>On 25 Apr., 20:53, ghel...@lycos.com wrote:
>> On Apr 24, 6:12 pm, "budflora" <budfl...@gmail.com> wrote:
>>
>>
>>
>> > >On Apr 24, 4:36 am, "budflora" <budfl...@gmail.com> wrote:
>> > >> Dear all,
>> > >>   I am studying mmc spec these days. And i'm trying to design a
mmc
>> > device
>> > >> controller, and want to integrate with a nand flash controller
which
>> > has
>> > >> been finished. of course, a processor is needed. i am wondering
>> > command
>> > >> decoding and response handling and the implementation of MMC spec
is
>> > all
>> > >> implemented just by hardware or processor will share part of job.
>> > which
>> > >> solution is better? I hope friends here can help me, thanks!
>>
>> > >Without knowing anything about this NAND FLASH controller you have,
it
>> > >is impossible to answer your question.
>>
>> > >A MMC card is typically a NAND-FLASH with a SPI interface; a search
>> > >for NAND FLASH SPI would undoubtedly be helpful.
>>
>> > >Google; it's not just for mail anymore!
>>
>> > >G.
>>
>> > Thank you for your advice.
>>
>> > The nand flash controller i have is software-mode, and we have
already
>> > finished the driver for it. I want to implement 4-bit or 8-bit MMC
bus mode
>> > instead of SPI mode. The thing i want to make clear is that whether
I
>> > should decode the MMC command by hardware or by firmware. Which kind
is
>> > better, I prefer firmware. Can anybody give me more oppinion? Thanks
so
>> > much!
>>
>> You are still not providing enough information for someone else to
>> guess at an answer.
>>
>> But you seem to have already decided which is better for you.
>>
>> Best of luck,
>> G.
>
>he is.
>
>answer is quite simple, there is no reasonable device(MCU) that would
>do mmc 4 bit slave by software at maximum mmc clk speeds.
>so an FPGA and hard IP is needed between the mmc bus and the flash
>controller
>
>Antti
>
>
>
>
Thank you so much.

On 25 Apr., 20:53, ghel...@lycos.com wrote:
> On Apr 24, 6:12 pm, "budflora" <budfl...@gmail.com> wrote:
>
>
>
> > >On Apr 24, 4:36 am, "budflora" <budfl...@gmail.com> wrote:
> > >> Dear all,
> > >>   I am studying mmc spec these days. And i'm trying to design a mmc
> > device
> > >> controller, and want to integrate with a nand flash controller which
> > has
> > >> been finished. of course, a processor is needed. i am wondering
> > command
> > >> decoding and response handling and the implementation of MMC spec is
> > all
> > >> implemented just by hardware or processor will share part of job.
> > which
> > >> solution is better? I hope friends here can help me, thanks!
>
> > >Without knowing anything about this NAND FLASH controller you have, it
> > >is impossible to answer your question.
>
> > >A MMC card is typically a NAND-FLASH with a SPI interface; a search
> > >for NAND FLASH SPI would undoubtedly be helpful.
>
> > >Google; it's not just for mail anymore!
>
> > >G.
>
> > Thank you for your advice.
>
> > The nand flash controller i have is software-mode, and we have already
> > finished the driver for it. I want to implement 4-bit or 8-bit MMC bus mode
> > instead of SPI mode. The thing i want to make clear is that whether I
> > should decode the MMC command by hardware or by firmware. Which kind is
> > better, I prefer firmware. Can anybody give me more oppinion? Thanks so
> > much!
>
> You are still not providing enough information for someone else to
> guess at an answer.
>
> But you seem to have already decided which is better for you.
>
> Best of luck,
> G.

he is.

answer is quite simple, there is no reasonable device(MCU) that would
do mmc 4 bit slave by software at maximum mmc clk speeds.
so an FPGA and hard IP is needed between the mmc bus and the flash
controller

Antti

On Apr 24, 6:12 pm, "budflora" <budfl...@gmail.com> wrote:
> >On Apr 24, 4:36 am, "budflora" <budfl...@gmail.com> wrote:
> >> Dear all,
> >>   I am studying mmc spec these days. And i'm trying to design a mmc
> device
> >> controller, and want to integrate with a nand flash controller which
> has
> >> been finished. of course, a processor is needed. i am wondering
> command
> >> decoding and response handling and the implementation of MMC spec is
> all
> >> implemented just by hardware or processor will share part of job.
> which
> >> solution is better? I hope friends here can help me, thanks!
>
> >Without knowing anything about this NAND FLASH controller you have, it
> >is impossible to answer your question.
>
> >A MMC card is typically a NAND-FLASH with a SPI interface; a search
> >for NAND FLASH SPI would undoubtedly be helpful.
>
> >Google; it's not just for mail anymore!
>
> >G.
>
> Thank you for your advice.
>
> The nand flash controller i have is software-mode, and we have already
> finished the driver for it. I want to implement 4-bit or 8-bit MMC bus mode
> instead of SPI mode. The thing i want to make clear is that whether I
> should decode the MMC command by hardware or by firmware. Which kind is
> better, I prefer firmware. Can anybody give me more oppinion? Thanks so
> much!

You are still not providing enough information for someone else to
guess at an answer.

But you seem to have already decided which is better for you.

Best of luck,
G.

>On Apr 24, 4:36 am, "budflora" <budfl...@gmail.com> wrote:
>> Dear all,
>>   I am studying mmc spec these days. And i'm trying to design a mmc
device
>> controller, and want to integrate with a nand flash controller which
has
>> been finished. of course, a processor is needed. i am wondering
command
>> decoding and response handling and the implementation of MMC spec is
all
>> implemented just by hardware or processor will share part of job.
which
>> solution is better? I hope friends here can help me, thanks!
>
>Without knowing anything about this NAND FLASH controller you have, it
>is impossible to answer your question.
>
>A MMC card is typically a NAND-FLASH with a SPI interface; a search
>for NAND FLASH SPI would undoubtedly be helpful.
>
>Google; it's not just for mail anymore!
>
>G.
>

Thank you for your advice.

The nand flash controller i have is software-mode, and we have already
finished the driver for it. I want to implement 4-bit or 8-bit MMC bus mode
instead of SPI mode. The thing i want to make clear is that whether I
should decode the MMC command by hardware or by firmware. Which kind is
better, I prefer firmware. Can anybody give me more oppinion? Thanks so
much!