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I2C
Sci.Electronics.Design is a worldwide Usenet news group that is used to discuss various aspects of Electronic Circuit Design.
We found 64 threads matching "i2c"
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The most relevant threads are listed first
PIC question
2008-11-04 23:03:00
I am tired of writing bit-banger I2C pseudo-masters, so I looked for
PICs with I2C masters built-in. There seem to be very few. Do they
have to pay a license fee to someone to include a I2C master? Or does
it use a lot of silicon real estate? Or is it generally that PICs are
used in slave device...
I2C over long bus
Jon Slaughter - 2008-04-09 16:33:00
Anyone here familiar with using I2C over a long bus, say up to a few hundred
feet? Basically either using charge pumps and/or slower speeds(even < 1k
will work).
I know there are some driver chips(but quite expensive for what they do) and
I'm curious as to if there are any simple solutions...Re: DAC with GPIO?
2009-10-31 15:26:00
On Oct 31, 12:31 pm, Jan Panteltje wrote:
> On a sunny day (Sat, 31 Oct 2009 10:21:52 -0700 (PDT)) it happened
> a7yvm109gf...@netzero.com wrote in
> :
>
> > Just an idle thought. A serial I2C DAC with a 6 pin package needs
> > gnd,vcc,sda,scl,out. If you can select the I2C address ...Re: BV513 with A25L40PT
Kari Laine - 2009-12-12 08:47:00
Kari Laine wrote:
> Hi,
>
> I am trying to interface A25L40PT flash to BV513 (http://byvac.com)
> I am really new on this and therefore ask a stupid question.
>
> What is the address of A25L40PT? I have read the data sheet but cannot
> find it.
Stupid me. I2C has addresses SPI has c...I2C bus.
2009-05-05 15:14:00
This is a multi-part message in MIME format.
------=_NextPart_000_0158_01C9CD7B.0BA60170
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
http://standardics.nxp.com/literature/books/i2c/pdf/i2c.bus.specification=
.pdf
Bob
------=_NextPart_00...Re: Simulate a VGA monitor connected to a computer?
Tim Williams - 2009-07-16 16:23:00
"notme" wrote in message
news:0001HW.C684D86B00355604B08A39AF@news.eternal-september.org...
> Is this a case of I^2C communication? Any simpler method?
I think so. I can't get VGA from my laptop without I2C... when I try
forcing it, Windows drops the data line (request, I suppose) for a...Re: Video cable length compensator
Jan Panteltje - 2009-10-07 16:47:00
On a sunny day (Wed, 7 Oct 2009 14:57:08 -0500) it happened "amdx"
wrote in :
> I think he's driving cat5 cable.
> Mike
No no,
it is one of those ancient 4 core audio cables.
There is some screening, and it is sort of wrapped around each core,
but I think the term is 'partially...Is it me, or...
2008-05-14 16:47:00
There are more and more chips out there with three and four level
digital input pins?
Like the AD9514 for example.
Seems like a good trend, keeps the packages smaller, but then why not
just add a SPI or I2C interface?
...Re: Equipting a test bench
Rich Webb - 2009-09-26 14:05:00
On Sat, 26 Sep 2009 07:50:43 -0700, John Larkin
wrote:
> I've never used a logic analyzer. A digital scope can spot the obvious
> glitch-type errors, and all a LA does after that is force you to do
> the thinking you should have done in the first place. They take so
> much time to connect ...Atmega or PIC
Mr.G - 2009-02-26 02:18:00
Hi
I'm looking for a micro costing about $1-2 1000up pricing.
At least 13 I/O, of which 2 must be PWM capable, and it'd be nice to have
I2C on a pair too.
External interrupt on one input and operate from 3-5V.
Flash based (guess about 2k), EEPROM, and with some form of ISP. Dev tools
only ...Logic Analyzer Recommendations
tomcee - 2009-10-07 13:26:00
Hello:
Would anyone care to share their opinions on these logic analyzers?:
http://www.usbee.com/sx.html
http://www.saleae.com/logic/
They have limited capabilities, but are priced quite attractively.
My application is relatively slow speed and would like to analyz...Re: IRDA
aerelD - 2008-10-09 18:37:00
On Oct 9, 1:05=A0pm, "Kasper" wrote:
> Hello,
>
> I have added IRDA on one og my designs, but afterwards i figured out the
> ircomm is gone :(
>
> Can anyone come with a good/easy solution for getting data into the PC fr=
om
> my own uC?
>
> Kasper
You could use rs232 - if y...bit banged Basic52 code for 4-wire serial interface
Largo - 2007-12-30 14:49:00
Hi,
Can someone site location or post example code for a MAX6969 LED driver for
8052 project? I have the Max chip for driving LED's prototyping on a 8052
development board. It uses "industry standard" 4-wire serial interface
(SPI?). I have BASIC code for a I2C interface.
Largo
...Recommendations for new oscope for embedded development...
2009-05-04 13:12:00
Howdy electonics gurus,
I am currently evaluating a Tektronix MSO2024 ($5150 list, $4377 with
any trade-in). I love it. I am in desperate need of a new scope
anyway because there have been many, many times that my old analog
scope came up short because it couldnt "grab" sporadic events like I2...Re: What does glue-less or nearly glue-less means in processor interfacing
Martin Griffith - 2008-10-28 05:09:00
On Tue, 28 Oct 2008 00:22:39 -0700 (PDT), in sci.electronics.design
joebaghomian@gmail.com wrote:
> Hi
> What does glue-less or nearly glue-less means in processor
> interfacing?
> Thanks
It means that you generally don't need to add any more IC's , say a 74
logic gate, to interface with ot...Re: Little PICs with hi-res A-D ?
Scott Seidman - 2008-10-14 08:46:00
Eeyore wrote in
news:48F45665.A5C64205@hotmail.com:
> Me ? A PIC ? You must think I'm going mad !
>
> No, it's for someone else I may work on a project with and he's into
> PICs. He wants a little 8 pin jobbie with an onboard A-D. Currently he's
> looking at a 16F220 IIRC. That onl...Re: cool chart
Joel Koltner - 2009-07-28 20:36:00
"krw" wrote in message
news:f54v659bdn0dpu5gecp9jn6amibvaeaqv0@4ax.com...
> I was on the fence between Altera and Actel, but the support
> from Altera pushed them over the edge. I may still go to Actel down
> the road.
I've used small Altera CPLDs without any problems, but not any of ...Re: Optocoupler question: Why is my rise time so high?
2008-02-23 12:20:00
> Is this thehttp://en.wikipedia.org/wiki/Breadboardtype breadboard ??
>
> With so few pins, you could solder wires to the opto pins and check if
> its the breadboard causing your problems, which I suspect it is.
Yes, it's a similar style breadboard.
I actually put this breadboard c...Re: 7 segment driver
richard.rowell@gmail.com - 2008-06-03 14:56:00
On Jun 3, 3:31=A0am, "David L. Jones" wrote:
> On Jun 3, 4:04 pm, "richard.row...@gmail.com"
>
> wrote:
> > Is there a 7-segment LED driver IC that will do 0-F, preferably with a
> > latch? =A0Every chip I find is BCD and only does 0-9.
>
> > TIA!
>
> I almost hate to say ...Re: How hard is it to drive a 3-ph brushless motor?
2009-12-15 18:10:00
Peter writes:
> The thing which concerned me with a brushless motor is that in the
> standard driver chip implementation the rpm is totally open loop.
If you have the inclination, replace the "standard driver chip" with a
small MCU. The R8C family has many chips with built-in three-pha...Re: PIC as temperature sensor, some code
Jan Panteltje - 2009-08-10 14:47:00
On a sunny day (Mon, 10 Aug 2009 19:07:08 +0200) it happened Frank Buss
wrote in :
> Jan Panteltje wrote:
>
> > This is the one guys, it gives you the option to set
> > the temp alert in degrees C or in timer counts.
> > and it also displays the temp in degrees C.
> > ftp://pante...logic generator
2009-10-20 19:48:00
Is there a device like a "reverse" logic analyzer? Say 30 outputs and
I can program what shows up on each pin in time?
Suppose I want to shift out 288 bits on a SPI style setup at 30MHz,
then generate a few 10ns strobe signals on other lines.
I have a few gizmos like the Aardvark that let me gen...Re: Looking for Microcontroller Recommendations
Jan Panteltje - 2010-01-19 07:08:00
On a sunny day (Mon, 18 Jan 2010 20:52:10 GMT) it happened nico@puntnl.niks
(Nico Coesel) wrote in :
> >
> > No, this is true, why bother with ARM when you can get a good small mobo for >
> > http://www.alternate.nl/html/product/Moederborden_Socket_441/ASRock/A330GC/-1079713/?tn=HARDWAR...USB multifunction instruments
2008-10-13 15:20:00
Hello to all,
I'm looking for an USB device with these features:
- powered from USB
- oscilloscope: dual trace, 100 MHz BW, usual trigger options (edge,
impulse, video, ext). Some raw analysis: frequency, mean, rise time,
time measurement, FFT, ecc
- logic analyzer: 8 ch, 60 MHz, common pr...Re: power supply for embedded PC
Ben Jackson - 2008-11-12 15:25:00
On 2008-11-11, John Larkin wrote:
>
> and we need a power supply, something like...
>
> http://www.meanwell.com/search/ipc-200/default.htm
Make sure you get something with fan speed control (either automatic or
with some kind of I2C interface to the PS monitoring). The 40mm fans in
...Re: Oscilloscopes
Rich Webb - 2010-02-08 08:53:00
On Mon, 8 Feb 2010 06:05:19 -0600, "RogerN" wrote:
> Lot of good info there, thanks. I have a 10mhz leader single trace scope
> that worked fine last time I tried it. Do you have any recommendations on a
> used repairable scope? I've seen some recommend the Techtronics 465, since
> a ...Re: Hi-Tech Software bought by Microchip - no more other compilers
larwe - 2009-07-10 14:05:00
On Jul 10, 12:36=A0pm, n...@puntnl.niks (Nico Coesel) wrote:
> > That's absolutely untrue, starting with the difference between double-
> > and single-buffered UARTs, buffered vs. non-buffered PWM peripherals,
>
> Perhaps but -for instance- all UARTs work the same. Provide some
Hardly! ...Re: touchscreen interfacing
Jamie Morken - 2008-06-13 01:15:00
mkaras wrote:
> On Jun 12, 8:42 pm, Jamie Morken wrote:
> > Hi,
> >
> > I have a resistive touchscreen with Y-, X-, Y+, and X+ pins, what is the
> > standard way to interface this to a microcontroller or FPGA?
> >
> > cheers,
> > Jamie
>
> Look up the UCB1400 at the NXP (Phil...Hope HP01D barometric sensors
Den - 2008-04-16 09:09:00
Anyone used the Hope HP01D or HP03D barometric pressure sensors?
They seem to have resonable specifications for their low cost - I wondering
what if any shortfalls I am overlooking.
http://www.hoperf.com/pdf/HP01D.pdf
http://www.hoperf.com/pdf/HP03.pdf
From the manufacturers site:
a...Re: 3.3V-5V level shifters
Jon Slaughter - 2008-09-25 18:16:00
"Joerg" wrote in message
news:hVACk.1362$Ws1.1079@nlpi064.nbdc.sbc.com...
> What's the jelly-bean level shifter du jour, the most popular?
>
> Need to shift three sigs 3.3V to 5V and another three 5V to 3.3V. Stuff us
> analog dudes normally don't do. The TXB0104 looks ok, so does th...Re: another board
Jan Panteltje - 2009-10-20 16:51:00
On a sunny day (Tue, 20 Oct 2009 13:06:16 -0700) it happened John Larkin
wrote in
:
>
> Our designs are getting increasingly FPGA-centric, and it usually
> doesn't make sense to partition a design into multiple chips, so the
> ball counts keep going up and the PCB routing gets nastier ...Re: Phone camera candidates? (MCU-if)
Brendan Gillatt - 2008-12-23 07:39:00
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
valwn@silvtrc.org wrote:
> Any mobile phones that have an easy to interface camera that is worthwhile to
> rip from an otherwise broken/old unit ..?
>
> I'm looking for 640 x 480 , 6 bpp still images sensors or better. That can
> interface...Re: MCU boards
2007-12-22 13:52:00
Marco Trapanese writes:
> Hi,
>
> I have to choice an MCU for an automotive project. I'm looking for
> something like Rabbit Core Modules, with the following features:
>
> + C-support
> + IDE available for free or at low-cost
> + download firmware through a serial port
> + a...Re: eeprom data protection
Frank Buss - 2008-12-19 15:15:00
Enzo wrote:
> I have boards that use eeprom NM24C16.
> Sometimes, after a time period, data written in factory is lost.
> Write pin (7) is connected to a micro.
> I think that noisy environement is the problem.
>
> Someone know if exist a pin to pin eeprom less sensitive to noise?
> ...Re: Book recommendation?
Rich Webb - 2009-04-08 13:48:00
On Wed, 8 Apr 2009 10:14:50 -0700 (PDT), jjsavage@gmail.com wrote:
> Hi all,
> Can anyone recommend a good book about how to connect different
> chips from different manufacturers into a single device? E.g., an
> RFID reader from TI, a microprocessor from Intel, and a wireless
> transce...Basic advance question - design of photodiode amplifiers
Charlie E. - 2009-04-23 13:27:00
Hi All,
Just posing a little question on the design of photodiode amplifiers.
It is interesting how, so often, when you look into doing something
you haven't done before, you run into interesting bits of 'common
knowledge' that you don't know, and have a hard time finding!
In this case, I am ...Re: Job Description
Jim Thompson - 2008-03-29 11:31:00
On Sat, 29 Mar 2008 11:10:05 -0400, Fred Bloggs
wrote:
>
>
> Jim Thompson wrote:
> > [snip]
> >
> > Here is an example of the BS I'm objecting to...
> >
> > http://www.designers-guide.com/
> >
> > It's EDA BS implying you can design without knowing your ass from a
> > h...Re: Non-linear functions ...
krw - 2009-11-25 12:57:00
On Wed, 25 Nov 2009 10:30:08 -0700, Jim Thompson
wrote:
> On Wed, 25 Nov 2009 11:20:41 -0600, John Fields
> wrote:
>
> > On Tue, 24 Nov 2009 15:23:24 -0800, Rich Grise
> > wrote:
> >
> > > On Tue, 24 Nov 2009 15:30:47 -0600, Tim Wescott wrote:
> > > > On Tue, 24 Nov 2009 22:19...Re: Seeking recommendations for USB DAQ on Linux
2008-04-14 05:39:00
On 11 apr, 22:39, Julian Vrieslander
wrote:
> I'm looking for a simple data acquisition interface that will run on a
> Linux PC (Fedora Core 6). The requirements are very simple: 24 bits of
> digital output. We need to be able to flip single bits or groups of
> bits without causing gli...Re: LCD interfaces
-vinnie- - 2010-03-01 11:51:00
On Feb 26, 4:16=A0pm, D Yuniskis wrote:
> Hi Dimiter,
...........
> Yes. =A0In my case, I want to put all of the display interface on a
> small board (LCD interface, backlight, touchpanel, etc.). =A0So,
> if I end up with a panel that has LED backlighting, I need
> to have provisions f...