While looking at an old schematic (circa 1993), I came across a serial DAC
(TDA1543) whose data sheet listed it as an "I2S" interface. This is a
Philips part. Does anyone know if I2S is the same as I2C? Or what it a
forerunner?
> While looking at an old schematic (circa 1993), I came across a serial
> DAC (TDA1543) whose data sheet listed it as an "I2S" interface. This
> is a Philips part. Does anyone know if I2S is the same as I2C? Or what
> it a forerunner?
I've seen it before but only on some Philips parts. (audio)
When I just Googled for "philips i2s" the first hit is a pdf
explaining it all in detail. (Well, from a quick glance anyway)
David...
No, it's not I2C (as far as I know). I've seen it a bunch of times
when discussing digital audio streams. I know the parts from Crystal
(now Cirrus) can use that protocol as well. This is from memory, but I
think there is a bit clock signal, a data signal, and a left/right
signal (which tells you which channel you're talking about). I might
be wrong on this though, it would be a good idea to check it out.
Josh
--
A common mistake that people make when trying to design something
completely foolproof is to underestimate the ingenuity of complete
fools.
-Douglas Adams
On Thu, 27 Jan 2005 06:22:38 -0600, Douglas Wood <spam_OUTdbwoodTakeThisOuTkc.rr.com> wrote:
> While looking at an old schematic (circa 1993), I came across a serial DAC
> (TDA1543) whose data sheet listed it as an "I2S" interface. This is a
> Philips part. Does anyone know if I2S is the same as I2C? Or what it a
> forerunner?
>-----Original Message-----
>From: .....piclist-bouncesKILLspam@spam@mit.edu [piclist-bouncesKILLspammit.edu]
>Sent: 27 January 2005 13:03
>To: Microcontroller discussion list - Public.
>Subject: Re: [EE]: I2S - Ever heard of it?
>
>
>No, it's not I2C (as far as I know). I've seen it a bunch of
>times when discussing digital audio streams. I know the parts
>from Crystal (now Cirrus) can use that protocol as well. This
>is from memory, but I think there is a bit clock signal, a
>data signal, and a left/right signal (which tells you which
>channel you're talking about). I might be wrong on this
>though, it would be a good idea to check it out.
You are correct, it's a three wire serial bus designed for digital audio
applications. The Aconym is for "Inter-IC Sound"
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>While looking at an old schematic (circa 1993), I came across a serial DAC
>(TDA1543) whose data sheet listed it as an "I2S" interface. This is a
>Philips part. Does anyone know if I2S is the same as I2C? Or what it a
>forerunner?
>
>Douglas Wood
It's a standard way of transferring data to audio DACs - clock, data and LRCLK
> While looking at an old schematic (circa 1993), I came across a
> serial DAC
> (TDA1543) whose data sheet listed it as an "I2S" interface. This is a
>
> Philips part. Does anyone know if I2S is the same as I2C? Or what it
> a
> forerunner?
>
> Douglas Wood
>
I2S is another format all together developed by Phillips. I2S is a LOT
faster and is used with DSP's primarily, but is available on several
ARM based processors as well. It supports 16 18 20 24 all the way to 32
bit data for both A2D and D2A convertors. Left and Right Channels as
well. Speeds are from 4ksps to 216ksps stereo per bit chanel. Burr
Brown makes an I2S compatible 24bit D2A convertor with 8 channels (it's
also DSD compatible) DSD1608. It's one of the original high resolution
synchronise serial protocols. It's more akin to SPI than I2C and is a
continous transmission standard as opposed to SPI and I2C which are
asynchronise. Often D2A/A2D convertors that support this also have
there control via I2C or SPI.
> I2S is another format all together developed by Phillips. I2S is a LOT
> faster and is used with DSP's primarily, but is available on several
> ARM based processors as well. It supports 16 18 20 24 all the way to 32
> bit data for both A2D and D2A convertors. Left and Right Channels as
> well. Speeds are from 4ksps to 216ksps stereo per bit chanel.
To bring this home to PICs, the I2S format is supported by some dsPIC30F
chips. See:
kc.rr.com> wrote:
