AS4C64M8D2 datasheet(7/59 Pages) ALSC

7 / 59 page

AS4C64M8D2

Confidential

Rev. 1.0

Feb. /2014

Operation Mode

Table 4 shows the truth table for the operation commands.

Table 4. Truth Table (Note (1), (2))

Command

State CKEn-1 CKEn DM BA0-2 A10 A0-9, 11-13 CS# RAS# CAS# WE#

BankActivate

Idle(3)

Row address

Single Bank Precharge

Any

All Banks Precharge

Any

Write

Active(3)

Column

address

(A0 – A9)

Write with AutoPrecharge

Active(3)

Read

Active(3)

Column

address

(A0 – A9)

Read and Autoprecharge

Active(3)

(Extended) Mode Register Set

Idle

OP code

No-Operation

Any

Burst Stop

Active(4)

Device Deselect

Any

Refresh

Idle

SelfRefresh Entry

Idle

SelfRefresh Exit

Idle

Power Down Mode Entry

Idle

Power Down Mode Exit

Any

Data Input Mask Disable

Active

Data Input Mask Enable(5)

Active

NOTE 1:

V=Valid data, X=Don't Care, L=Low level, H=High level

NOTE 2:

CKEn signal is input level when commands are provided.

NOTE 3:

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

NOTE 4:

These are states of bank designated by BA signal.

NOTE 5:

Device state is 4, and 8 burst operation.

NOTE 6:

LDM and UDM can be enabled respectively.

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