LXT906 Ver la hoja de datos (PDF) - LevelOne
Número de pieza
componentes Descripción
Lista de partido
LXT906 Datasheet PDF : 10 Pages
| |||
/;7äíç (WKHUQHW 7ZLVWHGð3DLU î &RD[ $GDSWHU
)81&7,21$/ '(6&5,37,21
7KH /;7äíç LQWHUIDFHV WKH FRD[LDO WUDQVFHLYHU õ$8,ô WR WKH
XQVKLHOGHG WZLVWHGðSDLU FDEOHVñ DOORZLQJ GDWD WUDQVIHU LQ
ERWK GLUHFWLRQVï 7KH $8, VLGH RI WKH LQWHUIDFH LV FRPSULVHG
RI WKUHH FLUFXLWVã 'DWD ,QSXW õ$,3 DQG $,1 WR WKH FRD[
UHFHLYHUôñ 'DWD 2XWSXW õ$23 DQG $21 IURP WKH FRD[
GULYHUôñ DQG &ROOLVLRQ ,QWHUIDFH õ&,3 DQG &,1 WR WKH FROOLð
VLRQ UHFHLYHUôï 7KH WZLVWHGðSDLU õ73ô QHWZRUN VLGH RI WKH
LQWHUIDFH LV FRPSULVHG RI WZR FLUFXLWVã 73 2XWSXW õ7323
DQG 7321 IURP WKH SXOVH VKDSHUô DQG 73 ,QSXW õ73,3 DQG
73,1 WR WKH 73 UHFHLYHUôï ,Q DGGLWLRQ WR WKHVH ILYH EDVLF FLUð
FXLWVñ WKH /;7äíç FRQWDLQV FU\VWDO RVFLOODWRU FLUFXLWU\ñ YDUð
LRXV ORJLF FRQWUROV DQG VHYHQ /(' GULYHUV IRU VWDWXV
LQGLFDWLRQVï
&RD[ WR 73 )XQFWLRQ
7KH /;7äíç UHFHLYHV GDWD IURP WKH FRD[ WUDQVFHLYHU õYLD
$,3 DQG $,1ô DQG UHðWUDQVPLWV LW WR WKH WZLVWHGðSDLU õ73ô
QHWZRUN RQ WKH 73 2XWSXW FLUFXLWï 7KH 73 2XWSXW VLJQDO
õRQ 7321 DQG 7323ô LV SUHðGLVWRUWHG WR PHHW WKH
ìí%$6(ð7 MLWWHU WHPSODWHï 7KH RXWSXW ZDYHIRUP õDIWHU WKH
WUDQVPLW ILOWHUô LV VKRZQ LQ )LJXUH ëï ,I WKH GLIIHUHQWLDO
LQSXWV õ$,3 DQG $,1ô IDOO EHORZ æèø RI WKH WKUHVKROG OHYHO
IRU å ELW WLPHV õW\SLFDOôñ WKH /;7äíç 73 WUDQVPLW IXQFWLRQ
ZLOO HQWHU WKH LGOH VWDWHï 'XULQJ LGOH SHULRGVñ WKH /;7äíç
WUDQVPLWV OLQN LQWHJULW\ WHVW SXOVHV RQ 7323 DQG 7321ï
)LJXUH ëã /;7äíç 732 2XWSXW :DYHIRUP.
73 WR &RD[ )XQFWLRQ
7KH /;7äíç UHFHLYHV GDWD IURP WKH WZLVWHGðSDLU õ73ô QHWð
ZRUN RQ WKH 73 ,QSXW FLUFXLW DQG UHðWUDQVPLWV LW WR WKH FRD[
WUDQVFHLYHU RQ WKH $2 FLUFXLWï $Q LQWHUQDO VTXHOFK IXQFWLRQ
GLVFULPLQDWHV QRLVH IURP OLQN WHVW SXOVHV DQG YDOLG GDWD
VWUHDPVï 2QO\ YDOLG GDWD VWUHDPV DFWLYDWH WKH 73 UHFHLYH
IXQFWLRQï ,I WKH GLIIHUHQWLDO LQSXWV DW WKH 73 ,QSXW FLUFXLW IDOO
EHORZ æèø RI WKH WKUHVKROG OHYHO õXQVTXHOFKHGô IRU å ELW
WLPHV õW\SLFDOôñ WKH /;7äíç 73 UHFHLYH IXQFWLRQ ZLOO HQWHU
WKH LGOH VWDWHï 7KH &RD[ðWRð73 GDWD SDWK LV GLVDEOHG ZKHQ
WKH 73ðWRð&RD[ SDWK LV DFWLYHï The Coax-to-TP path is
enabled 9 bit times after the end of TP-to-Coax transmission.
3RODULW\ 5HYHUVH )XQFWLRQ
7KH /;7äíç SRODULW\ UHYHUVH IXQFWLRQ XVHV ERWK OLQN SXOVHV
DQG HQGðRIðIUDPH GDWD WR GHWHUPLQH WKH SRODULW\ RI WKH
UHFHLYHG VLJQDOï $ UHYHUVHG SRODULW\ FRQGLWLRQ LV GHWHFWHG
ZKHQ HLJKW OLQN SXOVHV RI WKH RSSRVLWH õXQH[SHFWHGô SRODUð
LW\ DUH UHFHLYHG ZLWKRXW UHFHLSW RI D OLQN SXOVH ZLWK WKH
H[SHFWHG SRODULW\ï 5HYHUVHG SRODULW\ LV DOVR GHWHFWHG LI IRXU
IUDPHV DUH UHFHLYHG ZLWK D UHYHUVHG VWDUWðRIðLGOHï ,I WKH
/;7äíç HQWHUV WKH OLQN IDLO VWDWH DQG QR GDWD RU OLQN SXOVHV
DUH UHFHLYHG ZLWKLQ äç WR ìëå PVñ WKH SRODULW\ LV UHVHW WR WKH
GHIDXOW õQRQðIOLSSHGô FRQGLWLRQï 1RWH WKDW LI WKH /LQN ,QWHJð
ULW\ IXQFWLRQ LV GLVDEOHGñ SRODULW\ GHWHFWLRQ LV EDVHG RQO\
XSRQ UHFHLYHG GDWD SXOVHVï 7KH /;7äíç DXWRPDWLFDOO\ FRUð
UHFWV IRU UHYHUVHG SRODULW\ï
-DEEHU )XQFWLRQ
$ -DEEHU FRQGLWLRQ LV GHWHFWHG ZKHQ WKH /;7äíç KDV WUDQVð
PLWWHG FRQWLQXRXVO\ IRU ORQJHU WKDW è PV RQ 7323î7321
RU $23î$21ï ,I WKLV RFFXUVñ WKH UHSHDWHU VWDWH PDFKLQH
DQG RXWSXW GDWD WUDQVPLVVLRQ DUH GLVDEOHGñ DQG WKH -DEEHU
/(' VLJQDO õ/-$%ô JRHV /RZï 7UDQVPLVVLRQ LV UHðHQDEOHG
ZKHQ QR DFWLYLW\ KDV EHHQ GHWHFWHG RQ 73,3î73,1 RU $,3î
$,1 IRU çïé “Vï
/LQN ,QWHJULW\ 7HVW )XQFWLRQ
)LJXUH ê LV D VWDWH GLDJUDP RI WKH /;7äíç /LQN ,QWHJULW\
7HVW )XQFWLRQï 7KH /LQN ,QWHJULW\ 7HVW LV XVHG WR GHWHUPLQH
WKH VWDWXV RI WKH WZLVWHGðSDLU FDEOHï /LQN LQWHJULW\ WHVWLQJ LV
HQDEOHG ZKHQ WKH /, SLQ LV WLHG +LJKï :KHQ HQDEOHGñ WKH
UHFHLYHU UHFRJQL]HV OLQN LQWHJULW\ SXOVHV ZKLFK DUH WUDQVð
PLWWHG LQ WKH DEVHQFH RI UHFHLYH WUDIILFï ,I QR VHULDO GDWD
VWUHDP RU OLQN LQWHJULW\ SXOVHV DUH GHWHFWHG ZLWKLQ èí ð ìèí
PVñ WKH FKLS HQWHUV D OLQNðIDLO VWDWH DQG GLVDEOHV WKH WUDQVPLW
IXQFWLRQ DQG WKH UHSHDWHU VWDWH PDFKLQHï 7KH /;7äíç
LJQRUHV DQ\ OLQN LQWHJULW\ SXOVH ZLWK DQ LQWHUYDO RI OHVV WKDQ
ë ð æ PVï 7KH /;7äíç ZLOO UHPDLQ LQ WKH OLQN IDLO VWDWH XQWLO
LW GHWHFWV HLWKHU D VHULDO GDWD SDFNHW RU WZR RU PRUH OLQN
LQWHJULW\ SXOVHVï
&ROOLVLRQ 3URSDJDWLRQ
)XQFWLRQ
$ 73 FROOLVLRQ LV GHILQHG DV WKH VLPXOWDQHRXV SUHVHQFH RI
YDOLG VLJQDOV RQ ERWK WKH 73 ,QSXW FLUFXLW DQG WKH 73 2XWSXW
FLUFXLWï $ &RD[ FROOLVLRQ LV GHWHFWHG ZKHQ D YDOLG FROOLVLRQ
VLJQDO LV SUHVHQW DW &,3î&,1ï ,I D FROOLVLRQ LV GHWHFWHGñ WKH
DSSURSULDWH FROOLVLRQ /(' õ73 RU FRD[ô LV DFWLYDWHG DQG D
-DP IUDPH LV WUDQVPLWWHG DV GHVFULEHG LQ )LJXUH éï 7KH -DP
OHQJWK LV DOZD\V D PLQLPXP RI äç ELWVã çé ELWV RI DOWHUQDWð
LQJ ì©V DQG í©Vñ IROORZHG E\ DQ DOO ì©V SDWWHUQï
ììðìíí
L1
Share Link: 