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Последовательные порты ПЭВМ. Интерфейс 232С

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E?EOONEEE AINOAeA?NOAAIIUE

OAOIE*ANEEE OIEAA?NEOAO

Eeaa?iaoe/aneee oaeoeueoao

Eaoaae?a Au/eneeoaeueiie Oaoieee

?aoa?ao ia oaio:

Iineaaeiaaoaeueiua ii?ou IYAI.

Eioa?oaen RS–232C.

Aeenoeeieeia:

Noaiioaoieea

Auiieiee(

nooaeaio a?oiiu

YAI-94-1

Ino?ianeee I.N.

1996 a.

Niaea?aeaiea

TOC \o “1-3” Iineaaeiaaoaeueiay ia?aaea/a aeaiiuo GOTOBUTTON
_Toc374716104 PAGEREF _Toc374716104 3

Iauea naaaeaiey i eioa?oaena RS–232C GOTOBUTTON _Toc374716105
PAGEREF _Toc374716105 4

Aeaeu neaiaeia GOTOBUTTON _Toc374716109 PAGEREF _Toc374716109 7

Oniaa?oainoaiaaiey GOTOBUTTON _Toc374716113 PAGEREF _Toc374716113
9

Oanoiaia iai?oaeiaaiea aeey eioa?oaena RS–232C GOTOBUTTON
_Toc374716114 PAGEREF _Toc374716114 9

Eniieueciaaiiay eeoa?aoo?a GOTOBUTTON _Toc374716115 PAGEREF
_Toc374716115 11

TOC \t “Nienie ?enoieia” \c

Oaaeeoea 1. Ooieoeee neaiaeueiuo eeiee eioa?oaena RS–232C. GOTOBUTTON
_Toc374716527 PAGEREF _Toc374716527 5

Oaaeeoea 2. Iniiaiua eeiee eioa?oaena RS–232C. GOTOBUTTON
_Toc374716529 PAGEREF _Toc374716529 7

?en. 1. Iacia/aiea eeiee 25–eiioaeoiiai ?acuaia oeia D aeey eioa?oaena
RS–232C GOTOBUTTON _Toc374716528 PAGEREF _Toc374716528 6

?en. 2. I?aaenoaaeaiea eiaea aoeau A neaiaeueiuie o?iaiyie OOE.
GOTOBUTTON _Toc374716530 PAGEREF _Toc374716530 8

?en. 3. Aeae eiaea aoeau A ia neaiaeueiuo eeieyo TXD e RXD. GOTOBUTTON
_Toc374716531 PAGEREF _Toc374716531 8

?en. 4. Oeie/iay noaia eioa?oaena RS–232C. GOTOBUTTON _Toc374716532
PAGEREF _Toc374716532 9

Iineaaeiaaoaeueiay ia?aaea/a aeaiiuo

Iee?ii?ioeanni?iay nenoaia aac n?aaenoa aaiaea e auaiaea ieacuaaaony
aaniieaciie. Oa?aeoa?enoeee e iauaiu aaiaea e auaiaea a nenoaia
ii?aaeaeythony, a ia?aoth i/a?aaeue, niaoeeoeeie aa i?eiaiaiey —
iai?eia?, a iee?ii?ioeanni?iie nenoaia oi?aaeaiey iaeioi?ui i?iiuoeaiiui
i?ioeannii ia o?aaoaony eeaaeaoo?a e aeenieae, oae eae ii/oe iaaa?iyea
aa aeenoaioeeiiii i?ia?aiie?oao e eiio?iee?oao aeaaiue iee?ieiiiuethoa?
(n eniieueciaaieai iineaaeiaaoaeueiie eeiee RS–232C).

Iineieueeo aeaiiua iau/ii i?aaenoaaeaiu ia oeia iee?ii?ioeanni?a a
ia?aeeaeueiie oi?ia (aaeoaie, neiaaie), eo iineaaeiaaoaeueiue
aaiae–auaiae ieacuaaaony ianeieueei neiaeiui. Aeey iineaaeiaaoaeueiiai
aaiaea iio?aaoaony n?aaenoaa i?aia?aciaaiey iineaaeiaaoaeueiuo aoiaeiuo
aeaiiuo a ia?aeeaeueiua aeaiiua, eioi?ua iiaeii iiianoeoue ia oeio. N
ae?oaie noi?iiu, aeey iineaaeiaaoaeueiiai auaiaea iaiaoiaeeiu n?aaenoaa
i?aia?aciaaiey ia?aeeaeueiuo aeaiiuo, i?aaenoaaeaiiuo ia oeia, a
iineaaeiaaoaeueiua auoiaeiua aeaiiua. A ia?aii neo/aa i?aia?aciaaiea
inouanoaeyaony ?aaeno?ii naeaeaa n iineaaeiaaoaeueiui aoiaeii e
ia?aeeaeueiui auoiaeii (SIPO), a ai aoi?ii — ?aaeno?ii naeaeaa n
ia?aeeaeueiui aoiaeii e iineaaeiaaoaeueiui auoiaeii (PISO).

Iineaaeiaaoaeueiua aeaiiua ia?aaeathony a neio?iiiii eee aneio?iiiii
?aaeeiao. A neio?iiiii ?aaeeia ana ia?aaea/e inouanoaeythony iiae
oi?aaeaieai iauaai neaiaea neio?iiecaoeee, eioi?ue aeieaeai
i?enoonoaiaaoue ia iaieo eiioeao eeiee nayce. Aneio?iiiay ia?aaea/a
iiae?acoiaaaao ia?aaea/o aeaiiuo iaeaoaie; eaaeaeue iaeao niaea?aeeo
iaiaoiaeeioth eioi?iaoeeth, o?aaothuothny aeey aeaeiaee?iaaiey
niaea?aeaueony a iai aeaiiuo. Eiia/ii, aoi?ie ?aaeei neiaeiaa, ii o iaai
anoue na?ueaciia i?aeiouanoai: ia ioaeai ioaeaeueiue neaiae
neio?iiecaoeee.

Nouanoaotho niaoeeaeueiua iee?inoaiu aaiaea e auaiaea, ?aoathuea
i?iaeaiu i?aia?aciaaiey, iienaiiua auoa. Aio nienie iaeaieaa oeie/iuo
neaiaeia oaeeo iee?inoai:

D0–D7 — aoiaeiua–auoiaeiua eeiee aeaiiuo, iiaeeeth/aaiua
iaiin?aaenoaaiii e oeia i?ioeanni?a;

RXD — i?eieiaaiua aeaiiua (aoiaeiua iineaaeiaaoaeueiua aeaiiua);

TXD — ia?aaeaaaaiua aeaiiua (auoiaeiua iineaaeiaaoaeueiua aeaiiua);

CTS — na?in ia?aaea/e. Ia yoie eeiee ia?eoa?eeiia ono?ienoai oi?ie?oao
neaiae ieceiai o?iaiy, eiaaea iii aioiai aini?eieiaoue eioi?iaoeeth io
i?ioeanni?a;

RTS — cai?in ia?aaea/e. Ia yoo eeieth iee?ii?ioeanni?iay nenoaia auaeaao
neaiae ieceiai o?iaiy, eiaaea iia iaia?aia ia?aaeaaaoue aeaiiua a
ia?eoa?eeiia ono?ienoai.

Ana neaiaeu i?ia?aiie?oaiuo iee?inoai iineaaeiaaoaeueiiai aaiaea–auaiaea
OOE–niaianoeiu. Yoe neaiaeu ?ann/eoaiu oieueei ia i/aiue ei?ioeea eeiee
nayce. Aeey iineaaeiaaoaeueiie ia?aaea/e aeaiiuo ia cia/eoaeueiua
?annoiyiey o?aaothony aeiiieieoaeueiua aooa?u e i?aia?aciaaoaee o?iaiae,
aeeth/aaiua iaaeaeo iee?inoaiaie iineaaeiaaoaeueiiai aaiaea–auaiaea e
eeieae nayce.

Iauea naaaeaiey i eioa?oaena RS–232C

Eioa?oaen RS–232C yaeyaony iaeaieaa oe?iei ?ani?ino?aiaiiie noaiaea?oiie
iineaaeiaaoaeueiie naycueth iaaeaeo iee?ieiiiuethoa?aie e ia?eoa?eeiuie
ono?ienoaaie. Eioa?oaen, ii?aaeaeaiiue noaiaea?oii Annioeeaoeee
yeaeo?iiiie i?iiuoeaiiinoe (EIA), iiae?acoiaaaao iaee/ea iai?oaeiaaiey
aeaoo aeaeia: oa?ieiaeueiiai DTE e nayciiai DCE.

*oiau ia ninoaaeoue iai?aaeeueiiai i?aaenoaaeaiey ia eioa?oaena RS–232C,
iaiaoiaeeii io/aoeeai iiieiaoue ?acee/ea iaaeaeo yoeie aeaeaie
iai?oaeiaaiey. Oa?ieiaeueiia iai?oaeiaaiea, iai?eia? iee?ieiiiuethoa?,
iiaeao iinueaoue e (eee) i?eieiaoue aeaiiua ii iineaaeiaaoaeueiiio
eioa?oaeno. Iii eae au ieai/eaaao (terminate) iineaaeiaaoaeueioth
eeieth. Nayciia iai?oaeiaaiea — ono?ienoaa, eioi?ua iiaoo oi?inoeoue
ia?aaea/o aeaiiuo niaianoii n oa?ieiaeueiui iai?oaeiaaieai. Iaaeyaeiui
i?eia? nayciiai iai?oaeiaaiey neoaeeo iiaeai (iiaeoeyoi?–aeaiiaeoeyoi?).
Ii ieacuaaaony niaaeeieoaeueiui caaiii a iineaaeiaaoaeueiie oeaii/ea
iaaeaeo eiiiuethoa?ii e oaeaoiiiie eeieae.

?acee/ea iaaeaeo oa?ieiaeueiuie e nayciuie ono?ienoaaie aeiaieueii
?anieua/aoi, iiyoiio aicieeatho iaeioi?ua neiaeiinoe a iiieiaiee oiai, e
eaeiio oeio iai?oaeiaaiey ioiineony oi eee eiia ono?ienoai. ?anniio?ei
neooaoeeth n i?eioa?ii. E eaeiio iai?oaeiaaieth aai ioianoe? Eae
naycaoue aeaa eiiiuethoa?a, eiaaea iie iaa aeaenoaotho eae oa?ieiaeueiia
iai?oaeiaaiea. Aeey ioaaoa ia yoe aii?inu neaaeoao ?anniio?aoue
oece/aneia niaaeeiaiea ono?ienoa. I?iecaaaey iacia/eoaeueiua eciaiaiey a
eeieyo eioa?oaena RS–232C, iiaeii canoaaeoue nayciia iai?oaeiaaiea
ooieoeeiie?iaaoue eae oa?ieiaeueiia. *oiau ?acia?aoueny a oii, eae yoi
naeaeaoue, ioaeii i?iaiaeece?iaaoue ooieoeee neaiaeia eioa?oaena RS–232C
(oaaeeoea 1).

Oaaeeoea 1. Ooieoeee neaiaeueiuo eeiee eioa?oaena RS–232C.

Iiia? eiioaeoa Nie?auaiea Iai?aaeaiea Iieiia iacaaiea

1 FG — Iniiaiay eee caueoiay caiey

2 TD (TXD) E DCE Ia?aaeaaaaiua aeaiiua

3 RD (RXD) E DTE I?eieiaaiua aeaiiua

4 RTS E DCE Cai?in ia?aaea/e

5 CTS E DTE Na?in ia?aaea/e

6 DSR E DTE Aioiaiinoue iiaeaia

7 SG — Neaiaeueiay caiey

8 DCD E DTE Iaia?oaeaiea ianouae aeaiiuo

9 — E DTE (Iieiaeeoaeueiia eiio?ieueiia iai?yaeaiea)

10 — E DTE (Io?eoeaoaeueiia eiio?ieueiia iai?yaeaiea)

11 QM E DTE ?aaeei au?aaieaaiey

12 SDCD E DTE Iaia?oaeaiea ianouae aoi?e/iuo aeaiiuo

13 SCTS E DTE Aoi?e/iue na?in ia?aaea/e

14 STD E DCE Aoi?e/iua ia?aaeaaaaiua aeaiiua

15 TC E DTE Neio?iiecaoeey ia?aaeao/eea

16 SRD E DTE Aoi?e/iua i?eieiaaiua aeaiiua

17 RC E DTE Neio?iiecaoeey i?eaiieea

18 DCR E DCE ?acaeaeaiiay neio?iiecaoeey i?eaiieea

19 SRTS E DCE Aoi?e/iue cai?in ia?aaea/e

20 DTR E DCE Aioiaiinoue oa?ieiaea

21 SQ E DTE Ea/anoai neaiaea

22 RI E DTE Eiaeeeaoi? caiiea

23 — E DCE (Naeaeoi? nei?inoe aeaiiuo)

24 TC E DCE Aiaoiyy neio?iiecaoeey ia?aaeao/eea

25 — E DCE (Caiyoinoue)

I?eia/aiey:

Eeiee 11, 18, 25 iau/ii n/eoatho iacacaieaiiuie. I?eaaaeaiiay a oaaeeoea
niaoeeoeeaoeey ioiineony e niaoeeoeeaoeeyi Bell 113B e 208A.

Eeiee 9 e 10 eniieuecothony aeey eiio?iey io?eoeaoaeueiiai (MARK) e
iieiaeeoaeueiiai (SPACE) o?iaiae iai?yaeaiey.

Ai ecaaaeaiea iooaieoeu iaaeaeo RD (Read — n/eouaaoue) e RD (Received
Data — i?eieiaaiua aeaiiua) aoaeoo eniieueciaaoueny iaicia/aiey RXD e
TXD, a ia RD e TD.

Noaiaea?oiue iineaaeiaaoaeueiue ii?o RS–232C eiaao oi?io 25–eiioaeoiiai
?acuaia oeia D (?en 1).

?en. 1. Iacia/aiea eeiee 25–eiioaeoiiai ?acuaia oeia D aeey eioa?oaena
RS–232C

Oa?ieiaeueiia iai?oaeiaaiea iau/ii iniauaii ?acuaiii ni oou?ueeaie, a
nayciia — ?acuaiii n ioaa?noeyie (ii iiaoo auoue e eneeth/aiey).

Neaiaeu eioa?oaena RS–232C iiae?acaeaeythony ia neaaeothuea eeannu.

Iineaaeiaaoaeueiua aeaiiua (iai?eia?, TXD, RXD). Eioa?oaen RS–232C
iaania/eaaao aeaa iacaaeneiuo iineaaeiaaoaeueiuo eaiaea aeaiiuo:
ia?ae/iue (aeaaiue) e aoi?e/iue (aniiiiaaoaeueiue). Iaa eaiaea iiaoo
?aaioaoue a aeoieaeniii ?aaeeia, o.a. iaeiia?aiaiii inouanoaeytho
ia?aaea/o e i?eai eioi?iaoeee.

Oi?aaeythuea neaiaeu eaeoe?iaaiey (iai?eia?, RTS, CTS). Neaiaeu
eaeoe?iaaiey — n?aaenoai, n iiiiuueth eioi?iai iaiai neaiaeaie iicaieyao
DTE ia/aoue aeeaeia n DCE aei oaeoe/aneie ia?aaea/e eee i?eaia aeaiiuo
ii iineaaeiaaoaeueiie eeiee nayce.

Neaiaeu neio?iiecaoeee (iai?eia?, TC, RC). A neio?iiiii ?aaeeia (a
ioee/ea io aieaa ?ani?ino?aiaiiiai aneio?iiiiai) iaaeaeo ono?ienoaaie
iaiaoiaeeii ia?aaeaaaoue neaiaeu neio?iiecaoeee, eioi?ua oi?iuatho
neio?iieci i?eieiaaiiai neaiaea a oeaeyo aai aeaeiaee?iaaiey.

Ia i?aeoeea aniiiiaaoaeueiue eaiae RS–232C i?eiaiyaony ?aaeei, e a
aneio?iiiii ?aaeeia aianoi 25 eeiee eniieuecothony 9 eeiee (oaaeeoea 2).

Oaaeeoea 2. Iniiaiua eeiee eioa?oaena RS–232C.

Iiia? eiioaeoa Neaiae Auiieiyaiay ooieoeey

1 FG Iiaeeeth/aiea caiee e noieea eee oanne iai?oaeiaaiey

2 TXD Iineaaeiaaoaeueiua aeaiiua, ia?aaeaaaaiua io DTE e DCE

3 RXD Iineaaeiaaoaeueiua aeaiiua, i?eieiaaiua DTE io DCE

4 RTS O?aaiaaiea DTE iineaoue aeaiiua e DCE

5 CTS Aioiaiinoue DCE i?eieiaoue aeaiiua io DTE

6 DSR Niiauaiea DCE i oii, /oi naycue onoaiiaeaia

7 SG Aica?aoiue o?aeo iauaai neaiaea (caiee)

8 DCD DTE ?aaioaao e DCE iiaeao iiaeeeth/eony e eaiaeo nayce

Aeaeu neaiaeia

A aieueoeinoaa noai, niaea?aeaueo eioa?oaen RS–232C, aeaiiua
ia?aaeathony aneio?iiii, o.a. a aeaea iineaaeiaaoaeueiinoe iaeaoa
aeaiiuo. Eaaeaeue iaeao niaea?aeeo iaeei neiaie eiaea ASCII, i?e/ai
eioi?iaoeey a iaeaoa aeinoaoi/ia aeey aai aeaeiaee?iaaiey aac
ioaeaeueiiai neaiaea neio?iiecaoeee.

Neiaieu eiaea ASCII i?aaenoaaeythony naiueth aeoaie, iai?eia? aoeaa A
eiaao eiae 1000001. *oiau ia?aaeaoue aoeao A ii eioa?oaeno RS–232C,
iaiaoiaeeii aaanoe aeiiieieoaeueiua aeou, iaicia/athuea ia/aei e eiiaoe
iaeaoa. E?iia oiai, aeaeaoaeueii aeiaaaeoue eeoiee aeo aeey i?inoiai
eiio?iey ioeaie ii ia?eoaoo (/aoiinoe).

Iaeaieaa oe?iei ?ani?ino?aiai oi?iao, aeeth/athuee a naay iaeei
noa?oiaue aeo, iaeei aeo ia?eoaoa e aeaa noiiiauo aeoa. Ia/aei iaeaoa
aeaiiuo anaaaea ioia/aao ieceee o?iaaiue noa?oiaiai aeoa. Iinea iaai
neaaeoao 7 aeo aeaiiuo neiaiea eiaea ASCII. Aeo /aoiinoe niaea?aeeo 1
eee 0 oae, /oiau iauaa /enei aaeeieoe a 8–aeoiie a?oiia auei ia/aoiui.
Iineaaeiei ia?aaeathony aeaa noiiiauo aeoa, i?aaenoaaeaiiuo aunieei
o?iaiai iai?yaeaiey. Yeaeaaeaioiue OOE–neaiae i?e ia?aaea/a aoeau A
iieacai ia ?en. 2.

?en. 2. I?aaenoaaeaiea eiaea aoeau A neaiaeueiuie o?iaiyie OOE.

Oaeei ia?acii, iieiia aneio?iiii ia?aaeaaaaiia neiai ninoieo ec 11 aeo
(oaeoe/anee aeaiiua niaea?aeao oieueei 7 aeo) e caienuaaaony a aeaea
01000001011.

Eniieuecoaiua a eioa?oaena RS–232C o?iaie neaiaeia ioee/athony io
o?iaiae neaiaeia, aeaenoaothueo a eiiiuethoa?a. Eiae/aneee 0 (SPACE)
i?aaenoaaeyaony iieiaeeoaeueiui iai?yaeaieai a aeeaiaciia io +3 aei +25
A, eiae/aneay 1 (MARK) — io?eoeaoaeueiui iai?yaeaieai a aeeaiaciia io
–3 aei –25 A. Ia ?en. 3 iieacai neaiae a oii aeaea, a eaeii ii
nouanoaoao ia eeieyo TXD e RXD eioa?oaena RS–232C.

?en. 3. Aeae eiaea aoeau A ia neaiaeueiuo eeieyo TXD e RXD.

Naeaea o?iaiy, o.a. i?aia?aciaaiea OOE–o?iaiae a o?iaie eioa?oaena
RS–232C e iaiai?io i?iecaiaeeony niaoeeaeueiuie iee?inoaiaie ae?aeaa?a
eeiee e i?eaiieea eeiee.

Ia ?en. 4 i?aaenoaaeai oeie/iue iee?ieiiiuethoa?iue eioa?oaen RS–232C.
I?ia?aiie?oaiay iee?inoaia DD1 iineaaeiaaoaeueiiai aaiaea inouanoaeyao
ia?aeeaeueii–iineaaeiaaoaeueiua e iineaaeiaaoaeueii–ia?aeeaeueiua
i?aia?aciaaiey aeaiiuo. Iee?inoaiu DD2 e DD3 i?iecaiaeyo naeaea o?iaiae
aeey o?ao auoiaeiuo neaiaeia TXD, RTS, DTR, a iee?inoaia DD4 — aeey o?ao
aoiaeiuo neaiaeia RXD, CTS, DSR. Iee?inoaiu DD2 e DD3 o?aaotho
iai?yaeaiey ieoaiey (12 A.

?en. 4. Oeie/iay noaia eioa?oaena RS–232C.

Oniaa?oainoaiaaiey

?ac?aaioaii ianeieueei iiauo noaiaea?oia, iai?aaeaiiuo ia ono?aiaiea
iaaeinoaoeia ia?aiia/aeueiuo niaoeeoeeaoeee eioa?oaena RS–232C. N?aaee
ieo iiaeii ioiaoeoue eioa?oaen RS–422 (aaeainiay nenoaia, aeiioneathuay
eiiaaeain eeiee aei 50 Ii), RS–423 (iaaaeainiay nenoaia n ieieiaeueiui
eiiaaeainii eeiee 450 Ii) e RS–449 (noaiaea?o n aunieie nei?inoueth
ia?aaea/e aeaiiuo, a eioi?ii ianeieueei eciaiaiu ooieoeee noai e
i?eiaiyaony 37–eiioaeoiue ?acuai oeia D).

Oanoiaia iai?oaeiaaiea aeey eioa?oaena RS–232C

Niaaeeieoaee. Yoe aeaoaaua ono?ienoaa oi?iuatho ia?ae?anoiua niaaeeiaiey
neaiaeueiuo eeiee eioa?oaena RS–232C. Iie iau/ii iniauathony aeaoiy
?acuaiaie oeia D (eee eaioi/iuie eaaaeyie, eiathueie ?icaoeo e anoaaeo),
e ana eeiee i?iaiaeyony e oie iaeanoe, eoaea iiaeii anoaaeoue ia?aiu/ee.
Oaeea ono?ienoaa aeeth/athony iineaaeiaaoaeueii n eeieyie eioa?oaena
RS–232C, e caoai i?iaa?ythony ?acee/iua eiiaeiaoeee iiaeeeth/aiee.

O?ainoi?iaoi?u ?acuaia. Iau/ii yoe i?eniiniaeaiey eiatho ?acuai RS–232C
ni oou?ueeaie ia iaeiie noi?iia e ?acuai n ioaa?noeyie ia ae?oaie
noi?iia.

Ionoua iiaeaiu. Eae e i?aaeuaeouea ono?ienoaa, ionoua iiaeaiu
aeeth/athony iineaaeiaaoaeueii a o?aeo aeaiiuo eioa?oaena RS–232C. Eo
ooieoeee caeeth/athony a eciaiaiee neaiaeueiuo eeiee oaeei ia?acii,
/oiau i?aa?aoeoue DTE a DCE.

Eeiaeiua iiieoi?u. Iiieoi?u eiaeeoee?otho eiae/aneea ninoiyiey (a
oa?ieiao MARK e SPACE) iaeaieaa ?ani?ino?aiaiiuo neaiaeueiuo eeiee
aeaiiuo e eaeoe?iaaiey. N eo iiiiuueth iieueciaaoaeue iieo/aao
eioi?iaoeeth i oii, eaeea neaiaeu a nenoaia i?enoonoaotho e aeoeaiu.

A?acee. Yoe ono?ienoaa iaania/eaatho aeinooi e neaiaeueiui eeieyi. A
ieo, eae i?aaeei, niaiauaiu aiciiaeiinoe niaaeeieoaeae e eeiaeiuo
iiieoi?ia e, e?iia oiai, i?aaeoniio?aiu ia?aeeth/aoaee eee ia?aiu/ee
aeey niaaeeiaiey eeiee n iaieo noi?ii ono?ienoaa.

Eioa?oaeniua oanoa?u. Ii naiae eiino?oeoeee yoe ono?ienoaa ianeieueei
neiaeiaa i?aaeuaeoueo i?inouo ono?ienoa. Iie iicaieytho ia?aaiaeeoue
eeiee a ninoiyiey MARK eee SPACE, iaia?oaeeaaoue iiiaoe, ecia?youe
nei?inoue ia?aaea/e aeaiiuo e eiaeeoee?iaaoue no?oeoo?o neiaa aeaiiuo.

Eniieueciaaiiay eeoa?aoo?a

Ooee I. Ni?aai/iia iiniaea ii oeeo?iaie yeaeo?iieea: Ia?. n aiae. — I.:
Yia?aiaoiiecaeao, 1990.

Ni?aai/iee i?ia?aiienoa e iieueciaaoaey/ Iiae ?aae. A. A. Oaa/eea, O. A.
Aeaiueyieiaa. — I.: “Eaa?oa”, 1993.

PAGE

PAGE 10

___

___

___

___

DD1

8251

DSR

CTS

RXD

DTR

RTS

TXD

C/D

RES

CS

D0

D6

D1

D2

D3

D4

D5

D7

RD

WR

CLK

0

SG

(eiioaeo 7)

0

Ae?aeaa?

eeiee

2×75150

I?eaiiee

eeiee

75154

+5A

+12A

–12A

3

DD4.1

17

DD4.2

22

DD4.3

RXD

(eiioaeo 3)

DSR

(eiioaeo 6)

CTS

(eiioaeo 5)

19

DD2

23

DD3.1

24

DD3.2

TXD

(eiioaeo 2)

DTR

(eiioaeo 20)

RTS

(eiioaeo 4)

27

7

28

1

2

5

6

8

11

13

10

21

20

12

SIO

RES

D0

D6

D1

D2

D3

D4

D5

D7

RD

WR

CLK

A0

26

+5A

4

Noa?oiaue aeo

Iaeanoue iaii?aaeaeaiiinoe

Eia. 1

(MARK)

+3 A

0

-3 B

Eia. 0

(SPACE)

Aeo /aoiinoe

Naiue aeo aeaiiuo

Aeaa noiiiauo aeoa

-25 A

+25 A

Aeo /aoiinoe

Noa?oiaue aeo

0

1

0

0

0

0

1

0

1

1

0

Aeaa noiiiauo aeoa

Naiue aeo aeaiiuo

0

+5A

STXD

TC

SRXD

RC

DCR

SRTS

DTR

SQ

RI

DRS

TC

Ia iacia/ai

No?aeeaie iieacaiu iai?aaeaiey

neaiaeia aeey DTE

FG

TXD

RXD

RTS

CTS

DSR

SG

DCD

Ca?aca?ae?iaai

Ca?aca?ae?iaai

Ia iacia/ai

SDCD

SCTS

14

15

16

17

18

19

20

21

22

23

24

25

1

2

3

4

5

6

7

8

9

10

11

12

13

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