EM6A9160TS-3.3G datasheet(6/29 Pages) ETRON

Part #	EM6A9160TS-3.3G

Description	8M x 16 DDR Synchronous DRAM (SDRAM)

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Manufacturer	ETRON [Etron Technology, Inc.]

Direct Link	http://www.etron.com

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EtronTech

8Mx16 DDR SDRAM

EM6A9160

6

Rev. 1.4

May 2006

Operation Mode

Fully synchronous operations are performed to latch the commands at the positive edges of CK. Table 2

shows the truth table for the operation commands.

Table 2. Truth Table (Note (1), (2) )

Command

State

CKEn-1 CKEn UDM UDM BS0,1 A10 A0-9,11 /CS /RAS /CAS /WE

BankActivate

Idle(3)

H

X

V

Row address L

L

H

BankPrecharge

Any

H

X

V

L

X

L

H

L

PrechargeAll

Any

H

X

H

X

L

H

L

Write

Active(3)

H

X

V

L

H

L

Write and AutoPrecharge

Active(3)

H

X

V

H

Column

address

(A0 ~ A8)

L

H

L

Read

Active(3)

H

X

V

L

H

L

H

Read and Autoprecharge

Active(3)

H

X

V

H

Column

address

(A0 ~ A8)

L

H

L

H

Mode Register Set

Idle

H

X

OP code

L

Extended MRS

Idle

H

X

OP code

L

No-Operation

Any

H

X

L

H

Burst Stop

Active(4)

H

X

L

H

L

Device Deselect

Any

H

X

H

X

AutoRefresh

Idle

H

X

L

H

SelfRefresh Entry

Idle

H

L

X

L

H

SelfRefresh Exit

Idle

L

H

X

H

X

(SelfRefresh)

L

H

Idle

H

L

X

H

X

Precharge Power Down Mode

Entry

L

H

Any

L

H

X

H

X

Precharge Power Down Mode

Exit

(PowerDown)

L

H

Active

H

L

X

H

X

Active Power Down Mode

Entry

L

V

Any

L

H

X

H

X

Active Power Down Mode Exit

(PowerDown)

L

H

Data Input Mask Disable

Active

H

X

L

X

Data Input Mask Enable(5)

Active

H

X

H

X

Note: 1. V=Valid data, X=Don't Care, L=Low level, H=High level

2. CKEn signal is input level when commands are provided.

CKEn-1 signal is input level one clock cycle before the commands are provided.

3. These are states of bank designated by BS signal.

4. Device state is 1, 2, 4, 8, and full page burst operation.

5. LDM and UDM can be enable respectively.

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