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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 82 threads matching "i2c"

You are looking at page 1 of 3.

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...PIC question

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...I2C over long bus

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: DAC with GPIO?

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...Re: BV513 with A25L40PT

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...I2C bus.

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: Simulate a VGA monitor connected to a computer?

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...Re: Video cable length compensator

Re: Bidirectional logic level shifting from positive to negative supply

krw@att.bizzzzzzzzzzzz - 2010-08-25 00:09:00
On Tue, 24 Aug 2010 20:55:38 -0700, John Larkin wrote: > On Tue, 24 Aug 2010 22:38:19 -0500, "krw@att.bizzzzzzzzzzzz" > wrote: > > > On Tue, 24 Aug 2010 20:25:56 -0700, John Larkin > > wrote: > > > > > On Tue, 24 Aug 2010 10:36:38 -0700 (PDT), "keithw86@gmail.com" > > > wrot...Re: Bidirectional logic level shifting from positive to negative supply

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? ...Is it me, or...

Which multi-PIC mid-range comms protocol?

Grant - 2010-08-10 19:43:00
Hi there, Used up all the good resources of a PIC16F886 to make a high resolution ADC (well, soon to be built, but gone through all the required PIC resource allocation), now I need to talk to another 16F886 (28pin) or 16F887 (40pin) PIC for RTC (32kHz watch xtal) and system control. Th...Which multi-PIC mid-range comms protocol?

Re: Bidirectional logic level shifting from positive to negative supply

John Larkin - 2010-08-24 23:55:00
On Tue, 24 Aug 2010 22:38:19 -0500, "krw@att.bizzzzzzzzzzzz" wrote: > On Tue, 24 Aug 2010 20:25:56 -0700, John Larkin > wrote: > > > On Tue, 24 Aug 2010 10:36:38 -0700 (PDT), "keithw86@gmail.com" > > wrote: > > > > > On Aug 23, 2:39 pm, John Larkin > > > wrote: > > > > On ...Re: Bidirectional logic level shifting from positive to negative supply

Re: Bidirectional logic level shifting from positive to negative supply

krw@att.bizzzzzzzzzzzz - 2010-08-24 23:38:00
On Tue, 24 Aug 2010 20:25:56 -0700, John Larkin wrote: > On Tue, 24 Aug 2010 10:36:38 -0700 (PDT), "keithw86@gmail.com" > wrote: > > > On Aug 23, 2:39 pm, John Larkin > > wrote: > > > On Sun, 22 Aug 2010 20:54:54 -0700, John Larkin > > > > > > > > > > > > wrote: > > >...Re: Bidirectional logic level shifting from positive to negative supply

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 ...Atmega or PIC

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...Logic Analyzer Recommendations

Re: Blue LED at 3.3V

Jan Panteltje - 2010-05-26 06:10:00
On a sunny day (Tue, 25 May 2010 19:40:25 -0700) it happened John Larkin wrote in : > On Tue, 25 May 2010 12:16:10 -0700, Tim Wescott > wrote: > > > On 05/25/2010 11:27 AM, Tim Wescott wrote: > > > On 05/25/2010 11:00 AM, John Larkin wrote: > > > > On Tue, 25 May 2010 10:18:11 -...Re: Blue LED at 3.3V

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...Re: IRDA

Re: Bidirectional logic level shifting from positive to negative supply

keithw86@gmail.com - 2010-08-24 13:36:00
On Aug 23, 2:39=A0pm, John Larkin wrote: > On Sun, 22 Aug 2010 20:54:54 -0700, John Larkin > > > > wrote: > > On Sun, 22 Aug 2010 18:36:38 -0700 (PDT), dagmargoodb...@yahoo.com > > wrote: > > > > On Aug 22, 8:11=A0pm, Jim Thompson > > Web-Site.com> wrote: > > > > On M...Re: Bidirectional logic level shifting from positive to negative supply

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 ...bit banged Basic52 code for 4-wire serial interface

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...Recommendations for new oscope for embedded development...

Re: Bidirectional logic level shifting from positive to negative supply

John Larkin - 2010-08-24 23:25:00
On Tue, 24 Aug 2010 10:36:38 -0700 (PDT), "keithw86@gmail.com" wrote: > On Aug 23, 2:39 pm, John Larkin > wrote: > > On Sun, 22 Aug 2010 20:54:54 -0700, John Larkin > > > > > > > > wrote: > > > On Sun, 22 Aug 2010 18:36:38 -0700 (PDT), dagmargoodb...@yahoo.com > > > wrote...Re: Bidirectional logic level shifting from positive to negative supply

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: What does glue-less or nearly glue-less means in processor interfacing

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: Little PICs with hi-res A-D ?

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: cool chart

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: Optocoupler question: Why is my rise time so high?

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: 7 segment driver

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: How hard is it to drive a 3-ph brushless motor?

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...Re: PIC as temperature sensor, some code

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...logic generator

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...Re: Looking for Microcontroller Recommendations

An other Microchip screwup on teh 18F14K22

Jan Panteltje - 2010-05-07 12:10:00
After waisting some huors to get SPI working with the PIC 18F14K22 connected to an ENC28J60 Ethernet cotroller, and finally grabbing the scope, I found it sort of always loses bit 0 in the SPI. So looking for that sort of disaster with googke pointed to the 'errata', well I should have looked for...An other Microchip screwup on teh 18F14K22

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...USB multifunction instruments

Re: UART Multiplexing

Paul Keinanen - 2010-04-10 01:01:00
On Fri, 09 Apr 2010 20:21:08 -0500, "eeboy" wrote: > I need an IC to share a UART between two devices. The TX/RX voltage will > range between 3.3V and 5V. The data rate is 115,200 bps. I've found a few > IC's capable of handling this but they are all so expensive (ex: MAX399 @ > $2.70 in q...Re: UART Multiplexing

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: power supply for embedded PC

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: Oscilloscopes

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: Hi-Tech Software bought by Microchip - no more other compilers

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...Re: touchscreen interfacing

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...Hope HP01D barometric sensors

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: 3.3V-5V level shifters

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: another board

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: Phone camera candidates? (MCU-if)
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