M2S28D20ATP Просмотр технического описания (PDF) - Mitsumi
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M2S28D20ATP Datasheet PDF : 36 Pages
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DDR SDRAM (Rev.0.1)
Jun,'00 Preliminary
MITSUBISHI LSIs
M2S28D20/ 30/ 40ATP
128M Double Data Rate Synchronous DRAM
FUNCTION TRUTH TABLE
Current State /CS /RAS /CAS /WE Address
Command
IDLE
H X X XX
DESEL
L H H HX
NOP
L H H L BA
TERM
L H L X BA, CA, A10 READ / WRITE
L L H H BA, RA
ACT
L L H L BA, A10
PRE / PREA
L L L HX
REFA
L L L L Op-Code, Mode- MRS
Add
ROW ACTIVE H X X X X
DESEL
L H H HX
NOP
L H H L BA
TERM
L H L H BA, CA, A10 READ / READA
LH
LL
LL
LL
LL
READ(Auto- H X
Precharge L H
Disabled) L H
L L BA, CA, A10 WRITE / WRITEA
H H BA, RA
ACT
H L BA, A10
PRE / PREA
L HX
REFA
L L Op-Code, Mode- MRS
Add
X XX
DESEL
H HX
NOP
H L BA
TERM
L H L H BA, CA, A10 READ / READA
L H L L BA, CA, A10 WRITE / WRITEA
L L H H BA, RA
ACT
L L H L BA, A10
PRE / PREA
L L L HX
REFA
Op-Code, Mode-
L L L L Add
MRS
Action
NOP
NOP
ILLEGAL
ILLEGAL
Bank Active, Latch RA
NOP
Auto-Refresh
Mode Register Set
NOP
NOP
NOP
Begin Read, Latch CA, Determine
Auto-Precharge
Begin Write, Latch CA, Determine
Auto-Precharge
Bank Active / ILLEGAL
Precharge / Precharge All
ILLEGAL
ILLEGAL
NOP (Continue Burst to END)
NOP (Continue Burst to END)
Terminate Burst
Terminate Burst, Latch CA, Begin
New Read, Determine Auto-
Precharge
ILLEGAL
Bank Active / ILLEGAL
Terminate Burst, Precharge
ILLEGAL
ILLEGAL
Notes
2
2
4
5
5
2
3
2
MITSUBISHI ELECTRIC
7
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