Шпаргалка по "Схемотехнике управляющих систем"

Автор работы: Пользователь скрыл имя, 21 Января 2014 в 16:02, шпаргалка

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Работа содержит ответы на вопросы для экзамена (зачета) по "Схемотехнике управляющих систем"

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17. Мультиплексор.  Определение. Структурная схема включения мультиплексора в линию связи. Таблица истинности. Схема реализации.

Мулт-р - многовходовая комбин-ия схема  с 1им входом,обесп-т передачу сиг-в,поступ-х  с неск-х вход-х линий в 1у  вых-ую линии связи.

Схема включения мультиплексора в линию связи: 

Dn, Dn-1,…,D1-инф-онные входы

Ак-1,…,А0-адресные входы(управ-щие селекторные входы). 

мульт-р-коммутатор.

2к=n «из n в 1»

рассм-м описание мульт-ра на примере  «из 4 в 1»

а1 а0

D0 D1 D2 D3

F

00

01

10

11

1000

0100

0010

0001

X0

X1

X2

X3


Xi={0,1}

а1 а0

F

00

01

10

11

X0

X1

X2

X3


логич-ое Ур-ние для вых.функции

F=X0 +X1+X2+X3


F=a1 a0 D0+ a1 a0 D1+ a1 a0 D2 +a1 a0 D3= a1 a0 D0* a1 a0 D1* a1 a0 D2 *a1 a0 D3


схема реализации в базисе И-НЕ:

 

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     

56. М/сх прогр-емых ПЗУ заводом изготовителем. Структура м/сх.

ПЗУ однократно прог-ые заводом изготовителем по м-ду фотошаблона или маски(масочные ПЗУ-ПЗУМ ROM) д/хранения пост-ой инф-ии.

К155РЕ21-преобр-ль двоич-ого кода в код букв русского алф-та.

К155РЕ22- преобр-ль двоич-ого кода в код знаков лат.алф-та.

Струк-ра состоит из след.блоков:

1 матрица Эл-тов памяти,

2 дешиф-р адреса,

3 вых-ые ус-ми,

4 уст-во упр-я.

Стр-ная схема ПЗУ:

 

УГО   инф-онная ёмкость 28*4=1Кбит

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

57. М/сх однократно прог-ые ПЗУ польз-ем. Эл-т памяти. Структура м/сх. УГО.

М-ом пережигания плавких перемычек. ППЗУ-PROM.

На Перес-ии гориз. и верт.линий  в матрице на накопителе наход-ся Эл-ты с плавкой перемычкой.

В зависимости отвых-х усилит-ей(вых.ус-ли могут быть с прямым или инверс-м вых-м) в матрице накоп-ля записаны: 1 или 0.

Процесс прог-ия  свод-ся к пережиганию  плавких перемычек.

УГО на примере  м/сх КР556РТ5:

 

UPR-напреж-е прогр-ия.

инф-онная  ёмкость 29*8=4Кбит=512 байт.


32,38,39,40,45,46.doc

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36-37,29-31.doc

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41,42,43,44.doc

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9,10,11,12,34.doc

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ВОПРОСЫ ПО КУРСУ.doc

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