Messages in this thread | | | Date | Wed, 20 Jul 2005 09:26:20 -0700 | From | David Hinds <> | Subject | Re: Sandisk Compact Flash |
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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".
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