Messages in this thread | | | Subject | Re: Sandisk Compact Flash | From | somshekar.c.kadam@in ... | Date | Wed, 3 Aug 2005 11:07:37 +0530 |
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HI David ,
Thanks a Lot for clearing all the doubts , yes its the drawback of my hardware which i cant use high speed compact flash as DMA is not supported ,
Is there anyway with the help of software to message that , this compact flash cant be used anymore , first of all is this a good idea to have such a functinality on embedded system of saying compact flash is going to die please replace it , or just by the number of years of compact flash we say replace the compact flash
Thanks In Advance Somshekar
(Embedded David Hinds <dhinds@sonic.net> image moved 07/20/2005 09:56 PM to file: pic18875.pcx)
To: somshekar.c.kadam@in.abb.com cc: linux-kernel@vger.kernel.org Subject: Re: Sandisk Compact Flash
Security Level:? Internal
On Wed, Jul 20, 2005 at 12:49:00PM +0530, somshekar.c.kadam@in.abb.com wrote: > > Hi David , > > On my controller CF INPACK pin is connected to 3.3v. so Comapct > flash with DMA capabilty will not be supported , i understood this . > but i did not undesrtand why only PIO mode 1 is supported is it , > why not PIO mode 4 , is it a limitation of pcmcia driver , correct > me if i am wrong
The 16-bit PCMCIA bus is maxed out at about 1 MB/sec; that's all the bandwidth there is. What your card supports is irrelevant.
I'm not sure whether the PCMCIA mode actually corresponds to any of the official PIO modes 0, 1, etc. It is just "slow".
-- Dave
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