M2V28S20TP View Datasheet(PDF) - Mitsumi
Part Name
Description
Manufacturer
M2V28S20TP Datasheet PDF : 52 Pages
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SDRAM (Rev. 1.0E)
Jun. '99
MITSUBISHI LSIs
M2V28S20TP-6,-7,-8
M2V28S30TP-6,-7,-7L,-8,-8L
M2V28S40TP-7,-7L,-8,-8L
128M Synchronous DRAM
(4-BANK x 8,388,608-WORD x 4-BIT)
(4-BANK x 4,194,304-WORD x 8-BIT)
(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
L
H
/CS /RAS /CAS /WE
XXXX
HX XX
Add Action
X INVALID
X Exit Self-Refresh (Idle after tRC)
L
HL
H H H X Exit Self-Refresh (Idle after tRC)
L
HL
HHL
X ILLEGAL
L
HL
H
L
X
X ILLEGAL
L
HL
L
XX
X ILLEGAL
L
LXX
XX
X NOP (Maintain Self-Refresh)
POWER
DOWN
H X X X X X X INVALID
L
HX X
XX
X Exit Power Down to Idle
L
LXX
XX
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
XXX
XX
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
HX X
XX
X Exit CLK Suspend at Next Cycle*3
L
LXX
XX
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
14
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