EM481M1622VTA Datasheet, PDF (11/18 Pages) List of Unclassifed Manufacturers – 16Mb ( 2Banks ) Synchronous DRAM

16Mb SDRAM
Current
state
Re ad w ith AP
/CS /R
HX
LH
LH
LH
LH
LL
LL
LL
LL
/C /W Addr.
XX
X
HH
X
HL
X
L H BA/CA/A10
L L BA/CA/A10
H H BA/RA
H L BA, A10
LH
X
L L Op-Code
HX X X
X
Command
DESL
NOP
BST
REA D/REA DA
WRIT/WRITA
A CT
PRE/PA LL
REF/SELF
MRS
DESL
LHHH
X
LHHL
X
Write w ith AP 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
LL L H
X
L L L L Op-Code
HX X X
X
LHHH
X
LHHL
X
L H L H BA/CA/A10
Pre charging L H L L BA/CA/A10
L L H H BA/RA
L L H L BA, A10
LL L H
X
L L L L Op-Code
HX X X
X
LHHH
X
LHHL
X
L H L H BA/CA/A10
Row activating L H L L BA/CA/A10
L L H H BA/RA
L L H L BA, A10
LL L H
X
L L L L Op-Code
NOP
BST
REA D/REA DA
WRIT/WRITA
A CT
PRE/PA LL
REF/SELF
MRS
DESL
NOP
BST
REA D/REA DA
WRIT/WRITA
A CT
PRE/PA LL
REF/SELF
MRS
DESL
NOP
BST
REA D/REA DA
WRIT/WRITA
A CT
PRE/PA LL
REF/SELF
MRS
Action
Continue burst to end → Precharging
Continue burst to end → Precharging
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
burst to end → Write
recovering w ith auto precharge
Continue burst to end → Write
recovering w ith auto precharge
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
Nop → Enter idle af ter tRP
Nop → Enter idle af ter tRP
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
Nop → Enter idle af ter tRP
ILLEGA L
ILLEGA L
Nop → Enter idle af ter tRCD
Nop → Enter idle af ter tRCD
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
ILLEGA L
Re m ark H = High level, L = Low level, X = High or Low level (Don't care), AP = Auto Precharge
Notes
3
3
3
3
3
3
3
3
3
3
3
3
3
3,10
3
Rev.01
11/18