HY5DU12422AT Datasheet, PDF(18/33 Page) Hynix Semiconductor

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HY5DU12422AT Datasheet, PDF (18/33 Pages) Hynix Semiconductor – 512Mb DDR SDRAM

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HY5DU12422A(L)T

HY5DU12822A(L)T

HY5DU121622A(L)T

7. Issue 2 or more Auto Refresh commands.

8. Issue a Mode Register Set command to initialize the mode register with bit A8 = Low

Power-Up Sequence

VDD

VDDQ

VTT

VREF

/CLK

CLK

CKE

CMD

ADDR

A10

BA0,BA1

DQS

DQâs

tVTD

tIS tIH

NOP

PRE

EMRS

MRS

NOP

PRE

AREF

MRS

CODE

T=200usec

tRP

tMRD

200 cycles of CK*

tRP

tRFC

Power up

VDD and CK stable

EMRS Set

Precharge All

MRS Set

Reset DLL

(with A8=H)

2 or more MRS Set

Precharge All Auto Refresh (with A8=L)

*200 cycles of CK are required (for DLL locking) before any executable command can be applied.

Rev. 0.0/Feb. 2003

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