M2V56S20AKT-5 View Datasheet(PDF) - MITSUBISHI ELECTRIC
Part Name
Description
Manufacturer
M2V56S20AKT-5 Datasheet PDF : 51 Pages
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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
Current State /CS /RAS /CAS /WE
IDLE
H
X
X
X
Address
X
Command
DESEL
NOP
Action
L
H
H HX
L
H
H
LX
NOP
TBST
NOP
ILLEGAL*2
L
H
L
X BA, CA, A10 READ / WRITE ILLEGAL*2
L
L
H H BA, RA
L
L
H
L BA, A10
ACT
PRE / PREA
Bank Active, Latch RA
NOP*4
L
L
L
L
ROW ACTIVE H
X
L
HX
Op-Code,
L
L Mode-Add
X
XX
REFA
MRS
DESEL
Auto-Refresh*5
Mode Register Set*5
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
WRITE /
Begin Write, Latch CA,
L
H
L
L BA, CA, A10
WRITEA
Determine Auto-Precharge
L
L
H H BA, RA
ACT
Bank Active / ILLEGAL*2
READ
L
L
L
L
L
L
H
X
L
H
L
H
H
L BA, A10
L
HX
L
L Op-Code,
Mode-Add
X
XX
H HX
H
LX
PRE / PREA
REFA
Precharge / Precharge All
ILLEGAL
MRS
ILLEGAL
DESEL
NOP
TBST
NOP (Continue Burst to END)
NOP (Continue Burst to END)
Terminate Burst
Terminate Burst, Latch CA,
L
H
L
H BA, CA, A10 READ / READA Begin New Read, Determine
Auto-Precharge*3
WRITE /
Terminate Burst, Latch CA,
L
H
L
L BA, CA, A10
WRITEA
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
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