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'i - 16F877 samples ii - PIC 18xxx info'
1999\05\18@083403 by Russell McMahon

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Imre,

Did you find a source of 16F877?
I went to a Microchip seminar today (in New Zealand ) and they were
handing out what they said were alpha-versions of the chip one per
attendee.

Code on top is 9915B3P - how old is that (where'd I put that recent
release re new date codes :-))

They also discussed the coming PIC 18xxx family - presumably they
have been doing this at other meeting recently. If not then I suppose
I will be inundated. I haven't looked at the MChip website lately -
is information on this new line generally available?




Russell McMahon

From: Dr. Imre Bartfai <spam_OUTrootTakeThisOuTspamPROF.PMMF.HU>
Date: Thursday, April 29, 1999 6:17 PM
Subject: 16F877 delay (?)


>Hi there,
>
>the Hungarian distributor of Microchip has implicitly stated they
can
>deliver 16F877 earliest at June. Can someone share his/her
experiences?
>I'm waiting for this chip in a very intensive way because of I'm fed
up
>with the UV-erase - reprogram - test cycle.
>
>Thank you in advance
>Imre
>

1999\05\18@101631 by Scott Dattalo

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On Tue, 18 May 1999, Russell McMahon wrote:

> They also discussed the coming PIC 18xxx family - presumably they
> have been doing this at other meeting recently. If not then I suppose
> I will be inundated. I haven't looked at the MChip website lately -
> is information on this new line generally available?

This is going to be a really neat part. There is no information about on
the Web site just yet. My understanding is that the official data sheet
will be released in July along with the official announcement of the part.
I asked for a preliminary data sheet (after the FAE at the mchip seminar
said that they're available) but was denied the request (after the mchip
internal guys said no way til July). Bummer. But as a consolation, I did
get a copy of the instruction set details (e.g. opcodes). gpasm will
hopefully have support for the 18Cxxx hopefully soon after the part is
officially announced. BTW, If you ask someone at mchip, maybe you can get
the instruction set too. Please don't ask me because I can't give it to
you...


Scott

1999\05\18@113121 by Darrel Johansen

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    Scott wrote:

    >... BTW, If you ask someone at mchip, maybe you can get the
    >instruction set too. Please don't ask me because I
    >can't give it to you...

    You might want to check out the new MPASM User's Guide or the MPASM
    Quick Reference Card... ;-!

    Darrel

1999\05\19@032326 by g.daniel.invent.design

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Darrel Johansen wrote:
>
>      Scott wrote:
>
>      >... BTW, If you ask someone at mchip, maybe you can get the
>      >instruction set too. Please don't ask me because I
>      >can't give it to you...
>
>      You might want to check out the new MPASM User's Guide or the MPASM
>      Quick Reference Card... ;-!
>
>      Darrel

I guess Scott D is wearing the uChip logo as a tatoo on his ***

1999\05\19@085316 by Andres Tarzia

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The "9915" code refers to "Year 99", "Week 15" that is, near the end of
April.
I don't know about the "B3P" suffix.

Regards,
Andres Tarzia
Technology Consultant, SMART S.A.
e-mail: .....atarziaKILLspamspam@spam@smart.com.ar

-----Original Message-----
From: Russell McMahon [apptechspamKILLspamCLEAR.NET.NZ]
Sent: Tuesday, May 18, 1999 04:39
To: .....PICLISTKILLspamspam.....MITVMA.MIT.EDU
Subject: i - 16F877 samples ii - PIC 18xxx info

[...content deleted...]

Code on top is 9915B3P - how old is that (where'd I put that recent
release re new date codes :-))

[...content deleted...]

Russell McMahon

1999\05\19@163711 by roblid

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I did notice Arrow.com (US- site) had a price listed for 877 but
no availability. Depending on speed etc around US $11-13.

Thats about $23NZ which makes the AVR look damn attractive, even
with new programmer etc. I was quoted about $4.70NZ for the
2313.

1999\05\21@123131 by Andy Kunz

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At 09:55 AM 5/19/99 -0300, you wrote:
>The "9915" code refers to "Year 99", "Week 15" that is, near the end of
>April.
>I don't know about the "B3P" suffix.

Rev level of silicon in Plastic case.

I have a B2 rev, so you're one up on me.

I'm surprised you got a chip w/o docs.  Mine came with them.

Andy

==================================================================
  Montana Design Tech Support - http://www.montanadesign.com
==================================================================

1999\05\24@043214 by Tom Handley

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  Andy, as I understand things, you sent Carl (Carmacon) one of your
first samples? And, those chips had a problem with EEPROM? I contacted
Carl about the current status and I still have the rev B022 firmware.
He was going to send rev B024 but I've been waiting for 16F877 samples
to do some beta testing with the current firmware. I did not put in a
sample request until four weeks ago, hoping I would get current silicon.
My rep warned me that they were in short supply. They usually send
samples within a week. I did get the data book. What Carmacon firmware
revision are you using?

  - Tom

At 11:45 AM 5/21/99 -0400, Andy Kunz wrote:
{Quote hidden}

1999\05\24@105910 by Andy Kunz

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>   Andy, as I understand things, you sent Carl (Carmacon) one of your
>first samples? And, those chips had a problem with EEPROM? I contacted

Yes, and I have it back now.

>samples within a week. I did get the data book. What Carmacon firmware
>revision are you using?

B024 with 1.25f driver.  That might not be the latest driver - I use a
variety of machines and sometimes things don't get distributed to all them
properly.

Andy
==================================================================
  Montana Design Tech Support - http://www.montanadesign.com
==================================================================

1999\05\25@104745 by Tom Handley

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  Andy, thanks. My rep says the samples should be here soon but no
idea on what rev... I'll ask Carl to send the B024 update. Did you
have any problems with the 16F8xx and B024 firmware other than EEPROM?
The reason I've held back on both the samples and the firmware update
is that I need to move some 16C77 code to the 16F877 and it's 12-Bit
A/Ds for use in a DAQ system and I want to store calibration data in
EEPROM. It looks like I'll have plenty of time for my garden until I
get my `paws' on updated silicon...

  BTW, have you used the 16F877's 12-Bit A/D? I'm replacing an existing
design that used an external 12-Bit A/D and a precision 4.096V reference
with a pot to provide a 1mv resolution. I'm tempted to go back to a MAX186
A/D with it's internal reference and the data book `reference adjust'
circuit. I used that in my weather station several years ago and it's been
very accurate. That's my concern with the 16F877. Given a precision
reference, I wonder if I can get a similar accuracy. However, it would be
nice to eliminate the pot, external A/D, and allow the user to enter
calibration data to EEPROM.

  - Tom

At 10:55 AM 5/24/99 -0400, Andy Kunz wrote:
{Quote hidden}

1999\05\25@122355 by Andy Kunz

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>have any problems with the 16F8xx and B024 firmware other than EEPROM?

The version of chip I have has known problems writing.  I have several
copies of the 877 programming spec also, with different timings <G>.

The current version uses, I believe, '84 mode to burn the 877.  SLow but at
least it meets all the varieties of spec from Mchip.

>   BTW, have you used the 16F877's 12-Bit A/D? I'm replacing an existing

Only in 8-bit mode (that is, shifted so the LSbits are somewhere else and
don't get used.  This is the default mode, btw).

>very accurate. That's my concern with the 16F877. Given a precision
>reference, I wonder if I can get a similar accuracy. However, it would be

I would try it, but not get my hopes up.  They've never been too good on
the analog side of things.

Andy

==================================================================
  Montana Design Tech Support - http://www.montanadesign.com
==================================================================

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