From: Omair Mohammed Abdullah <omair.m.abdullah@linux.intel.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: alsa-devel@alsa-project.org
Subject: Re: Question: PCM short and long sync formats
Date: Mon, 26 Mar 2012 18:59:43 +0530 [thread overview]
Message-ID: <4F706F47.2090306@linux.intel.com> (raw)
In-Reply-To: <20120326120853.GP3098@opensource.wolfsonmicro.com>
On Monday 26 March 2012 05:38 PM, Mark Brown wrote:
> On Mon, Mar 26, 2012 at 05:37:15PM +0530, Omair Mohammed Abdullah wrote:
>> On Monday 26 March 2012 03:56 PM, Mark Brown wrote:
>
>>> I'm sorry but I still have no idea what you're talking about. You've
>>> described PCM mode but not explained what "short frame sync" and "long
>>> frame sync" mode are.
>
>> This diagram may explain things better:
>> http://picpaste.com/pcm_fs-7dBlrkuW.png
>
> Sorry, that's not really clarifying things. It looks like "long frame
> sync" is just I2S but presumably there's some difference?
Yes, in I2S mode, according to the spec I have, the frame sync leads the
MSB of the data by 1 bit clock cycle. Whereas the 'long frame sync' mode
starts with the MSB of the data.
next prev parent reply other threads:[~2012-03-26 13:27 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-21 10:21 Question: PCM short and long sync formats Omair Mohammed Abdullah
2012-03-21 11:51 ` Mark Brown
2012-03-26 9:06 ` Omair Mohammed Abdullah
2012-03-26 10:26 ` Mark Brown
2012-03-26 12:07 ` Omair Mohammed Abdullah
2012-03-26 12:08 ` Mark Brown
2012-03-26 13:29 ` Omair Mohammed Abdullah [this message]
2012-03-26 13:33 ` Mark Brown
2012-03-27 3:32 ` [PATCH] ASoC: Added PCM short and long frame " Omair Mohammed Abdullah
2012-03-27 3:34 ` Omair Mohammed Abdullah
2012-03-27 7:33 ` Lars-Peter Clausen
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