2006-09-05 10:06:37

by Maximus

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Subject: SDIO functions?

Hi,
Just going through the sdio specs and ossman's patch.


What are these functions and thier numbers in CMD 53

Does that mean an SDIO Card can support upto 8 different functions?.

An sdio card can be used as a wlan and camera (if it supports 2
functions wlan and camera).

Is it like that?. Because i have not come across a card which
supports more than one function.

What does "function" mean - does that mean some kind of firmware
inside the card or some kind electronics.

I dont understand.


Thanks and Regards,
Jo


2006-09-05 21:07:52

by Ian Stirling

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Subject: Re: SDIO functions?

Maximus wrote:
> Hi,
> Just going through the sdio specs and ossman's patch.

> What are these functions and thier numbers in CMD 53
> Does that mean an SDIO Card can support upto 8 different functions?.
>
> An sdio card can be used as a wlan and camera (if it supports 2
> functions wlan and camera).

Exactly.
It supports one or zero memory functions, and up to 7 (8?) IO functions.

AIUI, there are at the moment cards with memory and wifi.

I have wondered about expander cards - a card with a microcontroller to
do enumeration and several sockets.
This is quite complex though.