M2V56S20TP Ver la hoja de datos (PDF) - Mitsumi
Número de pieza
componentes Descripción
Fabricante
M2V56S20TP Datasheet PDF : 49 Pages
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SDRAM (Rev.1.1)
Single Data Rate
Feb.2000
MITSUBISHI LSIs
M2V56S20/ 30/ 40/ TP -6, -7, -8
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
LL
POWER
DOWN
HX
LH
LL
ALL BANKS H H
IDLE*2
HL
HL
HL
HL
HL
HL
LX
ANY STATE H H
other than
H
L
listed above L
H
LL
/CS /RAS /CAS /WE Add
Action
X X X X X INVALID
H X X X X Exit Self-Refresh (Idle after tRC)
L H H H X Exit Self-Refresh (Idle after tRC)
L H H L X ILLEGAL
L H L X X ILLEGAL
L L X X X ILLEGAL
X X X X X NOP (Maintain Self-Refresh)
X X X X X INVALID
X X X X X Exit Power Down to Idle
X X X X X NOP (Maintain Power Down)
X X X X X Refer to Function Truth Table
L L L H X Enter Self-Refresh
H X X X X Enter Power Down
L H H H X Enter Power Down
L H H L X ILLEGAL
L H L X X ILLEGAL
L L X X X ILLEGAL
X X X X X Refer to Current State =Power Down
X X X X X Refer to Function Truth Table
X X X X X Begin CLK Suspend at Next Cycle*3
X X X X X Exit CLK Suspend at Next Cycle*3
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
11
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