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V58C2256 Datasheet(PDF) 49 Page - Mosel Vitelic, Corp

Part # V58C2256
Description  HIGH PERFORMANCE 2.5 VOLT 256 Mbit DDR SDRAM
PDF  61 Pages
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Manufacturer  MOSEL [Mosel Vitelic, Corp]
Direct Link  http://www.moselvitelic.com
Logo MOSEL - Mosel Vitelic, Corp

V58C2256 Datasheet(HTML) 49 Page - Mosel Vitelic, Corp

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49
MOSEL VITELIC
V58C2256(804/404/164)S
V58C2256(804/404/164)S Rev. 1.4 October 2002
Figure 38 - INITIALIZE AND MODE REGISTER SETS
CKE
LVCMOS LOW LEVEL
DQ
BA0, BA1
200 cycles of CLK**
Extended
Mode
Register
Set
Load
Mode
Register,
Reset DLL
(with A8 = H)
Load
Mode
Register
(with A8 = L)
tMRD
tMRD
tMRD
tRP
tRFC
tRFC
t IS
Power-up:
VDD and
CLK stable
T = 200
µs
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tIH
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DQS
High-Z
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A0-A9, A11
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A10
ALL BANKS
DON'T CARE
CK
/CK
tCK
tCH
tCL
VTT
(system*)
t VTD
VREF
VDD
VDDQ
COMMAND
MRS
NOP
PRE
EMRS
AR
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AR
tIS tIH
BA0=H,
BA1=L
tIS tIH
tIS tIH
BA0=L,
BA1=L
tIS tIH
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CODE
tIS tIH
CODE
MRS
BA0=L,
BA1=L
CODE
CODE
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PRE
ALL BANKS
tIS tIH
RA
RA
ACT
BA
* = VTT is not applied directly to the device, however tVTD must be greater than or equal to zero to avoid device latch-up.
** = tMRD is required before any command can be applied, and 200 cycles of CK are required before a READ command can be applied.
The two Auto Refresh commands may be moved to follow the first MRS, but precede the second PRECHARGE ALL command.
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CODE
CODE



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