Re: Sandisk Compact Flash

David Hinds
2005-07-20T16:26:28Z

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