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PDF EM42AM1684RTC Data sheet ( Hoja de datos )

Número de pieza EM42AM1684RTC
Descripción Double DATA RATE SDRAM
Fabricantes Eorex 
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No Preview Available ! EM42AM1684RTC Hoja de datos, Descripción, Manual

Revision History
Revision 0.1 (Jul. 2010)
- First release.
Revision 0.2 (Sep. 2010)
- Delete CL=2, page 2, 8, 17
- Add [email protected]; 200MHz@3-3-3, page 2
EM42AM1684RTC
Sep. 2010
www.eorex.com
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EM42AM1684RTC pdf
Absolute Maximum Rating
EM42AM1684RTC
Symbol
Item
Rating
Units
VIN, VOUT
VDD, VDDQ
TOP
TSTG
PD
IOS
Input, Output Voltage
Power Supply Voltage
Operating Temperature Range
Storage Temperature Range
Power Dissipation
Short Circuit Current
-0.3 ~ +3.6
-0.3 ~ +3.6
Commercial
Extended
0 ~ +70
-25 ~ +85
-55 ~ +150
1.6
50
V
V
°C
°C
W
mA
Note: Caution Exposing the device to stress above those listed in Absolute Maximum Ratings could
cause permanent damage. The device is not meant to be operated under conditions outside
the limits described in the operational section of this specification. Exposure to Absolute
Maximum Rating conditions for extended periods may affect device reliability.
Capacitance (VCC=2.5V, f=1MHz, TA=25°C)
Symbol
Parameter
Min. Typ. Max. Units
CCLK
Clock Capacitance(CLK,/CLK)
2.0 - 3.0 pF
CI
Input Capacitance for CKE, Address, /CS,
/RAS, /CAS, /WE
2.0
-
3.0 pF
CO DM & DQS Input/Output Capacitance 4.0 - 5.0 pF
Recommended DC Operating Conditions (TA=-0°C ~+70°C)
Symbol
VDD
VDDQ
VREF
VTT
VIH
VIL
Parameter
Power Supply Voltage
Power Supply Voltage (for I/O Buffer)
I/O Logic high Voltage
I/O Termination Voltage
Input Logic High Voltage
Input Logic Low Voltage
Min. Typ. Max. Units
2.3
2.3
0.49*VDDQ
VREF-0.04
VREF+0.15
-0.3
2.5
2.5
0.5*VDDQ
-
-
-
2.7
2.7
0.51*VDDQ
VREF+0.04
VDDQ+0.3
VREF-0.15
V
V
V
V
V
V
Sep. 2010
www.eorex.com
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EM42AM1684RTC arduino
1. Command Truth Table
EM42AM1684RTC
Command
CKE
BA0,
Symbol n-
/CS /RAS /CAS /WE
A10 A12~A0
N BA1
1
Ignore Command DESL H X H X X X X X
X
No Operation
NOP H X L H H H X X
X
Burst Stop
BSTH H X L H H L X X
X
Read
READ H X L H L H V L
V
Read with Auto
Pre-charge
READ
HX L H L H V H
A
V
Write
WRIT H X L H L L V L
V
Write with Auto
Pre-charge
WRITA H X L H L L V H
V
Bank Activate
ACT H X L
L
H
H
V
V
V
Pre-charge Select
PRE H X L
L
H
L
V
L
Bank
X
Pre-charge All
Banks
PALL H X L
L
H
L
X
H
X
Mode Register Set
MRS H X L
L
L
L
OP Code
Extended MRS
EMRS H X L
L
L
L
OP Code
H = High level, L = Low level, X = High or Low level (Don't care), V = Valid data input
2. CKE Truth Table
Item
Command
CKE
Symbol
/CS /RAS /CAS /WE Addr.
n-1 n
Idle
CBR Refresh Command REF H H L
L
LHX
Idle
Self Refresh Entry
SELF H L L
L
LHX
Self Refresh Self Refresh Exit
-
L HL
H
H
H
X
- L HH X X X X
Idle
Power Down Entry
-
H LX
X
XXX
Power
Down
Power Down Exit
-
L HX
X
X
X
X
H = High level, L = Low level, X = High or Low level (Don't care)
Sep. 2010
11/21
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