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Sci.Electronics.Basics -> Google Groper needs help choosing MCU
There are 7 messages in this thread.
You are currently looking at messages 1 to 7.
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Author: Bearded OccamDate: 19:05 26-04-08
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Hopefully this is the last time I use Google Gropes. You guys are
right. Yeesh. Sorry about this.
I have used PIC chips for well over a decade, and in particular, have
developed circuits using the PIC16C773 due to the 12-bit ADC.
Everything would be rosy with the '773, except that I fried my two
windowed chips, they are no longer stocked by DigiKey or Mouser, and
it just seems like I could modernize a bit with an MCU that supports,
among other things:
* 12-bit ADC
* Serial port
* EEPROM or Flash, instead of EPROM / OTP
* Low pin count packages that a geezer can solder -- does not have to
be DIP necessarily
* Free software tools, possibly even C compiler
* Relatively painless programmer hardware
Another option would be to use one of the flash-based PIC chips and
switch to an outboard ADC, if the collective wisdom favored such a
route.
Thanks in advance for letting me use GG one last time, and for any
wisdom you are willing to share.
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Author: Tim WescottDate: 19:19 26-04-08
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On Sat, 26 Apr 2008 16:05:33 -0700, Bearded Occam wrote:
> Hopefully this is the last time I use Google Gropes. You guys are right.
> Yeesh. Sorry about this.
>
> I have used PIC chips for well over a decade, and in particular, have
> developed circuits using the PIC16C773 due to the 12-bit ADC. Everything
> would be rosy with the '773, except that I fried my two windowed chips,
> they are no longer stocked by DigiKey or Mouser, and it just seems like
> I could modernize a bit with an MCU that supports, among other things:
>
> * 12-bit ADC
> * Serial port
> * EEPROM or Flash, instead of EPROM / OTP * Low pin count packages that
> a geezer can solder -- does not have to be DIP necessarily
> * Free software tools, possibly even C compiler * Relatively painless
> programmer hardware
>
> Another option would be to use one of the flash-based PIC chips and
> switch to an outboard ADC, if the collective wisdom favored such a
> route.
>
> Thanks in advance for letting me use GG one last time, and for any
> wisdom you are willing to share.
There are PIC18F parts with low pin counts and ADCs. Microchip gives
away their compiler (with optimizations turned off), and you're already
familiar with their line.
--
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com
Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html
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Author: JamieDate: 19:20 26-04-08
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Bearded Occam wrote:
> Hopefully this is the last time I use Google Gropes. You guys are
> right. Yeesh. Sorry about this.
>
> I have used PIC chips for well over a decade, and in particular, have
> developed circuits using the PIC16C773 due to the 12-bit ADC.
> Everything would be rosy with the '773, except that I fried my two
> windowed chips, they are no longer stocked by DigiKey or Mouser, and
> it just seems like I could modernize a bit with an MCU that supports,
> among other things:
>
> * 12-bit ADC
> * Serial port
> * EEPROM or Flash, instead of EPROM / OTP
> * Low pin count packages that a geezer can solder -- does not have to
> be DIP necessarily
> * Free software tools, possibly even C compiler
> * Relatively painless programmer hardware
>
> Another option would be to use one of the flash-based PIC chips and
> switch to an outboard ADC, if the collective wisdom favored such a
> route.
>
> Thanks in advance for letting me use GG one last time, and for any
> wisdom you are willing to share.
PIC's are nice for small things. The newer flash versions are also nice.
AVR's are in there some where with flat memory addressing..
The ATmega's are very nice and offer lots of goodies..
The 87c51 old stand by series are good along with the newer line etc..
89c51,52,54,58's ect...
There are many to select from.
http://webpages.charter.net/jamie_5";
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Author: Paul E. SchoenDate: 20:12 26-04-08
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"Bearded Occam" <BeardedOccam@gmail.com> wrote in message
news:bd25562d-f6f0-43d8-81e2-c347c00f1761@e53g2000hsa.googlegroups.com...
> Hopefully this is the last time I use Google Gropes. You guys are
> right. Yeesh. Sorry about this.
>
> I have used PIC chips for well over a decade, and in particular, have
> developed circuits using the PIC16C773 due to the 12-bit ADC.
> Everything would be rosy with the '773, except that I fried my two
> windowed chips, they are no longer stocked by DigiKey or Mouser, and
> it just seems like I could modernize a bit with an MCU that supports,
> among other things:
>
> * 12-bit ADC
> * Serial port
> * EEPROM or Flash, instead of EPROM / OTP
> * Low pin count packages that a geezer can solder -- does not have to
> be DIP necessarily
> * Free software tools, possibly even C compiler
> * Relatively painless programmer hardware
>
> Another option would be to use one of the flash-based PIC chips and
> switch to an outboard ADC, if the collective wisdom favored such a
> route.
>
> Thanks in advance for letting me use GG one last time, and for any
> wisdom you are willing to share.
Microchip does have some new products with 12 bit ADC:
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2018&mcpa
ram=en532100
The dsPIC family has had 12 bit ADC for a while:
http://ww1.microchip.com/downloads/en/DeviceDoc/70183A.pdf
The PIC24HJ series has a 12 bit ADC:
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDoc
Name=en520472
I was surprised that there was not a flash version of the PIC16C773, and
the similar PIC16C770/771 seems to be only available in OTP. But you can
order one of the windowed CERDIPs direct from Microchip, and get more by
Halloween:
http://www.microchipdirect.com/productdetails.aspx?mid=10&catalog=buymicrochip&c
ategory=PIC16C770
If you go with an external ADC, Microchip has some SPI SAR devices up to 13
bits:
http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=11021&mid=11&lang=
en&pageId=79
and Delta Sigma up to 22 bits:
http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=11022&mid=11&lang=
en&pageId=79
and dual slope to 17 bits with 3-wire or serial interface:
http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=11023&mid=11&lang=
en&pageId=79
BTW, I sent a couple dozen complaints to Google about the spam and porn,
and it seems to have abated for awhile. Direct your abuse complaints to:
http://groups.google.com/groups/abuse
Good luck,
Paul
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Author: Bearded OccamDate: 22:03 26-04-08
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On Apr 26, 7:12 pm, "Paul E. Schoen" <pst...@smart.net> wrote:
> "Bearded Occam" <BeardedOc...@gmail.com> wrote in message
>
> news:bd25562d-f6f0-43d8-81e2-c347c00f1761@e53g2000hsa.googlegroups.com...
>
>
>
> > Hopefully this is the last time I use Google Gropes. You guys are
> > right. Yeesh. Sorry about this.
>
> > I have used PIC chips for well over a decade, and in particular, have
> > developed circuits using the PIC16C773 due to the 12-bit ADC.
> > Everything would be rosy with the '773, except that I fried my two
> > windowed chips, they are no longer stocked by DigiKey or Mouser, and
> > it just seems like I could modernize a bit with an MCU that supports,
> > among other things:
>
> > * 12-bit ADC
> > * Serial port
> > * EEPROM or Flash, instead of EPROM / OTP
> > * Low pin count packages that a geezer can solder -- does not have to
> > be DIP necessarily
> > * Free software tools, possibly even C compiler
> > * Relatively painless programmer hardware
>
> > Another option would be to use one of the flash-based PIC chips and
> > switch to an outboard ADC, if the collective wisdom favored such a
> > route.
>
> > Thanks in advance for letting me use GG one last time, and for any
> > wisdom you are willing to share.
>
> Microchip does have some new products with 12 bit ADC:
>
> http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeI...
>
> The dsPIC family has had 12 bit ADC for a while:
>
> http://ww1.microchip.com/downloads/en/DeviceDoc/70183A.pdf
>
> The PIC24HJ series has a 12 bit ADC:
>
> http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeI...
>
> I was surprised that there was not a flash version of the PIC16C773, and
> the similar PIC16C770/771 seems to be only available in OTP. But you can
> order one of the windowed CERDIPs direct from Microchip, and get more by
> Halloween:
>
> http://www.microchipdirect.com/productdetails.aspx?mid=10&catalog=buy...
>
> If you go with an external ADC, Microchip has some SPI SAR devices up to 13
> bits:
>
> http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=11021&m...
>
> and Delta Sigma up to 22 bits:
>
> http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=11022&m...
>
> and dual slope to 17 bits with 3-wire or serial interface:
>
> http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=11023&m...
>
> BTW, I sent a couple dozen complaints to Google about the spam and porn,
> and it seems to have abated for awhile. Direct your abuse complaints
to:http://groups.google.com/groups/abuse
>
> Good luck,
>
> Paul
Wow. Thanks for such a comprehensive reply. And the 18F2458 seems like
it even has the same pinout as my 773, so it will be an easy
migration.
Meanwhile, reviewing my applications, I have to admit that I may be
fooling myself about the need for 12-bit resolution. Still, it's nice
to know that I am not stuck with EPROM.
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Author: Tom2000Date: 02:13 27-04-08
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On Sat, 26 Apr 2008 20:12:27 -0400, "Paul E. Schoen"
<pstech@smart.net> wrote:
>
>
>Microchip does have some new products with 12 bit ADC:
>
>http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2018&;
mcparam=en532100
>
Thanks, Paul. I've been using the 18F2431 for 28-pin projects for a
long time now. I wasn't aware of the 12 bit ADC nor the larger amount
of memory in the 18F2553. I think I'll put a few of those chips on my
shopping list for my next Microchip order.
Best,
Tom
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Author: Paul E. SchoenDate: 03:37 27-04-08
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"Tom2000" <abuse@giganews.net> wrote in message
news:0968149rqgvtbmc39a2kv9kpff5101hi5c@4ax.com...
> On Sat, 26 Apr 2008 20:12:27 -0400, "Paul E. Schoen"
> <pstech@smart.net> wrote:
>
>>
>
>>
>>Microchip does have some new products with 12 bit ADC:
>>
>>http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2018&
amp;mcparam=en532100
>>
>
> Thanks, Paul. I've been using the 18F2431 for 28-pin projects for a
> long time now. I wasn't aware of the 12 bit ADC nor the larger amount
> of memory in the 18F2553. I think I'll put a few of those chips on my
> shopping list for my next Microchip order.
Now, I just need to contact Microchip and arrange for my commission!
Glad to help. It's also information that I and others might be able to use.
Paul
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