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'[EE]: Serial to parallel'
2000\11\29@021208 by Nuri ERGINER

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Hi,
I need a simple and cheap chip for
converting serial data to 8 bit paralel data

example:

serial  01010101 -->  0
                     1
                     0
                     1
                     0
                     1
                     0
                     1

Regards,
Nuri Erginer

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2000\11\29@023304 by Eric Borcherding

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In a message dated 11/28/2000 11:14:23 PM Pacific Standard Time,
spam_OUTnerginerTakeThisOuTspamSSM.GOV.TR writes:

<< .....nerginerKILLspamspam@spam@SSM.GOV.TR (Nuri ERGINER) >>

Neri,
How about an old standard of the 7400 series world?
The 74HC164 or 74HC165 should do this job for 0.11$ in volume.
One is a PtoS the other is a StoP IC.

Eric

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2000\11\29@034433 by Nuri ERGINER

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thanks for your replay I will try to use it.

I have another question
Is it possible to drive a small pager motor from a PC's paralel port
without any extornal power supply?

Regards,
Nuri Erginer

{Original Message removed}

2000\11\29@063410 by Wojtek Zabolotny

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On Wed, Nov 29, 2000 at 02:22:30AM -0500, Eric Borcherding wrote:
> In a message dated 11/28/2000 11:14:23 PM Pacific Standard Time,
> nerginerspamKILLspamSSM.GOV.TR writes:
>
> << .....nerginerKILLspamspam.....SSM.GOV.TR (Nuri ERGINER) >>
>
> Neri,
> How about an old standard of the 7400 series world?
> The 74HC164 or 74HC165 should do this job for 0.11$ in volume.
> One is a PtoS the other is a StoP IC.
Sorry but 164 and 165 are good for parallel-> serial conversion, not
serial->parallel.
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2000\11\29@063425 by Wojtek Zabolotny

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On Wed, Nov 29, 2000 at 09:06:19AM +0200, Nuri ERGINER wrote:
> Hi,
> I need a simple and cheap chip for
> converting serial data to 8 bit paralel data
>
> example:
>
> serial  01010101 -->  0
>                       1
>                       0
>                       1
>                       0
>                       1
>                       0
>                       1
>
The 4094 chip will do the magic. Available eg. from Philips as 74HC4094.

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2000\11\29@072322 by Bob Ammerman

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Try a PIC :-)

Actually, a lot depends on the type of serial.

How do you detect where the bits start and end?

How do you detect where the bytes start and end?

How fast is the data stream?

Bob Ammerman
RAm Systems
(contract development of high performance, high function, low-level
software)

{Original Message removed}

2000\11\29@075501 by D Lloyd

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part 1 1936 bytes content-type:text/plain; charset=us-ascii
Hi,

Or do it with discretes......I seem to remember having to do a serial data
processor for an assignment at Uni.....that took the serial stream and
performed some math on it, then shoved some parallel data out.

To think I used to have an idea how to do things like that......! Where
does it all go to?

Dan





(Embedded     Bob Ammerman <EraseMERAMMERMANspam_OUTspamTakeThisOuTPRODIGY.NET>spam_OUTspamTakeThisOuTMITVMA.MIT.EDU>> image moved   29/11/2000 12:17
to file:
pic18455.pcx)





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Subject:  Re: [EE]: Serial to parallel

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Try a PIC :-)

Actually, a lot depends on the type of serial.

How do you detect where the bits start and end?

How do you detect where the bytes start and end?

How fast is the data stream?

Bob Ammerman
RAm Systems
(contract development of high performance, high function, low-level
software)

{Original Message removed}
part 2 165 bytes content-type:application/octet-stream; (decode)

part 3 144 bytes
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2000\11\29@090326 by Olin Lathrop

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> I need a simple and cheap chip for
> converting serial data to 8 bit paralel data

These things are called shift registers.


*****************************************************************
Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, RemoveMEolinTakeThisOuTspamembedinc.com, http://www.embedinc.com

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2000\11\29@092544 by Bond Peter S-petbond1

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> Sorry but 164 and 165 are good for parallel-> serial conversion, not
> serial->parallel.

The 164 data sheet I have in front of me suggests it is perhaps better
suited for serial in/parallel out operation?

Peter

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2000\11\29@094518 by David Kott

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> > Sorry but 164 and 165 are good for parallel-> serial conversion, not
> > serial->parallel.
>
> The 164 data sheet I have in front of me suggests it is perhaps better
> suited for serial in/parallel out operation?
>
> Peter

I agree with Peter.  The 74/54164 is a Serial In, Parallel Out shift
register.  Data is clocked in serially, and ends up on the parallel outputs.
This satisfies the original poster's request for Serial to Parallel
conversion.
A problem I can see with this IC, is there is no "update all outputs
uniformly" signal.  You will see the outputs change state as data gets
shifted across them before a bit reaches its final destination.  Not bad for
MMI's with a bank of LEDs, but not particularly suited for much else.

The '165, as noted, can do parallel to serial conversion.  I recently used
that very IC to read a bank of DIP switches, and save some precious PIC I/O
for other purposes.

-d

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2000\11\29@101057 by Alok Dubey

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use any demux and a counter to count 8 bits in case u cant count for 8
bits.. or if u have a clock.. then its even easier.
Alok


{Original Message removed}

2000\11\29@112134 by Jeszs

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I have used the 74HC595 shift register.

From your PIC:
1 line for serial output
1 line for clocking the serial output into the chip
1 line for parallel output latching

Voila, 3 outputs converted into 8, 16 or more number of outputs.
You may want to have an extra line for output reset.

--------------------
Jesús Gonzalo
León (SPAIN)
--------------------

2000\11\29@113441 by Robert Rolf

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You can do this with just two lines. A diode and RC on the
'595 load line coupled from the clock. Every clock low (dis)charges
the R/C. Once the clock stops, the RC charges up and trips past
the load threshold (or discharges if I've got the load polarity wrong).

We used this technique to built a 128 bit S/R for controlling a train
layout.

And if you want to be really clever you can do it all with just
ONE line by varying the down time of the clock and getting the
data from an R/C decay of the clock to data pin. (you need about
3:1 for data and 8:1 for load for good reliability)

Jeszs wrote:
{Quote hidden}

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2000\11\29@145852 by F. J. Andrew McDermott

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The 74HC595 is a shift register with serial IN and parllel OUT.  The
'595 is nice that it allows you to latch  the output with a REG clock so
it only changes after all the bits are clocked in place.  Additionally
the '595 has provision to cascade the chips.

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2000\11\29@222942 by Steve Landas

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how about just a serial to parallel shift register?
74hc594
74hc165 it think might be a 164.

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2000\11\30@015308 by Nuri ERGINER

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Let me explain What I want to do via serial to paralel converter.

What I want to do is a Propeller clock (mechanicaly scaned led clock)
which will work from computers serial port. The power to run a small motor
will also be taken from serial port.
7 led will be controled over serial port inorder to display the time which
will be send from PC's system clock.
You can take a look at the below url for getting information about
mechanicaly scaned clock.

http://www.bobblick.com/bob/projects/mclock/index.html

Any idea or shematics are welcome
Regards,
Nuyri Erginer


{Original Message removed}


'[EE]: Serial to parallel'
2000\12\01@143800 by Wojtek Zabolotny
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On Wed, Nov 29, 2000 at 02:25:47PM -0000, Bond Peter S-petbond1 wrote:
> > Sorry but 164 and 165 are good for parallel-> serial conversion, not
> > serial->parallel.
>
> The 164 data sheet I have in front of me suggests it is perhaps better
> suited for serial in/parallel out operation?
>
Ooops! I'm sorry for confusion. 164 is really good for serial->parallel,
however I prefer 4094 because it combines shift register together with
latch.
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