6264 8K X 8bit Static Ram을 이용한 입출력(1)

<그림1>

 6264 A0~A13 주소핀중 A0~A3 4개 핀 D0~D7 입/출력핀 중 D0~D3 4개를 이용해 주소핀이 4개니 0x0~0xf번지 각 번지에 0번지면 0 1번지면 1 f번지면 f 넣기

NC는 not connect 연결할필요 없고 A0~A12 주소라인 I/O는 입출력라인 GND 그라운드 VCC 전원 WE는 write enable 램에 값을 입력할때 OE는 output enable인가? 램에 저장된 값을 출력할때 근데 bar(-)표시가 위에 붙어있는데  바표시가 없으면 High 레벨일때 있으면 Low 레벨일때 동작한다는 뜻이고 마지막으로 CE chip enable 두개 있는데 이 핀에 값이 들어와야 칩이 작동한다.

여기있는 CS chip select? 이건CE랑 같은걸 의미하고 CS1은 바가 있고 CS2는 없으니 씨에스1은 바로 그라운드에 연결하고 씨에스2는 인버터를 통해 연결한다

입 출력이 동시에 나올수 없으니깐 둘을 동시에 동작상태로 만들면 안된다. 그러니 한쪽은 풀다운 저항을 바로 연결하고 한쪽은 인버터를 거쳐 연결해서 둘이 동시에 선택되는걸 막고 보통때는 OE를 동작상태로 만들어서 출력이 항상나오게 하고 또 버튼을 브이씨씨에 연결해서 버튼을 누를때만 WE를 동작상태로 만들어 램에 값을 저장한다.

주소라인은 0~3까지 만 쓸거니깐 나머지는 그라운드에 연결하고 0~3은 풀다운저항에 연결해서 평소에는 0값이 들어오게 하고 DIP스위치 각 자리가 On되면 1이 되게한다.

입출력 라인은 출력값을 보기 위해서 LED에 연결하고 입력을 하기위해서 딥스위치를 연결하고 평소에는 입출력값이 0이 되게 하기위해서 풀다운 저항에 연결한다



전원부는 9v배터리를 사용할거니깐 레귤레이터를 써서 VIN은 배터리를 연결하고 VOUT에서 나온 5v를 전원으로 사용하고 컨덴서는 채터링을 방지하기 위해서 사용하는데 아직 이론적인 부분은 잘모르겠고 10uF으로 연결하라고 하던데...여까지 끝

굿모닝팝스2010 4월 30일(FRI)

Tag along if you don't want to miss out.
If someone go somewhere and you tag along, you go with them, when they have not asked you.
If you miss out on something that would be enjoyable or useful to you, you are not involved in it or do not take part in it.
Pick out three flavors for your sundae.
If you pick out someone or something, you choose them from a group of people or things.
If something is orange flavour or beef flavour, it is made to taste of orange or beef.
A sundae is a tall glass of ice cream with wipped cream and nuts or fruit on top.
Your mom will pass out when she hears the news.
If you pass out, you faint or collapse.
If you faint, you lose consciousness for a short time, especially because you are hungry, or because of pain, heat, or shock.

<UP>
Carl: Excuse me. Pardon me.
Old man coming through.
Teacher: Congratulations, Russell. sir.
Carl: Russel, for assisting the Elderly and for performing above and beyond the call of duty, I would like to award you the highest honor I can bestow.
The Ellie badge.
Duty is work that you have to do for your job.
To bestow something on someone means to give or present it to them.

<Bye Bye Love>
There goes my baby with someone new.
She sure looks happy, I sure am blue.
She was my baby till he stepped in.
Goodbye to romance that might have been.
If you step in, you get involved in a difficult situation because you think you can or should help with it
However, to  say that it is possible that something happened or was true in the past, we can use may/might have + past participle
-What was that noise? It might have been a cat.
can sometimes refer to the present or future.
-By the end of this year I might have saved some money.

We agreed to accept.
We agreed to change.
We agreed to disagreed.
We agreed to pay in full.
We agreed to discuss things.
If people discuss something, they talk about it, often in oreder to reach a decision.

I can't believe we agreed to pay in full.
Well, we're responsible to some extent.
I agreed, but it's too much.

When I get back to school, I'm going to study harder.
Now you're talking.

굿모닝팝스2010 4월 29일(THU)

Fire fighters put out the fire in 10 minutes flat.
If you put out a fire, candle, or cigarette, you make it stop burning.
Our company will branch out in the near future.
If a person or an organization branches out, they do something that is different from their normal activities or work.
Two tickets! Did we luck out or what?
If you luck out, you get some advantages or  are successful beacause you have good luck.

You just gave her away.
This is none of  my concern.
I didn't ask for any of this!
Master, it's alright.
I am not your master!
And if you hadn't shown up,

none of this would've happened!

Bad dog! Bad dog!
If you give away something that you own, you give it to someone, rather than selling it, often because you no longer want it.
If you ask for something, you say that you would like it.
To talk about past situation that did not happen, we use a past perfect tense int the if-clause, and would have+past participle in the other part of the sentence.
-If you had asked me, I would have told you.

Bye, bye, love.
Bye, bye, happiness.
Hello, loneliness.
I think I'm a gonna cry.

There's one thing i like.
There's one thing i hate.
There's one thing i know.
There's one thing i need.
There's one thing i believe.
I don't care about a lot of things.There's one thing i need.
Shoot! What is it?
All I want is a convertible.
What have you been doing lately?
I've been a temp for a tourist angency.
If you care about something, you feel that it is important and are concerned about it.
If you shoot the breeze or shoot the bull with someone, you talk to them about things which are not very serious or important.
A convertible is a car with a soft roof that can be folded down or removed.
A temp is a person who is employed by an agency that sends them to work in different offices for short periods of time, for example to replace someone who is ill on holiday.

굿모닝팝스2010 4월 28일(WED)

Before you pull out, look both ways.
When a vehicle or driver pulls out, the vehicle moves out into the road or nearer the center of the road.
I'm gonna duck out for a breath of fressh air.
If you duck out of something that you are supposed to do, you avoid doing it.
I'm not in the mood to stay out all night.


I always get chocolate and he gets Butter Brickle.
Then we sit on this one curb right outside,
and I count all the blue cars
and he counts all the red ones,
and whoever gets the most wins.
I like that curb.
That might sound boring,
but I think the boring stuff is the stuff I remember the most

Whoever means 'it doesn't matter who','any person who', or 'the unknown person who'.

-Whoever directed this film, it's no good.

-I'll marry whoever I like.

Interested, bored, excited etc say how people feel.

Interesting, boring etc describe the people or things that cause the feelings.

-I didn't enjoy the party because I was bored.

It was a terribly boring party.

Though I'm rather blind.

Love is a fate resigned.

Memories mar my mind.

Love is a fate resigned.

In informal speech, though is more common than although.

-Though I don't like him, I agree that he's a good manager.

Someone who is blind is unable to see because their eyes are damaged.

If you resign yourself to an unpleasant situation or fact, you accept it because you realize that you can't change it.

To mar something means to spoil or damage it.

That's what we need.

That's what we want.

That's what we have.

That's what we mean.

That's what we specialize in.

If you specialize in a thing, you know a lot about it and concentrate great deal of your time and energy on it, especially in your work or when you are studying or training. 

None of us thinks he is the best person.

Do you mean he's too young for this position?

Yeah! That's what we mean.

Well, I guess it's out of my hands now.

Don't give up, yet. 

If you give up something, you stop doing it or having it.

Not yet is used to say that something which is expected has not happened.

-The postman hasn't come yet.

Yet usually goes at the end of a clause, but it can go immediately after not in a formal style.

-The pears are not yet ripe.