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PICList Thread
'[PIC] Sale on PB containing parts'
2006\02\02@095237 by William Couture

face picon face
I think Microchip is trying to clear out old inventory.

If you can use PB parts in your country, check them out.

http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2527&param=en025804

and

http://www.microchipdirect.com/LeadPromo.aspx

Bill

--
Psst...  Hey, you... Buddy...  Want a kitten?  straycatblues.petfinder.org

2006\02\02@105858 by Michael Rigby-Jones

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>-----Original Message-----
>From: spam_OUTpiclist-bouncesTakeThisOuTspammit.edu [.....piclist-bouncesKILLspamspam@spam@mit.edu]
>Sent: 02 February 2006 14:53
>To: Microcontroller discussion list - Public.
>Subject: [PIC] Sale on PB containing parts
>
>
>I think Microchip is trying to clear out old inventory.
>
>If you can use PB parts in your country, check them out.
>
>www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE
&nodeId=2527&param=en025804

and

http://www.microchipdirect.com/LeadPromo.aspx


Wow, I didn't realise the 16F54 parts were so cheap! 28p in single quantities in the UK.

Regards

Mike

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2006\02\02@121546 by Chetan Bhargava

picon face
With 0.75k of program flash is this device useful enough?

It would be a good starter device for the community college class
(mentioned earlier on piclist).


> Wow, I didn't realise the 16F54 parts were so cheap! 28p in single quantities in the UK.

--
Chetan Bhargava
Web: http://www.bhargavaz.net
Blog: http://microz.blogspot.com
Is this device useful

2006\02\02@152235 by Bill Freeman

flavicon
face
Chetan Bhargava writes re 16F54:
> With 0.75k of program flash is this device useful enough?
>
> It would be a good starter device for the community college class
> (mentioned earlier on piclist).

       Probably not.  It's a 12 bit part.  Dealing with the extra
addressing complexity, reduced instruction set, only 2 levels of call
stack, and not interrupts probably isn't how folks should begin.

                                                       Bill

2006\02\02@161012 by Wouter van Ooijen

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>> It would be a good starter device for the community college class
>> (mentioned earlier on piclist).
>
>        Probably not.  It's a 12 bit part.  Dealing with the extra
> addressing complexity, reduced instruction set, only 2 levels of call
> stack, and not interrupts probably isn't how folks should begin.

Of these features I think
- the reduced instruction set it not much of a problem,
- the addressing complexity is something I want my students to bite into
anyway, but
- only a 2 level stack discourages structuring your code, I don't like
that for PIC beginners.

So: indeed, better start with a 14-bit core (or maybe higher, depends on
your objectives).

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: http://www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: http://www.voti.nl/hvu


2006\02\02@203205 by Chetan Bhargava

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> So: indeed, better start with a 14-bit core (or maybe higher, depends on
> your objectives).

Absolutely agreed, it completely depends on objective. I was looking
at the LPC Demo Board lessons the other day and they were as simple as
blinking LED, running them into a pattern, de-bouncing switch, etc.

For simple lessons like these (of course not counting the ADC lessons)
I would say it is an OK device :-)

--
Chetan Bhargava
Web: http://www.bhargavaz.net
Blog: http://microz.blogspot.com

2006\02\02@205143 by William Chops Westfield

face picon face
On Feb 2, 2006, at 5:32 PM, Chetan Bhargava wrote:

[PIC16F54]

> blinking LED, running them into a pattern, de-bouncing switch, etc.
> For simple lessons like these I would say it is an OK device :-)
>
Well, sure.  It was the 16C54 that started all the PIC excitement
in the first place, after all.  You can do quite a bit with 512
words of program memory.  Isn't the original Basic Stamp squeezed
into a 16C54?  (although I suspect that was a rather impressive
feat of programming...)

BillW

2006\02\03@012106 by Chetan Bhargava

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If anyone from US is ordering pb devices, let me know offlist. I can't
justify $9.50+$5  (shipping+handling) for a few chips.

Regards,

--
Chetan Bhargava
Web: http://www.bhargavaz.net
Blog: http://microz.blogspot.com

2006\02\03@080400 by Larry G. Nelson Sr.

picon face
Under some cases the 54 is good for this. I have done projects where the students build a take home project and a source of cheap chips is great. Simple concepts like program flow, bit operations etc are still easy on this level of chip. For a general purpose do it all and keep reusing they may not be good choices but I still have a lot of products out there using the 16C54. Sometimes the elegance of coding is easier to teach with less resources. It all depends on what you are trying to do. I have taugh assy lang programming to 6th grade students in an after school club and it means a lot to that age groupp to have something to take home that they did. At that age they are kind of like us engineers ... loving our toys;)

Larry


---- Chetan Bhargava <cbhargavaspamKILLspamgmail.com> wrote:
{Quote hidden}

> --

2006\02\03@171721 by Peter

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On Thu, 2 Feb 2006, William Chops Westfield wrote:

> Well, sure.  It was the 16C54 that started all the PIC excitement
> in the first place, after all.  You can do quite a bit with 512
> words of program memory.  Isn't the original Basic Stamp squeezed
> into a 16C54?  (although I suspect that was a rather impressive
> feat of programming...)

It's not so hard. It's was a token threaded language so ... but the
newer stamp basics are not token threaded and would NOT fit in there.

Peter

2006\02\03@184831 by William Chops Westfield

face picon face
On Feb 3, 2006, at 2:17 PM, Peter wrote:

>>  Isn't the original Basic Stamp squeezed
>> into a 16C54?  (although I suspect that was a rather impressive
>> feat of programming...)
>
> It's not so hard. It's was a token threaded language so ... but the
> newer stamp basics are not token threaded and would NOT fit in there.

The interpreter on the PIC is written in a token threaded language as
well?  In particular, I remember a comment on the basic stamp list;
apparently someone didn't understand why parallax wasn't upset that
some PIC Book author had published assembly language routines to
implement each of the StampBasic language functions.  Some smiled
and mentioned that that was ok, cause they didn't all fit in a PIC
anyway...

2006\02\03@214104 by David VanHorn

picon face
>
>
> The interpreter on the PIC is written in a token threaded language as
> well?  In particular, I remember a comment on the basic stamp list;
> apparently someone didn't understand why parallax wasn't upset that
> some PIC Book author had published assembly language routines to
> implement each of the StampBasic language functions.  Some smiled
> and mentioned that that was ok, cause they didn't all fit in a PIC
> anyway...



Either way, what did they have to get upset about?

I did a similar thing for controlling a transmitter in a PIC, F84
16 commands like "Tune", "Beep",  "Delay"
I turned the bit-banged serial that I used to load the program into EE, into
an input pin and an output pin, and then used the state of the input pin to
control program flow with a "Skip" command. (Skip N commands if input is
active)

2006\02\04@141138 by Peter

picon face


On Fri, 3 Feb 2006, William Chops Westfield wrote:

{Quote hidden}

I don't know about that but the kind of (open source) basic that would
fit in a 16F84's internal EEPROM was certainly token-threaded. Almost 64
program steps ! Anyway extending this to an external EEPROM was trivial.
I suppose that the smilie (sp?) was from someone who had actual
knowledge of the implementation.

Peter

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