24LC09 Datasheet, PDF (6/20 Pages) Microchip Technology – 8K 2.5V ACR SERIAL EEPROM

/&
 6WRS 'DWD 7UDQVIHU &
$ ORZ WR KLJK WUDQVLWLRQ RI WKH 6'$ OLQH ZKLOH WKH .OR.N
6&/ LV KLJK GHWHUPLQHV D VWRS .RQGLWLRQ $OO RSHUD
WLRQV PXVW EH HQGHG ZLWK D VWRS .RQGLWLRQ
 'DWD 9DOLG '
7KH VWDWH RI WKH GDWD OLQH UHSUHVHQWV YDOLG GDWD ZKHQ
DIWHU D VWDUW .RQGLWLRQ WKH GDWD OLQH LV VWDEOH IRU WKH
GXUDWLRQ RI WKH KLJK SHULRG RI WKH .OR.N VLJQDO
7KH GDWD RQ WKH OLQH PXVW EH .KDQJHG GXULQJ WKH ORZ
SHULRG RI WKH .OR.N VLJQDO 7KHUH LV RQH .OR.N SXOVH SHU
ELW RI GDWD
(D.K GDWD WUDQVIHU LV LQLWLDWHG ZLWK D VWDUW .RQGLWLRQ DQG
WHUPLQDWHG ZLWK D VWRS .RQGLWLRQ 7KH QXPEHU RI WKH
GDWD E\WHV WUDQVIHUUHG EHWZHHQ WKH VWDUW DQG VWRS .RQ
GLWLRQV LV GHWHUPLQHG E\ WKH PDVWHU GHYL.H DQG LV WKHR
UHWL.DOO\ XQOLPLWHG DOWKRXJK RQO\ WKH ODVW  ZLOO EH
VWRUHG ZKHQ GRLQJ D ZULWH RSHUDWLRQ :KHQ DQ RYHU
ZULWH GRHV R..XU LW ZLOO UHSOD.H GDWD LQ D ILUVW LQ ILUVW RXW
IDVKLRQ
 $.NQRZOHGJH
(D.K UH.HLYLQJ GHYL.H ZKHQ DGGUHVVHG LV REOLJHG WR
JHQHUDWH DQ D.NQRZOHGJH DIWHU WKH UH.HSWLRQ RI HD.K
E\WH 7KH PDVWHU GHYL.H PXVW JHQHUDWH DQ H[WUD .OR.N
SXOVH ZKL.K LV DVVR.LDWHG ZLWK WKLV D.NQRZOHGJH ELW
1RWH
7KH /& GRHV QRW JHQHUDWH DQ\
D.NQRZOHGJH ELWV LI DQ LQWHUQDO SURJUDP
PLQJ .\.OH LV LQ SURJUHVV
7KH GHYL.H WKDW D.NQRZOHGJHV KDV WR SXOO GRZQ WKH
6'$ OLQH GXULQJ WKH D.NQRZOHGJH .OR.N SXOVH LQ VX.K D
ZD\ WKDW WKH 6'$ OLQH LV VWDEOH ORZ GXULQJ WKH KLJK
SHULRG RI WKH D.NQRZOHGJH UHODWHG .OR.N SXOVH 2I
.RXUVH VHWXS DQG KROG WLPHV PXVW EH WDNHQ LQWR
D..RXQW $ PDVWHU PXVW VLJQDO DQ HQG RI GDWD WR WKH
VODYH E\ QRW JHQHUDWLQJ DQ D.NQRZOHGJH ELW RQ WKH ODVW
E\WH WKDW KDV EHHQ .OR.NHG RXW RI WKH VODYH ,Q WKLV
.DVH WKH VODYH PXVW OHDYH WKH GDWD OLQH +,*+ WR HQDEOH
WKH PDVWHU WR JHQHUDWH WKH VWRS .RQGLWLRQ
 'HYL.H $GGUHVVLQJ
$ .RQWURO E\WH LV WKH ILUVW E\WH UH.HLYHG IROORZLQJ WKH
VWDUW .RQGLWLRQ IURP WKH PDVWHU GHYL.H 7KH .RQWURO E\WH
.RQVLVWV RI D ELW .RQWURO .RGH IRU WKH /& WKLV LV
VHW DV 1011 ELQDU\ IRU UHDG DQG ZULWH RSHUDWLRQV 7KH
QH[W WKUHH ELWV RI WKH .RQWURO E\WH DUH WKH EOR.N VHOH.W
ELWV % % %  % LV D GRQ W .DUH IRU WKH /&
7KH\ DUH XVHG E\ WKH PDVWHU GHYL.H WR VHOH.W ZKL.K RI
WKH IRXU  ZRUG EOR.NV RI PHPRU\ DUH WR EH
D..HVVHG 7KHVH ELWV DUH LQ HIIH.W WKH PRVW VLJQLIL.DQW
ELWV RI WKH ZRUG DGGUHVV
7KH ODVW ELW RI WKH .RQWURO E\WH GHILQHV WKH RSHUDWLRQ WR
EH SHUIRUPHG :KHQ VHW WR RQH D UHDG RSHUDWLRQ LV
VHOH.WHG ZKHQ VHW WR ]HUR D ZULWH RSHUDWLRQ LV VHOH.WHG
)ROORZLQJ WKH VWDUW .RQGLWLRQ WKH /& PRQLWRUV WKH
6'$ EXV .KH.NLQJ WKH GHYL.H W\SH LGHQWLILHU EHLQJ
WUDQVPLWWHG XSRQ D 1011 .RGH WKH VODYH GHYL.H RXW
SXWV DQ D.NQRZOHGJH VLJQDO RQ WKH 6'$ OLQH 'HSHQG
LQJ RQ WKH VWDWH RI WKH 5: ELW WKH /& ZLOO VHOH.W D
UHDG RU ZULWH RSHUDWLRQ
2SHUDWLRQ
5HDG
:ULWH
&RQWURO
&RGH
1011
1011
%OR.N 6HOH.W
%OR.N $GGUHVV
%OR.N $GGUHVV
5:


),*85( 
&21752/ %<7(
$//2&$7,21
67$57
5($':5,7(
6/$9( $''5(66
5: $
1 0 1 1 ; % %
; 'RQ¶W .DUH
'6$SDJH 
  0L.UR.KLS 7H.KQRORJ\ ,Q.