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PDF M484M1644 Data sheet ( Hoja de datos )
| Número de pieza | M484M1644 | |
| Descripción | 64Mb SDRAM | |
| Fabricantes | eorex | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de M484M1644 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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Ordering Information
64Mb SDRAM
EM 48 4M 16 4 4 V T A – 55 L
EOREX
Memory
EDO/FPM
D-RAMBUS
DDRSDRAM
DDRSGRAM
SGRAM
SDRAM
: 40
: 41
: 42
: 43
: 46
: 48
Density
16M : 16 Mega Bits
8M : 8 Mega Bits
4M : 4 Mega Bits
2M : 2 Mega Bits
1M : 1 Mega Bit
Organization
8 : x8
9 : x9
16 : x16
18 : x18
32 : x32
Refresh
1 : 1K, 8 : 8K
2 : 2K, 6 :16K
4 : 4K
Bank
2 : 2Bank 6 : 16Bank
4 : 4Bank 3 : 32Bank
8 : 8Bank
Interface
V: 3.3V
R: 2.5V
Rev.02
Power
Blank : Standard
L : Low power
I : Industrial
F: PB free package
Min Cycle Time ( Max Freq.)
-5 : 5ns ( 200MHz )
-6 : 6ns ( 167MHz )
-7 : 7ns ( 143MHz )
-75 : 7.5ns ( 133MHz )
-8 : 8ns ( 125MHz )
-10 : 10ns ( 100MHz )
Revision
A : 1st B : 2nd
C : 3rd D :4th
Package
C: CSP B: uBGA
T: TSOP Q: TQFP
P: PQFP ( QFP )
1/18
1 page  
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Block Diagram
64Mb SDRAM
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
BA0
BA1
Auto/Self
Refresh Counter
Memory
Array
Mode Register Set
S/A & I/O gating
Col. Decoder
Col. Add. Buffer
Col. Add. Counter
Burst Counter
DQM
Write DQM
Control
Data In
Data Out
Read DQM
Control
Timing Register
CLK CKE
/CS /RAS /CAS /WE DQM
DQi
Rev.02
5/18
5 Page 
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64Mb SDRAM
Current
state
Re ad w ith AP
/CS /R /C /W Addr.
HX X X
X
LHHH
X
LHHL
X
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
Command
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
HX X X
X
DESL
burst to end Write
recovering w ith auto precharge
LHHH
X
NOP
Continue burst to end Write
recovering w ith auto precharge
Write w ith AP
Pr e ch ar g in g
Row activating
LHHL
X
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
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
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
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
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.02
11/18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet M484M1644.PDF ] | |
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