EM68932DVKB datasheet(37/40 Pages) ETRON

部件名	EM68932DVKB

功能描述	4M x 32 Mobile DDR Synchronous DRAM (SDRAM)

PDF	40 Pages

Scroll/Zoom	100%

制造商	ETRON [Etron Technology, Inc.]

网页	http://www.etron.com

标志

37 / 40 page

EtronTech

EM68932DVKB

Etron Confidential

Rev. 1.0

Aug. 2009

Figure 31. Interrupting Write to Precharge

WRITE

NOP

PRE

NOP

BA, Col b

BA a

(or all)

DQS

(1) DI b = Data In to column b.

(2) An interrupted burst of 4 or 8 is shown, 2 data elements are written.

(3) tWTR is referenced from the positive clock edge after the last desired Data in pair.

(4) A10 is LOW with the WRITE command (Auto Precharge is disabled)

(5) *1 = can be Don’t Care for programmed burst length of 4

(6) *2 = for programmed burst length of 4, DQS becomes Don’t Care at this point

DI b

tDQSS max

Command

Address

tWR

Don’t Care

Figure 32. Precharge Command

(High)

Don’t Care

A0-A9

A11

A10

CKE

RAS

CAS

BA0,1

BA = Bank Address

(if A10 = L, otherwise Don’t Care)

All Banks

One Bank

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