At 10:41 AM 3/8/02 -0600, C.W. wrote: >As in they can't find any evidence it exists
so there is no documentation
>on it? Or they know it exists but haven't been able to nail it down
and
>product documentation? Or???
They know it exists.
They know what causes it.
They have several workarounds.
They have documented it.
The documentation is not public.
>At 01:23 PM 03/08/02 +0000, andrew_elder wrote:
>
>>Ok, I heard back from TI. They don't have proper public
documentation
>>on this C6711 EDMA problem. If you are interested in discussing with
>>TI please email me and I will pass it on to TI.
>>
>>Thanks,
>>Andrew
>>
>>--- In c6x@y..., Andrew Elder <andrew_elder@b...> wrote:
>> >
>> > I haven't yet seen any public documentation on the issue.
I've just
>>sent TI an
>> > email to try to get a reference number (or something) for the
issue.
>> >
>> > Andrew
>> >
>> > At 05:23 PM 2/27/02 -0500, Steve Thornhill wrote:
>> > >Does TI have any technical documentation on this silicon
bug?
>> > >I'm working on a project that could be adversely affected
by this.
>> > >
>> > >Steve
>> > >
>> > >-----Original Message-----
>> > >From: Andrew Elder [mailto:andrew_elder@b...]
>> > >Sent: Wednesday, February 27, 2002 10:06 AM
>> > >To: c6x@y...
>> > >Subject: RE: [c6x] McBSPs on 100MHz
>> > >
>> > >
>> > >
>> > >All,
>> > >
>> > >The C6711 has a silicon design bug that can cause EDMA
transfers
>>to be missed.
>> > >The problem occurs when the cache controller takes over the
EDMA
>>controller
>> > (it
>> > >always has priority) thereby preventing EDMA <-> McBSP
transfers.
>>If code
>> > >generates an L1P miss followed by several L2 cache misses
the
>>cache controller
>> > >can take over the EDMA subsystem. An example of the sort of
>>operation that can
>> > >cause this is memcpy().
>> > >
>> > >Our company spent about 6 months tracking this one down.
I'd hate
>>someone else
>> > >to have to repeat the experience.
>> > >
>> > >Andrew E.
>> > >
>> > >
>> > >
>> > >At 01:29 PM 2/27/02 +0000, Martin.J Thompson wrote:
>> > >>>Martin,
>> > >>>
>> > >>>Did you encountered problems on that?
>> > >>>
>> > >>
>> > >>Not so far.
>> > >>
>> > >>>On the C6711 you can use the EDMA, isn't it? On
the C6203 it is
>>still the
>> > >>>DMA...
>> > >>>
>> > >>>Do you have any idea about the CPU-load you had?
>> > >>>
>> > >>
>> > >>Not too heavily loaded, probably around 50%.
>> > >>
>> > >>>I'm asking this 'cause I'm not sure if
the C6203 can handle 2
>>full-speed
>> > >>>McBSP@100MHz connected to DMA...
>> > >>>
>> > >>
>> > >>That would depend on things like frame-size, whether
it's going
>>to external
>> > >>memory and so forth I imagine.
>> > >>
>> > >>Cheers,
>> > >>Martin
>> > >>
>> > >>>
>> > >>>-----Original Message-----
>> > >>>From: Martin.J Thompson
[mailto:Martin.J.Thompson@t...]
>> > >>>Sent: woensdag 27 februari 2002 9:29
>> > >>>To: jan.asselman@s...; c6x@y...
>> > >>>Subject: Re: [c6x] McBSPs on 100MHz
>> > >>>
>> > >>>
>> > >>>I've done 75Mhz on a C6711 @150MHz core clock.
>> > >>>
>> > >>>Cheers,
>> > >>>Martin
>> > >>>
>> > >>>--
>> > >>>Martin Thompson BEng(Hons) CEng MIEE
>> > >>>TRW Conekt
>> > >>>Stratford Road, Solihull, B90 4GW. UK
>> > >>>Tel: +44 (0)121-627-3569 - martin.j.thompson@t...
>> > >>>
>> > >>>
>> > >>>>>> Asselman Jan <jan.asselman@s...> 26
February 2002 16:50:01
>> > >>>>>>
>> > >>>Hi,
>> > >>>
>> > >>>I'm wondering, has anyone experience using the
McBSP on speeds
>>as high as
>> > >>>75,100 or 150MHz. I'm using the C6203@300MHz. I
try to figure
>>out what the
>> > >>>maximum speed is on the McBSP if it uses the internal
clock
>>source.
>> > >>>
>> > >>>In the TI peripheral guide, it is stated that
"The maximum bit
>>rate for the
>> > >>>C6203B/03C device is 100 Mbps or CPU/2 (the slower of
the
>>two). "
>> > >>>
>> > >>>But I'm not sure I can use more than 75MHz...
>> > >>>
>> > >>>Any ideas?
>> > >>>
>> > >>>Jan
>> > >>>
>> > >>>
>> > >
>> > >
>> > >_____________________________________
>> > >Note: If you do a simple "reply" with your email
client, only the
>>author of
>> > >this message will receive your answer. You need to do a
"reply
>>all" if you
>> > >want your answer to be distributed to the entire group.
>> > >
>> > >_____________________________________
>> > >About this discussion group:
>> > >
>> > >To Join: Send an email to c6x-subscribe@y...
>> > >
>> > >To Post: Send an email to c6x@y...
>> > >
>> > >To Leave: Send an email to c6x-unsubscribe@y...
>> > >
>> > >Archives: http://www.yahoogroups.com/group/c6x
>> > >
>> > >Other Groups: http://www.dsprelated.com
>> > >
>> > >
>> > >">http://docs.yahoo.com/info/terms/
>> > >
>> > >
>> > >
>> > >
>> > >_____________________________________
>> > >Note: If you do a simple "reply" with your email
client, only the
>>author of
>> > >this message will receive your answer. You need to do a
"reply
>>all" if you
>> > >want your answer to be distributed to the entire group.
>> > >
>> > >_____________________________________
>> > >About this discussion group:
>> > >
>> > >To Join: Send an email to c6x-subscribe@y...
>> > >
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>> > >
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>> > >
>> > >Archives: http://www.yahoogroups.com/group/c6x
>> > >
>> > >Other Groups: http://www.dsprelated.com
>> > >
>> > >
>> > >">http://docs.yahoo.com/info/terms/
>> > >
>> > >
>>
>>
>>_____________________________________
>>Note: If you do a simple "reply" with your email client, only
the author
>>of this message will receive your answer. You need to do a "reply
all" if
>>you want your answer to be distributed to the entire group.
>>
>>_____________________________________
>>About this discussion group:
>>
>>To Join: Send an email to
>>
>>To Post: Send an email to
>>
>>To Leave: Send an email to
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>>Archives: http://www.yahoogroups.com/group/c6x
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>>Other Groups: http://www.dsprelated.com
>>
>>
>>">http://docs.yahoo.com/info/terms/
>
Reply by C.W.●March 8, 20022002-03-08
As in they can't find any evidence it exists so there is no
documentation
on it? Or they know it exists but haven't been able to nail it down and
product documentation? Or???
At 01:23 PM 03/08/02 +0000, andrew_elder wrote:
>Ok, I heard back from TI. They don't have
proper public documentation
>on this C6711 EDMA problem. If you are interested in discussing with
>TI please email me and I will pass it on to TI.
>
>Thanks,
>Andrew
>
>--- In c6x@y..., Andrew Elder <andrew_elder@b...> wrote:
> >
> > I haven't yet seen any public documentation on the issue.
I've just
>sent TI an
> > email to try to get a reference number (or something) for the
issue.
> >
> > Andrew
> >
> > At 05:23 PM 2/27/02 -0500, Steve Thornhill wrote:
> > >Does TI have any technical documentation on this silicon bug?
> > >I'm working on a project that could be adversely affected by
this.
> > >
> > >Steve
> > >
> > >-----Original Message-----
> > >From: Andrew Elder [mailto:andrew_elder@b...]
> > >Sent: Wednesday, February 27, 2002 10:06 AM
> > >To: c6x@y...
> > >Subject: RE: [c6x] McBSPs on 100MHz
> > >
> > >
> > >
> > >All,
> > >
> > >The C6711 has a silicon design bug that can cause EDMA
transfers
>to be missed.
> > >The problem occurs when the cache controller takes over the
EDMA
>controller
> > (it
> > >always has priority) thereby preventing EDMA <-> McBSP
transfers.
>If code
> > >generates an L1P miss followed by several L2 cache misses the
>cache controller
> > >can take over the EDMA subsystem. An example of the sort of
>operation that can
> > >cause this is memcpy().
> > >
> > >Our company spent about 6 months tracking this one down. I'd
hate
>someone else
> > >to have to repeat the experience.
> > >
> > >Andrew E.
> > >
> > >
> > >
> > >At 01:29 PM 2/27/02 +0000, Martin.J Thompson wrote:
> > >>>Martin,
> > >>>
> > >>>Did you encountered problems on that?
> > >>>
> > >>
> > >>Not so far.
> > >>
> > >>>On the C6711 you can use the EDMA, isn't it? On the
C6203 it is
>still the
> > >>>DMA...
> > >>>
> > >>>Do you have any idea about the CPU-load you had?
> > >>>
> > >>
> > >>Not too heavily loaded, probably around 50%.
> > >>
> > >>>I'm asking this 'cause I'm not sure if the
C6203 can handle 2
>full-speed
> > >>>McBSP@100MHz connected to DMA...
> > >>>
> > >>
> > >>That would depend on things like frame-size, whether it's
going
>to external
> > >>memory and so forth I imagine.
> > >>
> > >>Cheers,
> > >>Martin
> > >>
> > >>>
> > >>>-----Original Message-----
> > >>>From: Martin.J Thompson [mailto:Martin.J.Thompson@t...]
> > >>>Sent: woensdag 27 februari 2002 9:29
> > >>>To: jan.asselman@s...; c6x@y...
> > >>>Subject: Re: [c6x] McBSPs on 100MHz
> > >>>
> > >>>
> > >>>I've done 75Mhz on a C6711 @150MHz core clock.
> > >>>
> > >>>Cheers,
> > >>>Martin
> > >>>
> > >>>--
> > >>>Martin Thompson BEng(Hons) CEng MIEE
> > >>>TRW Conekt
> > >>>Stratford Road, Solihull, B90 4GW. UK
> > >>>Tel: +44 (0)121-627-3569 - martin.j.thompson@t...
> > >>>
> > >>>
> > >>>>>> Asselman Jan <jan.asselman@s...> 26
February 2002 16:50:01
> > >>>>>>
> > >>>Hi,
> > >>>
> > >>>I'm wondering, has anyone experience using the McBSP
on speeds
>as high as
> > >>>75,100 or 150MHz. I'm using the C6203@300MHz. I try
to figure
>out what the
> > >>>maximum speed is on the McBSP if it uses the internal
clock
>source.
> > >>>
> > >>>In the TI peripheral guide, it is stated that "The
maximum bit
>rate for the
> > >>>C6203B/03C device is 100 Mbps or CPU/2 (the slower of
the
>two). "
> > >>>
> > >>>But I'm not sure I can use more than 75MHz...
> > >>>
> > >>>Any ideas?
> > >>>
> > >>>Jan
> > >>>
> > >>>
> > >
> > >
> > >_____________________________________
> > >Note: If you do a simple "reply" with your email client,
only the
>author of
> > >this message will receive your answer. You need to do a
"reply
>all" if you
> > >want your answer to be distributed to the entire group.
> > >
> > >_____________________________________
> > >About this discussion group:
> > >
> > >To Join: Send an email to c6x-subscribe@y...
> > >
> > >To Post: Send an email to c6x@y...
> > >
> > >To Leave: Send an email to c6x-unsubscribe@y...
> > >
> > >Archives: http://www.yahoogroups.com/group/c6x
> > >
> > >Other Groups: http://www.dsprelated.com
> > >
> > >
> > >">http://docs.yahoo.com/info/terms/
> > >
> > >
> > >
> > >
> > >_____________________________________
> > >Note: If you do a simple "reply" with your email client,
only the
>author of
> > >this message will receive your answer. You need to do a
"reply
>all" if you
> > >want your answer to be distributed to the entire group.
> > >
> > >_____________________________________
> > >About this discussion group:
> > >
> > >To Join: Send an email to c6x-subscribe@y...
> > >
> > >To Post: Send an email to c6x@y...
> > >
> > >To Leave: Send an email to c6x-unsubscribe@y...
> > >
> > >Archives: http://www.yahoogroups.com/group/c6x
> > >
> > >Other Groups: http://www.dsprelated.com
> > >
> > >
> > >">http://docs.yahoo.com/info/terms/
> > >
> >
>_____________________________________
>Note: If you do a simple "reply" with your email client, only the
author
>of this message will receive your answer. You need to do a "reply
all" if
>you want your answer to be distributed to the entire group.
>
>_____________________________________
>About this discussion group:
>
>To Join: Send an email to
>
>To Post: Send an email to
>
>To Leave: Send an email to
>
>Archives: http://www.yahoogroups.com/group/c6x
>
>Other Groups: http://www.dsprelated.com
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Reply by andrew_elder●March 8, 20022002-03-08
Ok, I heard back from TI. They don't have proper public documentation
on this C6711 EDMA problem. If you are interested in discussing with
TI please email me and I will pass it on to TI.
Thanks,
Andrew
--- In c6x@y..., Andrew Elder <andrew_elder@b...> wrote: >
> I haven't yet seen any public documentation on the issue. I've
just sent TI an > email to try to get a reference number (or
something) for the issue.
>
> Andrew
>
> At 05:23 PM 2/27/02 -0500, Steve Thornhill wrote:
> >Does TI have any technical documentation on this silicon bug?
> >I'm working on a project that could be adversely affected by
this.
> >
> >Steve
> >
> >-----Original Message-----
> >From: Andrew Elder [mailto:andrew_elder@b...]
> >Sent: Wednesday, February 27, 2002 10:06 AM
> >To: c6x@y...
> >Subject: RE: [c6x] McBSPs on 100MHz
> >
> >
> >
> >All,
> >
> >The C6711 has a silicon design bug that can cause EDMA transfers to be missed. > >The problem occurs when the cache controller
takes over the EDMA controller > (it
> >always has priority) thereby preventing EDMA <-> McBSP
transfers. If code > >generates an L1P miss followed by several L2
cache misses the cache controller > >can take over the EDMA subsystem. An example
of the sort of operation that can > >cause this is memcpy().
> >
> >Our company spent about 6 months tracking this one down. I'd
hate someone else > >to have to repeat the experience.
> >
> >Andrew E.
> >
> >
> >
> >At 01:29 PM 2/27/02 +0000, Martin.J Thompson wrote:
> >>>Martin,
> >>>
> >>>Did you encountered problems on that?
> >>>
> >>
> >>Not so far.
> >>
> >>>On the C6711 you can use the EDMA, isn't it? On the C6203
it is still the > >>>DMA...
> >>>
> >>>Do you have any idea about the CPU-load you had?
> >>>
> >>
> >>Not too heavily loaded, probably around 50%.
> >>
> >>>I'm asking this 'cause I'm not sure if the C6203
can handle 2 full-speed > >>>McBSP@100MHz connected to DMA...
> >>>
> >>
> >>That would depend on things like frame-size, whether it's
going to external > >>memory and so forth I imagine.
> >>
> >>Cheers,
> >>Martin
> >>
> >>>
> >>>-----Original Message-----
> >>>From: Martin.J Thompson [mailto:Martin.J.Thompson@t...]
> >>>Sent: woensdag 27 februari 2002 9:29
> >>>To: jan.asselman@s...; c6x@y...
> >>>Subject: Re: [c6x] McBSPs on 100MHz
> >>>
> >>>
> >>>I've done 75Mhz on a C6711 @150MHz core clock.
> >>>
> >>>Cheers,
> >>>Martin
> >>>
> >>>--
> >>>Martin Thompson BEng(Hons) CEng MIEE
> >>>TRW Conekt
> >>>Stratford Road, Solihull, B90 4GW. UK
> >>>Tel: +44 (0)121-627-3569 - martin.j.thompson@t...
> >>>
> >>>
> >>>>>> Asselman Jan <jan.asselman@s...> 26 February
2002 16:50:01
> >>>>>>
> >>>Hi,
> >>>
> >>>I'm wondering, has anyone experience using the McBSP on
speeds as high as > >>>75,100 or 150MHz. I'm using the
C6203@300MHz. I try to figure out what the > >>>maximum speed is on the McBSP if it
uses the internal clock source. > >>>
> >>>In the TI peripheral guide, it is stated that "The maximum
bit rate for the > >>>C6203B/03C device is 100 Mbps or CPU/2
(the slower of the two). " > >>>
> >>>But I'm not sure I can use more than 75MHz...
> >>>
> >>>Any ideas?
> >>>
> >>>Jan
> >>>
> >>>
> >
> >
> >_____________________________________
> >Note: If you do a simple "reply" with your email client, only
the author of > >this message will receive your answer. You
need to do a "reply all" if you > >want your answer to be distributed to the
entire group.
> >
> >_____________________________________
> >About this discussion group:
> >
> >To Join: Send an email to c6x-subscribe@y...
> >
> >To Post: Send an email to c6x@y...
> >
> >To Leave: Send an email to c6x-unsubscribe@y...
> >
> >Archives: http://www.yahoogroups.com/group/c6x
> >
> >Other Groups: http://www.dsprelated.com
> >
> >
> >">http://docs.yahoo.com/info/terms/ > >
> >
> >
> >
> >_____________________________________
> >Note: If you do a simple "reply" with your email client, only
the author of > >this message will receive your answer. You
need to do a "reply all" if you > >want your answer to be distributed to the
entire group.
> >
> >_____________________________________
> >About this discussion group:
> >
> >To Join: Send an email to c6x-subscribe@y...
> >
> >To Post: Send an email to c6x@y...
> >
> >To Leave: Send an email to c6x-unsubscribe@y...
> >
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> >
> >Other Groups: http://www.dsprelated.com
> >
> >
> >">http://docs.yahoo.com/info/terms/ > >
> >
Reply by Andrew Elder●February 28, 20022002-02-28
I haven't yet seen any public documentation on the issue. I've just
sent TI an
email to try to get a reference number (or something) for the issue.
Andrew
At 05:23 PM 2/27/02 -0500, Steve Thornhill wrote: >Does TI have any technical documentation on this
silicon bug?
>I'm working on a project that could be adversely affected by this.
>
>Steve
>
>-----Original Message-----
>From: Andrew Elder [mailto:]
>Sent: Wednesday, February 27, 2002 10:06 AM
>To:
>Subject: RE: [c6x] McBSPs on 100MHz
>
>All,
>
>The C6711 has a silicon design bug that can cause EDMA transfers to be
missed.
>The problem occurs when the cache controller takes over the EDMA
controller (it >always has priority) thereby preventing EDMA
<-> McBSP transfers. If code
>generates an L1P miss followed by several L2 cache misses the cache
controller
>can take over the EDMA subsystem. An example of the sort of operation that
can
>cause this is memcpy().
>
>Our company spent about 6 months tracking this one down. I'd hate
someone else
>to have to repeat the experience.
>
>Andrew E.
>
>At 01:29 PM 2/27/02 +0000, Martin.J Thompson wrote:
>>>Martin,
>>>
>>>Did you encountered problems on that?
>>>
>>
>>Not so far.
>>
>>>On the C6711 you can use the EDMA, isn't it? On the C6203 it is
still the
>>>DMA...
>>>
>>>Do you have any idea about the CPU-load you had?
>>>
>>
>>Not too heavily loaded, probably around 50%.
>>
>>>I'm asking this 'cause I'm not sure if the C6203 can
handle 2 full-speed
>>>McBSP@100MHz connected to DMA...
>>>
>>
>>That would depend on things like frame-size, whether it's going to
external
>>memory and so forth I imagine.
>>
>>Cheers,
>>Martin
>>
>>>
>>>-----Original Message-----
>>>From: Martin.J Thompson [mailto:]
>>>Sent: woensdag 27 februari 2002 9:29
>>>To: ;
>>>Subject: Re: [c6x] McBSPs on 100MHz
>>>
>>>
>>>I've done 75Mhz on a C6711 @150MHz core clock.
>>>
>>>Cheers,
>>>Martin
>>>
>>>--
>>>Martin Thompson BEng(Hons) CEng MIEE
>>>TRW Conekt
>>>Stratford Road, Solihull, B90 4GW. UK
>>>Tel: +44 (0)121-627-3569 -
>>>
>>>
>>>>>> Asselman Jan <> 26 February 2002 16:50:01
>>>>>>
>>>Hi,
>>>
>>>I'm wondering, has anyone experience using the McBSP on speeds
as high as
>>>75,100 or 150MHz. I'm using the C6203@300MHz. I try to figure
out what the
>>>maximum speed is on the McBSP if it uses the internal clock
source.
>>>
>>>In the TI peripheral guide, it is stated that "The maximum bit
rate for the
>>>C6203B/03C device is 100 Mbps or CPU/2 (the slower of the two).
"
>>>
>>>But I'm not sure I can use more than 75MHz...
>>>
>>>Any ideas?
>>>
>>>Jan
>>>
>>
>_____________________________________
>Note: If you do a simple "reply" with your email client, only the
author of
>this message will receive your answer. You need to do a "reply
all" if you
>want your answer to be distributed to the entire group.
>
>_____________________________________
>About this discussion group:
>
>To Join: Send an email to
>
>To Post: Send an email to
>
>To Leave: Send an email to
>
>Archives: http://www.yahoogroups.com/group/c6x
>
>Other Groups: http://www.dsprelated.com
>">http://docs.yahoo.com/info/terms/
>
>
>_____________________________________
>Note: If you do a simple "reply" with your email client, only the
author of
>this message will receive your answer. You need to do a "reply
all" if you
>want your answer to be distributed to the entire group.
>
>_____________________________________
>About this discussion group:
>
>To Join: Send an email to
>
>To Post: Send an email to
>
>To Leave: Send an email to
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>Archives: http://www.yahoogroups.com/group/c6x
>
>Other Groups: http://www.dsprelated.com
>">http://docs.yahoo.com/info/terms/
Reply by KRUCHIO Gabor●February 28, 20022002-02-28
Andrew,
is this silicon bug documented in any 6711 Silicon Errata?
Thanks,
Gabor
> The C6711 has a silicon design bug that can cause
EDMA
> transfers to be missed.
> The problem occurs when the cache controller takes over the
> EDMA controller (it
> always has priority) thereby preventing EDMA <-> McBSP
> transfers. If code
> generates an L1P miss followed by several L2 cache misses the
> cache controller
> can take over the EDMA subsystem. An example of the sort of
> operation that can
> cause this is memcpy().
>
> Our company spent about 6 months tracking this one down. I'd
> hate someone else
> to have to repeat the experience.
>
> Andrew E.
Reply by Steve Thornhill●February 27, 20022002-02-27
Does TI have any technical documentation on this silicon bug?
I'm working on a project that could be adversely affected by this.
Steve
-----Original Message-----
From: Andrew Elder [mailto:]
Sent: Wednesday, February 27, 2002 10:06 AM
To:
Subject: RE: [c6x] McBSPs on 100MHz
All,
The C6711 has a silicon design bug that can cause EDMA transfers to be
missed.
The problem occurs when the cache controller takes over the EDMA controller
(it
always has priority) thereby preventing EDMA <-> McBSP transfers. If
code
generates an L1P miss followed by several L2 cache misses the cache
controller
can take over the EDMA subsystem. An example of the sort of operation that
can
cause this is memcpy().
Our company spent about 6 months tracking this one down. I'd hate someone
else
to have to repeat the experience.
Andrew E.
At 01:29 PM 2/27/02 +0000, Martin.J Thompson wrote: >>Martin,
>>
>>Did you encountered problems on that?
>>
>
>Not so far.
>
>>On the C6711 you can use the EDMA, isn't it? On the C6203 it is
still the
>>DMA...
>>
>>Do you have any idea about the CPU-load you had?
>>
>
>Not too heavily loaded, probably around 50%.
>
>>I'm asking this 'cause I'm not sure if the C6203 can
handle 2 full-speed
>>McBSP@100MHz connected to DMA...
>>
>
>That would depend on things like frame-size, whether it's going to
external
>memory and so forth I imagine.
>
>Cheers,
>Martin
>
>>
>>-----Original Message-----
>>From: Martin.J Thompson [mailto:]
>>Sent: woensdag 27 februari 2002 9:29
>>To: ;
>>Subject: Re: [c6x] McBSPs on 100MHz
>>
>>
>>I've done 75Mhz on a C6711 @150MHz core clock.
>>
>>Cheers,
>>Martin
>>
>>--
>>Martin Thompson BEng(Hons) CEng MIEE
>>TRW Conekt
>>Stratford Road, Solihull, B90 4GW. UK
>>Tel: +44 (0)121-627-3569 -
>>
>>
>>>>> Asselman Jan <> 26 February 2002 16:50:01
>>>>>
>>Hi,
>>
>>I'm wondering, has anyone experience using the McBSP on speeds as
high as
>>75,100 or 150MHz. I'm using the C6203@300MHz. I try to figure out
what the
>>maximum speed is on the McBSP if it uses the internal clock source.
>>
>>In the TI peripheral guide, it is stated that "The maximum bit rate
for the
>>C6203B/03C device is 100 Mbps or CPU/2 (the slower of the two).
"
>>
>>But I'm not sure I can use more than 75MHz...
>>
>>Any ideas?
>>
>>Jan
>>
>>
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The C6711 has a silicon design bug that can cause EDMA transfers to be
missed.
The problem occurs when the cache controller takes over the EDMA controller
(it
always has priority) thereby preventing EDMA <-> McBSP transfers. If
code
generates an L1P miss followed by several L2 cache misses the cache
controller
can take over the EDMA subsystem. An example of the sort of operation that
can
cause this is memcpy().
Our company spent about 6 months tracking this one down. I'd hate someone
else
to have to repeat the experience.
Andrew E.
At 01:29 PM 2/27/02 +0000, Martin.J Thompson wrote: >>Martin,
>>
>>Did you encountered problems on that?
>>
>
>Not so far.
>
>>On the C6711 you can use the EDMA, isn't it? On the C6203 it is
still the
>>DMA...
>>
>>Do you have any idea about the CPU-load you had?
>>
>
>Not too heavily loaded, probably around 50%.
>
>>I'm asking this 'cause I'm not sure if the C6203 can
handle 2 full-speed
>>McBSP@100MHz connected to DMA...
>>
>
>That would depend on things like frame-size, whether it's going to
external
>memory and so forth I imagine.
>
>Cheers,
>Martin
>
>>
>>-----Original Message-----
>>From: Martin.J Thompson [mailto:]
>>Sent: woensdag 27 februari 2002 9:29
>>To: ;
>>Subject: Re: [c6x] McBSPs on 100MHz
>>
>>
>>I've done 75Mhz on a C6711 @150MHz core clock.
>>
>>Cheers,
>>Martin
>>
>>--
>>Martin Thompson BEng(Hons) CEng MIEE
>>TRW Conekt
>>Stratford Road, Solihull, B90 4GW. UK
>>Tel: +44 (0)121-627-3569 -
>>
>>
>>>>> Asselman Jan <> 26 February 2002 16:50:01
>>>>>
>>Hi,
>>
>>I'm wondering, has anyone experience using the McBSP on speeds as
high as
>>75,100 or 150MHz. I'm using the C6203@300MHz. I try to figure out
what the
>>maximum speed is on the McBSP if it uses the internal clock source.
>>
>>In the TI peripheral guide, it is stated that "The maximum bit rate
for the
>>C6203B/03C device is 100 Mbps or CPU/2 (the slower of the two).
"
>>
>>But I'm not sure I can use more than 75MHz...
>>
>>Any ideas?
>>
>>Jan
>>
>>
Reply by Martin.J Thompson●February 27, 20022002-02-27
>Martin, >
>Did you encountered problems on that?
>
Not so far.
>On the C6711 you can use the EDMA, isn't it?
On the C6203 it is still the
>DMA...
>
>Do you have any idea about the CPU-load you had?
>
Not too heavily loaded, probably around 50%.
>I'm asking this 'cause I'm not sure
if the C6203 can handle 2 full-speed
>McBSP@100MHz connected to DMA...
>
That would depend on things like frame-size, whether it's going to
external
memory and so forth I imagine.
Cheers,
Martin
>
>-----Original Message-----
>From: Martin.J Thompson [mailto:]
>Sent: woensdag 27 februari 2002 9:29
>To: ;
>Subject: Re: [c6x] McBSPs on 100MHz
>I've done 75Mhz on a C6711 @150MHz core clock.
>
>Cheers,
>Martin
>
>--
>Martin Thompson BEng(Hons) CEng MIEE
>TRW Conekt
>Stratford Road, Solihull, B90 4GW. UK
>Tel: +44 (0)121-627-3569 -
>>>> Asselman Jan <> 26 February 2002 16:50:01
>>>>
>Hi,
>
>I'm wondering, has anyone experience using the McBSP on speeds as high
as
>75,100 or 150MHz. I'm using the C6203@300MHz. I try to figure out what
the
>maximum speed is on the McBSP if it uses the internal clock source.
>
>In the TI peripheral guide, it is stated that "The maximum bit rate for
the
>C6203B/03C device is 100 Mbps or CPU/2 (the slower of the two). "
>
>But I'm not sure I can use more than 75MHz...
>
>Any ideas?
>
>Jan
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Reply by Asselman Jan●February 27, 20022002-02-27
Hi Jeff,
We use 2 McBSPs to connect to a FPGA. The FPGA-people don't like a lot
of
wires coming in, you know... ;-)
Also, the HPI (part of the X bus) is reserved for interfacing to a
PowerPC...
Are the McBSPs taking lots of DMA&CPU time?
Cheers,
Jan
-----Original Message-----
From: Jeff Brower [mailto:]
Sent: woensdag 27 februari 2002 0:47
To: Asselman Jan
Cc:
Subject: Re: [c6x] McBSPs on 100MHz
Jan-
>I'm wondering, has anyone experience using the
McBSP on speeds as high as
>75,100 or 150MHz. I'm using the C6203@300MHz. I try to figure out what
the
>maximum speed is on the McBSP if it uses the internal clock source.
>
>In the TI peripheral guide, it is stated that "The maximum bit rate for
the
>C6203B/03C device is 100 Mbps or CPU/2 (the slower of the two). "
>
>But I'm not sure I can use more than 75MHz...
We are working with multiple C6203 device boards, running at 300 MHz, but we
have not tried the McBSPs at rates higher than around 24 Mbps. What about
X-Bus? Do you have Rev. 3.0 silicon yet? Have you tried at the rated 75
MHz?
Jeff Brower
DSP sw/hw engineer
Signalogic
Reply by Martin.J Thompson●February 27, 20022002-02-27
I've done 75Mhz on a C6711 @150MHz core clock.
Cheers,
Martin
--
Martin Thompson BEng(Hons) CEng MIEE
TRW Conekt
Stratford Road, Solihull, B90 4GW. UK
Tel: +44 (0)121-627-3569 -
>>> Asselman Jan <> 26 February 2002
16:50:01 >>> Hi,
I'm wondering, has anyone experience using the McBSP on speeds as high
as
75,100 or 150MHz. I'm using the C6203@300MHz. I try to figure out what
the
maximum speed is on the McBSP if it uses the internal clock source.
In the TI peripheral guide, it is stated that "The maximum bit rate for
the
C6203B/03C device is 100 Mbps or CPU/2 (the slower of the two). "
But I'm not sure I can use more than 75MHz...
Any ideas?
Jan
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