M2V56S20AKT-5 View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M2V56S20AKT-5

256M Synchronous DRAM

MITSUBISHI ELECTRIC  

SDRAM (Rev.1.31)

Single Data Rate

Apr. '02

MITSUBISHI LSIs

M2V56S20/ 30/ 40 ATP

M2V56S20/ 30/ 40 AKT

256M Synchronous DRAM

FUNCTION TRUTH TABLE for CKE

Current State CKE CKE /CS /RAS /CAS /WE Add

n-1 n

Action

SELF-

H X X X X X X INVALID

REFRESH*1 L H H X X X X Exit Self-Refresh (Idle after tRFC)

L H L H H H X Exit Self-Refresh (Idle after tRFC)

L H L H H L X ILLEGAL

L H L H L X X ILLEGAL

L H L L X X X ILLEGAL

L L X X X X X NOP (Maintain Self-Refresh)

POWER

DOWN

H X X X X X X INVALID

L H X X X X X Exit Power Down to Idle

L L X X X X X NOP (Maintain Power Down)

ALL BANKS H H X X X X X Refer to Function Truth Table

IDLE*2

HL

L

L

L

H X Enter Self-Refresh

H L H X X X X Enter Power Down

HL

L

H H H X Enter Power Down

HL

L

HH

L

X ILLEGAL

HL

L

H

L

X X ILLEGAL

HL

L

L

X

X X ILLEGAL

L X X X X X X Refer to Current State =Power Down

ANY STATE H H X X X X X Refer to Function Truth Table

other than H L X X X X X Begin CLK Suspend at Next Cycle*3

listed above L

H

X

X

X

X

X Exit CLK Suspend at Next Cycle*3

L L X X X X 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

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