M2V28S20ATP Datasheet, PDF (13/51 Pages) Mitsubishi Electric Semiconductor – 128M Synchronous DRAM

SDRAM (Rev. 1.0E)
Nov. '99
MITSUBISHI LSIs
128M Synchronous DRAM
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L ^{(4-BANK x 8,388,608-WORD x 4-BIT)}
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L ^{(4-BANK x 4,194,304-WORD x 8-BIT)}
M2V28S40ATP -6,-6L,-7,-7L,-8,-8L (4-BANK x 2,097,152-WORD x 16-BIT)
FUNCTION TRUTH TABLE for CKE
Current State
SELF-
REFRESH*1
CKE
n-1
H
CKE
n
X
LH
/CS /RAS /CAS /WE
XXXX
HX XX
Add Action
X INVALID
X Exit Self-Refresh (Idle after tRC)
L H L H H H X Exit Self-Refresh (Idle after tRC)
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
H
L
L
L
L
H
X Enter Self-Refresh
H L H X X X X Enter Power Down
H L L H H H X Enter Power Down
H
L
L
H
H
L
X ILLEGAL
H L L H L X X ILLEGAL
H
L
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. Power-Down and Self-Refresh can be entered only from the All Banks Idle State.
3. Must be legal command.
MITSUBISHI ELECTRIC
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