AS4C4M16D1A-5TCN datasheet(7/54 Pages) ALSC

Part #	AS4C4M16D1A-5TCN

Description	Internal pipeline architecture

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Manufacturer	ALSC [Alliance Semiconductor Corporation]

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Operation Mode

Table 3 shows the truth table for the operation commands.

Table 3. Truth Table (Note (1), (2))

Command

State

CKEn-1 CKEn

DM BA0,1 A10

A0-9,11

CS RAS CAS WE

BankActivate

Idle(3)

H

X

V

Row address

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

Column

address

(A0 ~ A7)

L

H

L

Write and AutoPrecharge

Active(3)

H

X

V

H

L

H

L

Read

Active(3)

H

X

V

L

Column

address

(A0 ~ A7)

L

H

L

H

Read and Autoprecharge

Active(3)

H

X

V

H

L

H

L

H

(Extended)Mode Register Set

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

Precharge Power Down Mode

Entry

Idle

H

L

X

H

X

L

H

Precharge Power Down Mode

Exit

Any

L

H

X

H

X

(PowerDown)

L

H

Active Power Down Mode

Entry

Active

H

L

X

H

X

L

V

Active Power Down Mode Exit

Any

L

H

X

H

X

(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 BA signal.

4. Device state is 2, 4, 8, burst operation.

5. LDM and UDM can be enabled respectively.

4Mx16 DDR1-AS4C4M16D1A

Confidential

- 7/54 -

Rev.1.1

July 2015

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