![](http://datasheet.mmic.net.cn/170000/S71WS512ND0BAWEH_datasheet_9723329/S71WS512ND0BAWEH_53.png)
December 3, 2005 S29WS-N_m0_I0
51
Pr elim ina r y
Table 10.25.
DQ6 and DQ2 Indications
5HDGLQJ7RJJOH %LWV'4'4
:KHQHYHU WKH V\VWHP LQLWLDOO\ EHJLQV UHDGLQJ WRJJOH ELW VWDWXV
LW PXVW UHDG '4±'4 DW OHDVW WZLFH LQ D URZ WR GHWHUPLQH ZKHWKHU D WRJJOH ELW LV WRJJOLQJ 7\S
LFDOO\ WKH V\VWHP ZRXOG QRWH DQG VWRUH WKH YDOXH RI WKH WRJJOH ELW DIWHU WKH ILUVW UHDG $IWHU WKH
VHFRQG UHDG WKH V\VWHP ZRXOG FRPSDUH WKH QHZ YDOXH RI WKH WRJJOH ELW ZLWK WKH ILUVW ,I WKH WRJ
JOH ELW LV QRW WRJJOLQJ WKH GHYLFH KDV FRPSOHWHG WKH SURJUDP RU HUDVHV RSHUDWLRQ 7KH V\VWHP
FDQ UHDG DUUD\ GDWD RQ '4±'4 RQ WKH IROORZLQJ UHDG F\FOH +RZHYHU LI DIWHU WKH LQLWLDO WZR
UHDG F\FOHV WKH V\VWHP GHWHUPLQHV WKDW WKH WRJJOH ELW LV VWLOO WRJJOLQJ WKH V\VWHP DOVR VKRXOG
QRWH ZKHWKHU WKH YDOXH RI '4 LV KLJK VHH WKH VHFWLRQ RQ '4 ,I LW LV WKH V\VWHP VKRXOG WKHQ
GHWHUPLQH DJDLQ ZKHWKHU WKH WRJJOH ELW LV WRJJOLQJ VLQFH WKH WRJJOH ELW PD\ KDYH VWRSSHG WRJ
JOLQJ MXVW DV '4 ZHQW KLJK ,I WKH WRJJOH ELW LV QR ORQJHU WRJJOLQJ WKH GHYLFH KDV VXFFHVVIXOO\
FRPSOHWHG WKH SURJUDP RU HUDVHV RSHUDWLRQ ,I LW LV VWLOO WRJJOLQJ WKH GHYLFH GLG QRW FRPSOHWH WKH
RSHUDWLRQ VXFFHVVIXOO\ DQG WKH V\VWHP PXVW ZULWH WKH UHVHW FRPPDQG WR UHWXUQ WR UHDGLQJ DUUD\
GDWD 7KH UHPDLQLQJ VFHQDULR LV WKDW WKH V\VWHP LQLWLDOO\ GHWHUPLQHV WKDW WKH WRJJOH ELW LV WRJJOLQJ
DQG '4 KDV QRW JRQH KLJK 7KH V\VWHP PD\ FRQWLQXH WR PRQLWRU WKH WRJJOH ELW DQG '4 WKURXJK
VXFFHVVLYHUHDGF\FOHV GHWHUPLQLQJWKHVWDWXVDV GHVFULEHGLQ WKHSUHYLRXVSDUDJUDSK $OWHUQD
WLYHO\ LW PD\ FKRRVH WR SHUIRUP RWKHU V\VWHP WDVNV ,Q WKLV FDVH WKH V\VWHP PXVW VWDUW DW WKH
EHJLQQLQJ RI WKH DOJRULWKP ZKHQ LW UHWXUQV WR GHWHUPLQH WKH VWDWXV RI WKH RSHUDWLRQ 5HIHU WR
)LJ1RWH
:KHQ YHULI\LQJ WKH VWDWXV RI D ZULWH RSHUDWLRQ HPEHGGHG SURJUDPHUDVH RI D PHPRU\
EDQN'4 DQG '4WRJJOHEHWZHHQKLJKDQGORZ VWDWHV LQDVHULHV RIFRQVHFXWLYH DQG FRQ
WLJXRXV VWDWXV UHDG F\FOHV ,Q RUGHU IRU WKLV WRJJOLQJ EHKDYLRU WR EH SURSHUO\ REVHUYHG WKH
FRQVHFXWLYH VWDWXV ELW UHDGV PXVW QRW EH LQWHUOHDYHG ZLWK UHDG DFFHVVHV WR RWKHU PHPRU\
EDQNV ,I LW LV QRW SRVVLEOH WR WHPSRUDULO\ SUHYHQW UHDGV WR RWKHU PHPRU\ EDQNV WKHQ LW LV
UHFRPPHQGHG WR XVH WKH '4 VWDWXV ELW DV WKH DOWHUQDWLYH PHWKRG RI GHWHUPLQLQJ WKH DFWLYH
RU LQDFWLYH VWDWXVRIWKH ZULWH RSHUDWLRQ
'DWD SROOLQJ SURYLGHV HUURQHRXV UHVXOWV GXULQJ HUDVH VXVSHQG RSHUDWLRQ XVLQJ '4 RU '4
IRU DQ\ DGGUHVV FKDQJHV DIWHU &( DVVHUDWLRQ RU ZLWKRXW $9' SXOVLQJ ORZ 7+H XVHU LV UH
TXLUHG WR SXOVH $9' IROORZLQJ DQ DGGUHVV FKDQJH RU DVVHUW &( DIWHU DGGUHVV LV VWDEOH GXU
LQJVWDWXVSROOLQJ6HH
)LJXUH WKURXJK
If device is
and the system reads
then DQ6
and DQ2
SURJUDPPLQJ
DW DQ\ DGGUHVV
WRJJOHV
GRHV QRWWRJJOH
DFWLYHO\ HUDVLQJ
DW DQ DGGUHVV ZLWKLQ D VHFWRU
VHOHFWHG IRU HUDVXUH
WRJJOHV
DOVR WRJJOHV
DW DQ DGGUHVV ZLWKLQ VHFWRUV QRW
VHOHFWHG IRU HUDVXUH
WRJJOHV
GRHVQRWWRJJOH
HUDVH VXVSHQGHG
DW DQ DGGUHVV ZLWKLQ D VHFWRU
VHOHFWHG IRU HUDVXUH
GRHV QRWWRJJOH
WRJJOHV
DW DQ DGGUHVV ZLWKLQ VHFWRUV QRW
VHOHFWHG IRU HUDVXUH
UHWXUQV DUUD\GDWD
UHWXUQV DUUD\ GDWD 7KH V\VWHP FDQ
UHDG IURP DQ\ VHFWRU QRW VHOHFWHG IRU
HUDVXUH
SURJUDPPLQJLQ
HUDVH VXVSHQG
DW DQ\ DGGUHVV
WRJJOHV
LV QRWDSSOLFDEOH