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IS42VS16100E-75TLI Datasheet(PDF) 3 Page - Integrated Silicon Solution, Inc

Part # IS42VS16100E-75TLI
Description  2048 refresh cycles every 32 ms
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Manufacturer  ISSI [Integrated Silicon Solution, Inc]
Direct Link  http://www.issi.com
Logo ISSI - Integrated Silicon Solution, Inc

IS42VS16100E-75TLI Datasheet(HTML) 3 Page - Integrated Silicon Solution, Inc

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IS42VS16100E
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
3
Rev. 00E
01/21/2011
PINFUNCTIONS
PinNo.
Symbol
Type
Function(InDetail)
20to24
A0-A10
InputPin
A0toA10areaddressinputs.A0-A10areusedasrowaddressinputsduringactive
27to32
commandinputandA0-A7ascolumnaddressinputsduringreadorwritecommandinput.
A10isalsousedtodeterminetheprechargemodeduringothercommands.IfA10is
LOWduringprechargecommand,thebankselectedbyA11isprecharged,butifA10is
HIGH,bothbankswillbeprecharged.
WhenA10isHIGHinreadorwritecommandcycle,theprechargestartsautomatically
aftertheburstaccess.
ThesesignalsbecomepartoftheOPCODEduringmoderegistersetcommandinput.
19
A11
InputPin
A11isthebankselectionsignal.WhenA11isLOW,bank0isselectedandwhenhigh,
bank1isselected.ThissignalbecomespartoftheOPCODEduringmoderegisterset
commandinput.
16
CAS
InputPin
CAS
,inconjunctionwiththeRASandWE,formsthedevicecommand.Seethe
“CommandTruthTable”itemfordetailsondevicecommands.
34
CKE
InputPin
TheCKEinputdetermineswhethertheCLKinputisenabledwithinthedevice.Whenis
CKEHIGH,thenextrisingedgeoftheCLKsignalwillbevalid,andwhenLOW,invalid.
WhenCKEisLOW,thedevicewillbeineitherthepower-downmode,theclocksuspend
mode,ortheselfrefreshmode.TheCKEisanasynchronousinput.
35
CLK
InputPin
CLKisthemasterclockinputforthisdevice.ExceptforCKE,allinputstothisdeviceare
acquiredinsynchronizationwiththerisingedgeofthispin.
18
CS
InputPin
TheCSinputdetermineswhethercommandinputisenabledwithinthedevice.
CommandinputisenabledwhenCSisLOW,anddisabledwithCSisHIGH.Thedevice
remainsinthepreviousstatewhenCSisHIGH.
2,3,5,6,8,9,11 DQ0to
DQPin
DQ0toDQ15areDQpins.DQthroughthesepinscanbecontrolledinbyteunits
12,39,40,42,43,
DQ15
usingtheLDQMandUDQMpins.
45,46,48,49
14,36
LDQM,
InputPin
LDQMandUDQMcontrolthelowerandupperbytesoftheDQbuffers.Inread
UDQM
mode,LDQMandUDQMcontroltheoutputbuffer.WhenLDQMorUDQMisLOW,the
correspondingbufferbyteisenabled,andwhenHIGH,disabled.Theoutputsgo
to
theHIGHimpedancestatewhenLDQM/UDQMisHIGH.ThisfunctioncorrespondstoOE
inconventionalDRAMs.Inwritemode,LDQMandUDQMcontroltheinputbuffer.When
LDQMorUDQMisLOW,thecorrespondingbufferbyteisenabled,anddatacanbe
writtentothedevice.WhenLDQMorUDQMisHIGH,inputdataismaskedandcannotbe
writtentothedevice.
17
RAS
InputPin
RAS
,inconjunctionwithCASandWE,formsthedevicecommand.Seethe“Command
TruthTable”itemfordetailsondevicecommands.
15
WE
InputPin
WE,inconjunctionwithRASandCAS,formsthedevicecommand.Seethe“Command
TruthTable”itemfordetailsondevicecommands.
7,13,38,44
VDDQ
PowerSupplyPin
VDDQistheoutputbufferpowersupply.
1,25
VDD
PowerSupplyPin
VDDisthedeviceinternalpowersupply.
4,10,41,47
VSSQ
PowerSupplyPin
VSSQistheoutputbufferground.
26,50
VSS
PowerSupplyPin
VSSisthedeviceinternalground.


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