Z85230 Datasheet, PDF (26/120 Pages) Zilog, Inc. – ENHANCED SERIAL COMMUNICATIONS CONTROLLER

==
(QKDQFHG 6HULDO &RPPXQLFDWLRQV &RQWUROOHU

DGGUHVV )UDPHV QRW PDWFKLQJ HLWKHU WKH XVHUVHOHFWHG RU EURDGFDVW DGGUHVV DUH
LJQRUHG
7KH QXPEHU RI DGGUHVV E\WHV DUH H[WHQGHG XQGHU VRIWZDUH FRQWURO 7R UHFHLYH
GDWD DQ LQWHUUXSW RQ WKH ILUVW UHFHLYHG FKDUDFWHU RU DQ LQWHUUXSW RQ HYHU\ FKDUDF
WHU RU 2Q 6SHFLDO &RQGLWLRQ 2QO\ HQGRIIUDPH FDQ EH VHOHFWHG 7KH UHFHLYHU
DXWRPDWLFDOO\ GHOHWHV DOO ]HURV LQVHUWHG E\ WKH WUDQVPLWWHU GXULQJ FKDUDFWHU DVVHP
EO\ &5& LV DOVR FDOFXODWHG DQG LV DXWRPDWLFDOO\ FKHFNHG WR YDOLGDWH IUDPH WUDQV
PLVVLRQ $W WKH HQG RI WUDQVPLVVLRQ WKH VWDWXV RI D UHFHLYHG IUDPH LV DYDLODEOH LQ
WKH VWDWXV UHJLVWHUV ,Q 6'/& PRGH WKH (6&& PXVW EH SURJUDPPHG WR XVH WKH
&5&&&,77 SRO\QRPLDO EXW WKH JHQHUDWRU DQG FKHFNHU PD\ EH SUHVHW WR DOO V RU
DOO V 7KH &5& LV LQYHUWHG EHIRUH WUDQVPLVVLRQ DQG WKH UHFHLYHU FKHFNV DJDLQVW
WKH ELW SDWWHUQ 0001110100001111
15= 15=, RU )0 FRGLQJ PD\ EH XVHG LQ DQ\ ; PRGH 7KH SDULW\ RSWLRQV DYDLO
DEOH LQ DV\QFKURQRXV PRGHV DUH DOVR DYDLODEOH LQ 6<1&+521286 PRGHV +RZ
HYHU SDULW\ FKHFNLQJ LV QRW QRUPDOO\ XVHG IRU 6'/& EHFDXVH &5& FKHFNLQJ LV
PRUH UREXVW
6'/& /RRS 0RGH
7KH (6&& VXSSRUWV 6'/& /223 PRGH DV ZHOO DV QRUPDO 6'/& ,Q 6'/& /223
PRGH D SULPDU\ FRQWUROOHU VWDWLRQ PDQDJHV WKH PHVVDJH WUDIILF IORZ RQ WKH ORRS
DQG DQ\ QXPEHU RI VHFRQGDU\ VWDWLRQV ,Q 6'/& /223 PRGH WKH (6&& SHUIRUPV
WKH IXQFWLRQV RI D VHFRQGDU\ VWDWLRQ $Q (6&& RSHUDWLRQ LQ UHJXODU 6'/& PRGH
PD\ DFW DV D FRQWUROOHU VHH )LJXUH  6'/& /223 PRGH FDQ EH VHOHFWHG E\
VHWWLQJ :5 ELW  WR 
&RQWUROOHU
6HFRQGDU\ 
6HFRQGDU\ 
6HFRQGDU\ 
6HFRQGDU\ 
)LJXUH  6'/& /RRS
$ VHFRQGDU\ VWDWLRQ LQ DQ 6'/& /223 PRGH DOZD\V PRQLWRUV WKH PHVVDJHV VHQW
DURXQG WKH ORRS DQG SDVVHV WKHVH PHVVDJHV WR WKH UHVW RI WKH ORRS UHWUDQVPLWWLQJ
WKHP ZLWK D RQHELW WLPH GHOD\ 7KH VHFRQGDU\ VWDWLRQ SODFHV LWV RZQ PHVVDJH RQ
36
)XQFWLRQDO 'HVFULSWLRQ