M2S56D20AKT Просмотр технического описания (PDF) - Elpida Memory, Inc
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M2S56D20AKT Datasheet PDF : 41 Pages
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DDR SDRAM
E0338M10 (Ver.1.0)
(Previous Rev.1.54E)
Jan. '03 CP(K)
M2S56D20/ 30/ 40ATP
M2S56D20/ 30/ 40AKT
256M Double Data Rate Synchronous DRAM
FUNCTION TRUTH TABLE (2/4)
Current State /CS /RAS /CAS /WE Address
WRITE(Auto- H X X X X
Precharge L H H H X
Disabled) L H H L BA
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L HX
LL
L
L
Op-Code,
Mode-Add
READ with H X X X X
Auto-
L H H HX
Precharge L H H L BA
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L HX
LL
L
L
Op-Code,
Mode-Add
WRITE with H X X X X
Auto-
L H H HX
Precharge L H H L BA
L H L H BA, CA, A10
L H L L BA, CA, A10
L L H H BA, RA
L L H L BA, A10
L L L HX
LL
L
L
Op-Code,
Mode-Add
Command
DESEL
NOP
TERM
READ / READA
WRITE / WRITEA
ACT
PRE / PREA
REFA
Action
NOP (Continue Burst to END)
NOP (Continue Burst to END)
ILLEGAL
Terminate Burst, Latch CA, Begin
Read, Determine Auto-Precharge
Terminate Burst, Latch CA, Begin
Write, Determine Auto-Precharge
Bank Active / ILLEGAL
Terminate Burst, Precharge
ILLEGAL
Notes
3
3
2
MRS
ILLEGAL
DESEL
NOP (Continue Burst to END)
NOP
NOP (Continue Burst to END)
TERM
ILLEGAL
READ / READA ILLEGAL for Same Bank
6
WRITE / WRITEA ILLEGAL for Same Bank
6
ACT
Bank Active / ILLEGAL
2
PRE / PREA
Precharge / ILLEGAL
2
REFA
ILLEGAL
MRS
ILLEGAL
DESEL
NOP (Continue Burst to END)
NOP
NOP (Continue Burst to END)
TERM
ILLEGAL
READ / READA ILLEGAL for Same Bank
7
WRITE / WRITEA ILLEGAL for Same Bank
7
ACT
Bank Active / ILLEGAL
2
PRE / PREA
Precharge / ILLEGAL
2
REFA
ILLEGAL
MRS
ILLEGAL
10
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