W9864G6GH-7 datasheet(12/43 Pages) WINBOND

Part #	W9864G6GH-7

Description	1M 횞 4 BANKS 횞 16 BITS SDRAM

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Manufacturer	WINBOND [Winbond]

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W9864G6GH

Publication Release Date:Aug. 13, 2007

- 12 -

Revision A09

8.

OPERATION MODE

Fully synchronous operations are performed to latch the commands at the positive edges of CLK.

Table 1 shows the truth table for the operation commands.

Table 1 Truth Table (note (1), (2))

Command

Device

State

CKEn-1

CKEn

DQM BS0, 1

A10

A0-A9,

A11

CS

RAS

CAS

WE

Bank Active

Idle

H

x

v

V

L

H

Bank Precharge

Any

H

x

v

L

x

L

H

L

Precharge All

Any

H

x

H

x

L

H

L

Write

Active (3)

H

x

v

L

v

L

H

L

Write with Auto-precharge

Active (3)

H

x

v

H

v

L

H

L

Read

Active (3)

H

x

v

L

v

L

H

L

H

Read with Auto-precharge

Active (3)

H

x

v

H

v

L

H

L

H

Mode Register Set

Idle

H

x

v

L

No-Operation

Any

H

x

L

H

Burst Stop

Active (4)

H

x

L

H

L

Device Deselect

Any

H

x

H

x

Auto-Refresh

Idle

H

x

L

H

Self-Refresh Entry

Idle

H

L

x

L

H

Self Refresh Exit

idle

(S.R)

L

H

x

H

L

x

H

x

H

x

Clock suspend Mode

Entry

Active

H

L

x

Power Down Mode Entry

Idle

Active (5)

H

L

x

H

L

x

H

x

H

X

H

Clock Suspend Mode Exit

Active

L

H

x

X

Power Down Mode Exit

Any

(power

down)

L

H

x

H

L

x

H

x

H

X

H

Data write/Output Enable

Active

H

x

L

x

Data write/Output Disable

Active

H

x

H

x

Notes:

(1) v = valid, x = Don't care, L = Low Level, H = High Level

(2) CKEn signal is input leve l when commands are provided.

(3) These are state of bank designated by BS0, BS1 signals.

(4) Device state is full page burst operation.

(5) Power Down Mode can not be entered in the burst cycle.

When this command asserts in the burst cycle, device state is clock suspend mode.

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