

**tMRD

tRP

tRFC

Extended mode

200 cycles of CK**

Load Mode

Reset DLL (with A8=H)

tRFC

**tMRD

Load Mode

(with A8=L)

*=VTT is not applied directly to the device, however tVTD must be greater than or equal to zero to avoid device latch-up

**=tMRD is required before any command can be applied, and 200 cycles of CK are required before any executable command can be applied

The two Auto Refresh commands may be moved to follow the first MRS but precede the second PRECHARGE ALL command

Donât Care

Etron Confidential

Rev. 1.1

Feb. 2009

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