M2V56S20AKT-5 View Datasheet(PDF) - Mitsumi

Part Name

Description

Manufacturer

M2V56S20AKT-5

256M Synchronous DRAM

Mitsumi 

SDRAM (Rev.1.01)

Single Data Rate

July '01

MITSUBISHI LSIs

M2V56S20/ 30/ 40 AKT -5, -6, -7

256M Synchronous DRAM

FUNCTION TRUTH TABLE for CKE

CKE CKE

Current State

n-1 n

SELF-

HX

REFRESH*1 L

H

LH

LH

LH

LH

L

L

POWER

DOWN

HX

LH

L

L

ALL BANKS H H

IDLE*2

HL

HL

HL

HL

HL

HL

L

X

ANY STATE H

H

other than H L

listed above L

H

L

L

/CS /RAS /CAS /WE

X

X

X

X

H

X

X

X

L HHH

L

H

H

L

L

H

L

X

L

L

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

L

L

L

H

H

X

X

X

L HHH

L

H

H

L

L

H

L

X

L

L

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

Add

Action

X INVALID

X Exit Self-Refresh (Idle after tRC)

X Exit Self-Refresh (Idle after tRC)

X ILLEGAL

X ILLEGAL

X ILLEGAL

X NOP (Maintain Self-Refresh)

X INVALID

X Exit Power Down to Idle

X NOP (Maintain Power Down)

X Refer to Function Truth Table

X Enter Self-Refresh

X Enter Power Down

X Enter Power Down

X ILLEGAL

X ILLEGAL

X ILLEGAL

X Refer to Current State =Power Down

X Refer to Function Truth Table

X Begin CLK Suspend at Next Cycle*3

X Exit CLK Suspend at Next Cycle*3

X Maintain CLK Suspend

ABBREVIATIONS:

H=High Level, L=Low Level, X=Don't Care

NOTES:

1. CKE Low to High transition will re-enable CLK and other inputs asynchronously .

A minimum setup time must be satisfied before any command other than EXIT.

2. Self-Refresh can be entered only from the All Banks Idle State.

3. Must be legal command.

MITSUBISHI ELECTRIC

11

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