M2V56S20TP Ver la hoja de datos (PDF) - Mitsumi
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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
Current State /CS /RAS /CAS /WE Address
IDLE
H
X
X
XX
L
H
H
HX
L
H
H
LX
L
H
L
X BA, CA, A10
L
L
H
H BA, RA
L
L
H
L BA, A10
L
L
L
HX
Op-Code,
L
L
L
L Mode-Add
Command
Action
DESEL NOP
NOP
NOP
TBST
ILLEGAL*2
READ / WRITE ILLEGAL*2
ACT
Bank Active, Latch RA
PRE / PREA NOP*4
REFA
Auto-Refresh*5
MRS
Mode Register Set*5
ROW ACTIVE H
X
X
XX
DESEL NOP
L
H
H
HX
NOP
NOP
L
H
H
LX
TBST
NOP
Begin Read, Latch CA,
L
H
L
H BA, CA, A10 READ / READA
Determine Auto-Precharge
L
H
L
L BA, CA, A10
WRITE /
WRITEA
Begin Write, Latch CA,
Determine Auto-Precharge
L
L
H
H BA, RA
ACT
Bank Active / ILLEGAL*2
L
L
H
L BA, A10
PRE / PREA Precharge / Precharge All
L
L
L
HX
REFA
ILLEGAL
Op-Code,
L
L
L
L
Mode-Add
MRS
ILLEGAL
READ
H
X
X
XX
DESEL NOP (Continue Burst to END)
L
H
H
HX
NOP
NOP (Continue Burst to END)
L
H
H
LX
TBST
Terminate Burst
Terminate Burst, Latch CA,
L
H
L
H BA, CA, A10 READ / READA Begin New Read, Determine
Auto-Precharge*3
L
H
L
L BA, CA, A10
WRITE /
WRITEA
Terminate Burst, Latch CA,
Begin Write, Determine Auto-
Precharge*3
L
L
H
H BA, RA
ACT
Bank Active / ILLEGAL*2
L
L
H
L BA, A10
PRE / PREA Terminate Burst, Precharge
L
L
L
HX
REFA
ILLEGAL
Op-Code,
L
L
L
L
Mode-Add
MRS
ILLEGAL
MITSUBISHI ELECTRIC
7
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