Keil Logo Arm Logo

Circuit diagram of MAX232 and 89C51

Next Thread | Thread List | Previous Thread Start a Thread | Settings

Details Message
Read-Only
Author
SM Zobi
Posted
15-Jul-2007 10:36 GMT
Toolset
C51
New! Circuit diagram of MAX232 and 89C51

HI

i need the circuit diagram of MAX 232 connection with 89C51 .Actually i want 89C51 TO COMMUNICATE serially with computer..PLZ help me out

Read-Only
Author
Per Westermark
Posted
15-Jul-2007 10:56 GMT
Toolset
C51
New! RE: Circuit diagram of MAX232 and 89C51

There are litterally thousands and thousands of examples of how to use a MAX232 directly available on the net. Have you spent any time looking for information?

Have you checked for schematics for sample boards that makes use of the 89C51? A serial port is so basic that all evaluation boards has serial port support!

Read-Only
Author
SM Zobi
Posted
15-Jul-2007 11:43 GMT
Toolset
C51
New! RE: Circuit diagram of MAX232 and 89C51

I have the MAX 232 pin connection diagram and 89C51 MC but i need the whole connection which pins from MC connected to MAX232 and from MAX 232 which are connected to serial port

Read-Only
Author
Per Westermark
Posted
15-Jul-2007 12:14 GMT
Toolset
C51
New! RE: Circuit diagram of MAX232 and 89C51

Since you not only are missing the information how to connect the 89C51 to the MAX232 but also how to connect the MAX232 to a D-Sub connector, you most definitely haven't spent a single minute looking for information yourself.

Finding out how to connect the 89C51 to the MAX232 shouldn't take many minutes more.

Unless you don't fancy google and wants someone else to google for you. Are you into distributed computing?

Read-Only
Author
Andy Neil
Posted
15-Jul-2007 14:45 GMT
Toolset
C51
New! Hint

I strongly susupect that every Keil board features a MAX232 (or equivalent)...

http://www.keil.com/boards/

Read-Only
Author
SM Zobi
Posted
15-Jul-2007 18:20 GMT
Toolset
C51
New! RE: Circuit diagram of MAX232 and 89C51

OK dude give me your e-mail id i am sending you the circuit diagram and tell me whether it is correct or wrong i hope you just stop talking and give me some help some sites name some circuit dig my email is givenchyl_05@yahoo.com

Read-Only
Author
Neil Kurzman
Posted
16-Jul-2007 04:07 GMT
Toolset
C51
New! RE: Circuit diagram of MAX232 and 89C51

Google Says:
http://www.pjrc.com/tech/8051/pm2_docs/hardware.html

Read-Only
Author
Andy Neil
Posted
16-Jul-2007 08:49 GMT
Toolset
C51
New! RE: Circuit diagram of MAX232 and 89C51

So now that you have it, do you understand it?

The connections of the capacitors are as shown in the Datasheet;

The logic-level transmit output from the 89C51 connects to the logic-level input of a transmitter in the MAX232;

The output of a transmitter in the MAX232 is RS232 - so that connects to the appropriate pin on your RS232 connector ('D'-type);

The input of a receiver in the MAX232 is RS232 - so that connects to the appropriate pin on your RS232 connector ('D'-type);

The logic-level output of a receiver in the MAX232 connects to the logic-level receive input of the 89C51.

It's really not rocket science!

Read-Only
Author
SM Zobi
Posted
20-Jul-2007 19:50 GMT
Toolset
C51
New! RE: Circuit diagram of MAX232 and 89C51

DUDE i am trying to watch the result on hyper terminal
can u send me any prog in assembley

Read-Only
Author
Per Westermark
Posted
20-Jul-2007 20:00 GMT
Toolset
C51
New! RE: Circuit diagram of MAX232 and 89C51

1) I need the schema to a ...
2) Can you send me any prog ...
3) Can you come and solder together the unit?
4) Can you come and flash my processor?
5) Can you write my report, so I can turn it in?

Read-Only
Author
erik malund
Posted
20-Jul-2007 20:51 GMT
Toolset
C51
New! you forgot

Per:

you forgot DUDE:

trevlig helg

Erik

Read-Only
Author
Per Westermark
Posted
20-Jul-2007 21:34 GMT
Toolset
C51
New! RE: you forgot

Ah, but I did look for earlier posts in the thread, but didn't find anyone named DUDE. However, it made me think about John Wayne - Duke.

Trevlig helg sjaelv!

(This forum doesn't support UTF-8 even if the encoding says UTF-8...)

Read-Only
Author
A. Poster
Posted
20-Jul-2007 22:08 GMT
Toolset
C51
New! RE: you forgot

Behold the future of engineering. Cheap, but clueless.

Read-Only
Author
Andy Neil
Posted
21-Jul-2007 00:25 GMT
Toolset
None
New! RE: can u send me any prog in assembley

"can u send me any prog in assembley"

What - any program?

Sure - here is something in some assembler:

ProgStart:
  call _flushallmenus
  call _runindicoff

LoadRoutine:
  ld hl,RoutineStart
  ld de,_alt_on_exec
  ld bc,200

  ld de,$28
  ld a,(_alt_on_exec)
  ld hl,_alt_on_chksum + $28
  add a,(hl)
  add hl,de
  add a,(hl)
  add hl,de
  add a,(hl)
  add hl,de
  add a,(hl)
  add hl,de
  add a,(hl)
  ld (_alt_on_chksum),a

  set 3,(iy + $23)
  ret

RoutineStart:
.org _alt_on_exec

  in a,(5)
  push af

  ld a,d
  out (5),a

  call _clrScrn
  call _homeup

  ld hl,TextToDisplay
  call _puts
  call _newline

  pop af
  out (5),a

  ret

Next Thread | Thread List | Previous Thread Start a Thread | Settings

Keil logo

Arm logo
Important information

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.