RE: [pci] CardBus interface

[random_user@163.com]

I have compared the CardBus spec. with the PCI spec 2.2 and I found
no difference in using the BARs in the conf.
I think they are the same in using it.
I am confused of the CSTSCHG# pin and the CCLKRUN# pin.
HOW to handle them?
I don't think the CSTSCHG# pin is of much use.And, it is optional.So,
can I design a CardBus bridge core without it?
As for the CCLKRUN# pin,I don't know how to deal with it.
What's your opinion?
Any help wiil be appreciated!

regards,
wangc



----- Original Message ----- 
From: "Charles Krinke" <ckrinke@p... > 
To: <pci@o... > 
Date: Thu, 20 Jun 2002 08:32:28 -0700 
Subject: RE: [pci] CardBus interface 

> 
> 
> I believe the term multifunction in the context of this mailing 
> list and the 
> PCI bridge refers solely to those PCI devices that have more then 
> one 
> function in a single device. This is the term as used by the PCI 
> specification itself. Many Intel chips such as the 82371 
> Northbridge that is 
> on many motherboards and the 80312 Companion chip that I use with 
> the 80200 
> processor are multifunction devices. This means they have more then 
> one 
> Vendor/DeviceID, more then one set of configuration registers and 
> more then 
> one set of functions. 
> In each PCI device, there are several Base Address Registers. It is 
> entirely 
> common for one BAR to address MEM and a second BAR to address IO 
> space in 
> the same PCI device. 
> As for PC CARDS, dont know much about that, know a bit about PCI. 
> Charles 
> 
> -----Original Message----- 
> From: owner-pci@o...  
> [/cgi-bin/post.cgi?cmd=new&to=owner-pci%20at%20opencores%
20dot%20org&msg=/ml-archive/pci/msg00044.shtml 
> Behalf 
> Of random_user@1...  
> Sent: Thursday, June 20, 2002 4:17 AM 
> To: pci@o...  
> Subject: Re: [pci] CardBus interface 
> 
> 
> Hi, 
> It looks like that there is no concept of multifunction in the 
> CardBus 
> specification 
> In my opinion,this concept 
> is used in the 16-bit PC CARD specification,in which a CARD can be 
> used 
> only as MEM Card or I/O Card.When a card is used for both MEM and 
> I/O 
> operation ,it is called multifunction Card. 
> But in the CardBus specification and later,the term--multifunction 
> appeared no more. 
> Am I right?If not,can you tell me what's the right ? 
> Thank you for any information. 
> And,I want to know when the PCI bridge core is modified to be used 
> as 
> CardBus bridge core, what,in details,should be modified ? 
> Thanks. 
> regards, 
> wangc 
> 
> 
> 
> 
> ----- Original Message ----- 
> From: "Chandrashekar" <chandrashekar@r... > 
> To: <pci@o... > 
> Date: Thu, 20 Jun 2002 10:40:15 +0530 
> Subject: Re: [pci] CardBus interface 
> 
> > 
> > 
> > Hi, 
> > 
> > I refered the PC Card CardBus specification document and it 
> says 
> > the BAR's 
> > usage in case of CardBus is similar to PCI BARs. But one BAR 
> is 
> > sufficient 
> > for one function implemented in the card. For multifunction 
> cardbus 
> > cards, 
> > you have to use as much BAR(max 6) as the no. of 
> multifunctions 
> > implemented 
> > in the card 
> > 
> > regards, 
> > Chandrashekar 
> > 
> > ----- Original Message ----- 
> > From: <random_user@1... > 
> > To: <pci@o... > 
> > Sent: Thursday, June 20, 2002 8:09 AM 
> > Subject: Re: [pci] CardBus interface 
> > 
> > 
> > > hi, 
> > > I am working on CardBus interface now. 
> > > I think the base address registers in the conf can be 
> used for 
> > CardBus in 
> > > the same way.Do you think so? 
> > > 
> > > regards, 
> > > wangc 
> > > 
> > > ----- Original Message ----- 
> > > From: "Chandrashekar" <chandrashekar@r... > 
> > > To: <pci@o... > 
> > > Date: Wed, 19 Jun 2002 09:46:53 +0530 
> > > Subject: [pci] CardBus interface 
> > > 
> > > > Hi, 
> > > > 
> > > > I need to design CardBus interface. I have PCI open 
> core 
> > downloaded 
> > > > and I have modified it to target only operation. Now 
> I 
> > want to 
> > > > convert the PCI target only design to CardBus 
> design. I 
> > am not very 
> > > > clear about using the Base address register in the 
> > configuration 
> > > > space for the cardbus interface. Does any one 
> working on 
> > CardBus 
> > > > interface? or any information on cardbus interface 
> > design? 
> > > > 
> > > > thanks 
> > > > chandrashekar 
> > > > 
> > > 
> > > 
> > 
> 
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