English
Language : 

Z80C30 Datasheet, PDF (41/96 Pages) Zilog, Inc. – CMOS SCC SERIAL COMMUNICATIONS CONTROLLER
=&=& &026 6&&
6HULDO &RPPXQLFDWLRQV &RQWUROOHU

5DWH *HQHUDWRU LQSXW IUHTXHQF\ LQ +HUW] 7KH FORFN PRGH LV  
 RU  DV VHOHFWHG LQ :ULWH 5HJLVWHU  ELWV ' DQG ' 6\QFKUR
QRXV RSHUDWLRQ PRGHV VHOHFW  DQG $V\QFKURQRXV PRGHV VHOHFW
  RU 
PCLK or RTxC Frequency
Time Constant =
-2
2(Baud Rate)(Clock Rate)
'LJLWDO 3KDVH/RFNHG /RRS
7KH 6&& FRQWDLQV D 'LJLWDO 3KDVH/RFNHG /RRS '3// WR UHFRYHU
FORFN LQIRUPDWLRQ IURP D GDWD VWUHDP ZLWK 15=, RU )0 HQFRGLQJ
7KH '3// LV GULYHQ E\ D FORFN WKDW LV QRPLQDOO\  15=, RU 
)0 WLPHV WKH GDWD UDWH 7KH '3// XVHV WKLV FORFN DORQJ ZLWK WKH
GDWD VWUHDP WR FRQVWUXFW D FORFN IRU WKH GDWD 7KLV FORFN LV XVHG DV
WKH 6&& UHFHLYH FORFN WKH WUDQVPLW FORFN RU ERWK :KHQ WKH '3//
LV VHOHFWHG DV WKH WUDQVPLW FORFN VRXUFH LW SURYLGHV D MLWWHUIUHH
FORFN RXWSXW WKDW LV WKH '3// LQSXW IUHTXHQF\ GLYLGHG E\ WKH DSSUR
SULDWH GLYLVRU IRU WKH VHOHFWHG HQFRGLQJ WHFKQLTXH
)RU 15=, HQFRGLQJ WKH '3// FRXQWV WKH [ FORFN WR FUHDWH QRPL
QDO ELW WLPHV $V WKH [ FORFN LV FRXQWHG WKH '3// LV VHDUFKLQJ
WKH LQFRPLQJ GDWD VWUHDP IRU HGJHV HLWKHU  WR  RU  WR   :KHQ
HYHU DQ HGJH LV GHWHFWHG WKH '3// PDNHV D FRXQW DGMXVWPHQW
GXULQJ WKH QH[W FRXQWLQJ F\FOH  SURGXFLQJ D WHUPLQDO FRXQW FORVHU
WR WKH FHQWHU RI WKH ELW FHOO
)RU )0 HQFRGLQJ WKH '3// DJDLQ FRXQWV IURP  WR  EXW ZLWK D
F\FOH FRUUHVSRQGLQJ WR WZR ELW WLPHV :KHQ WKH '3// LV ORFNHG WKH
FORFN HGJHV LQ WKH GDWD VWUHDP RFFXU EHWZHHQ FRXQWV  DQG 
DQG EHWZHHQ FRXQWV  DQG  7KH '3// ORRNV IRU HGJHV RQO\ GXU
LQJ D WLPH FHQWHUHG RQ WKH  WR  FRXQWLQJ WUDQVLWLRQ
)XQFWLRQDO 'HVFULSWLRQ
36