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Power consumption: Cardbus vs USB vs PCMCIA Card Reader

Forum Laptops & Notebooks : General Laptops & Notebooks - Power consumption: Cardbus vs USB vs PCMCIA Card Reader

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Anonymous   11-20-2004 at 05:51:34 PM

Archived from groups: comp.sys.laptops (More info?)

 

I am looking for any feedback on what the different power consumption of a
Cardbus (32bit), PCMCIA (PC Card, 16bit) or USB 2.0 Compact Flash Card
Reader would be. I will be using it in a Dell Insiron 700m, mainly on
battery power, so power consumption is important.

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Anonymous   11-20-2004 at 05:51:35 PM
- 0 +

Archived from groups: comp.sys.laptops (More info?)

 

There's not much inherint difference simply because of the type of card.
But there are substantial model-to-model differences, so you really
just need to compare the specific cards that you are considering. The
newer cards are likely to be cardbus, and also to have lower power
consumption, but because they are newer, not because they are cardbus.


PlaneGuy wrote:

> I am looking for any feedback on what the different power consumption of a
> Cardbus (32bit), PCMCIA (PC Card, 16bit) or USB 2.0 Compact Flash Card
> Reader would be. I will be using it in a Dell Insiron 700m, mainly on
> battery power, so power consumption is important.
>
>

Reply to Anonymous
Anonymous   11-20-2004 at 05:51:35 PM
- 0 +

Archived from groups: comp.sys.laptops (More info?)

 

>I am looking for any feedback on what the different power consumption of a
>Cardbus (32bit), PCMCIA (PC Card, 16bit) or USB 2.0 Compact Flash Card
>Reader would be. I will be using it in a Dell Insiron 700m, mainly on
>battery power, so power consumption is important.
>
Anything is better than USB. Since it puts a load on the CPU which
must then control all its data flow. More load means more heat and
less run time. Not to mention that USB + netorking = Trouble.

Reply to Anonymous
Anonymous   11-20-2004 at 05:51:35 PM
- 0 +

Archived from groups: comp.sys.laptops (More info?)

 

PlaneGuy wrote:
> I am looking for any feedback on what the different power consumption of a
> Cardbus (32bit), PCMCIA (PC Card, 16bit) or USB 2.0 Compact Flash Card
> Reader would be. I will be using it in a Dell Insiron 700m, mainly on
> battery power, so power consumption is important.

I doubt if Cardbus ones exist ... isn't CF a 5V-supplied format ? If so,
a cardbus adapter wouldn't have a way of powering it ...

The PCMCIA adapters work very well ... nice and simple ATA i/f, so no
messy layers of device drivers.


--
...

I am not a marketing target ... I am a free man.

Reply to Anonymous
Anonymous   11-20-2004 at 05:51:36 PM
- 0 +

Archived from groups: comp.sys.laptops (More info?)

 

Martin Slaney <slaz@dsl.NIET_SPAMpipex.com> wrote in
news:deSdnQjuTPCyVgPcRVnyhw@pipex.net:

> PlaneGuy wrote:
>> I am looking for any feedback on what the different power consumption
>> of a Cardbus (32bit), PCMCIA (PC Card, 16bit) or USB 2.0 Compact
>> Flash Card Reader would be. I will be using it in a Dell Insiron
>> 700m, mainly on battery power, so power consumption is important.
>
> I doubt if Cardbus ones exist ... isn't CF a 5V-supplied format ? If
> so, a cardbus adapter wouldn't have a way of powering it ...

From CardBus white paper (at www.pcmcia.org):
"A CardBus interface can support card operation at either 5v or 3.3v. The
adapter includes a standard method for determining the card's power needs
following card attachment. Both CardBus cards and "low-voltage" PC Card-16
cards operate at 3.3v. In addition, the CardBus standard has made
allowances for the support of two progressively lower voltages, "X.Xv" and
"Y.Yv", in the future. This will facilitate the construction of even lower-
voltage CardBus cards as required by lower-voltage future platforms."

So it capable of supporting 5v power.

Alexei

Reply to Anonymous
Anonymous   11-21-2004 at 03:49:36 PM
- 0 +

Archived from groups: comp.sys.laptops (More info?)

 

The pcmcia site is absolutely clear (thanks alexei), but just to reinforce,
here is a link to a Cardbis CF adaptor
http://www.delkin.com/store/custom [...] cat=&page=

Reply to Anonymous
Anonymous   11-21-2004 at 03:49:48 PM
- 0 +

Archived from groups: comp.sys.laptops (More info?)

 

Andrew,

the reason I am asking is that someone had mentioned the PCMCIA card
readers, require one hundred percent CPU resources - something I didn't
quite believe. I am aware that USB requires system resources, but do you, or
anybody else, know how much system resource a PCMCIA will have?

"AndrewJ" <andrewjbbrREMOVE@gmail.com> wrote in message
news:u9btp0h3qee3g5kck9ifh3sc3ao2tpttjq@4ax.com...
>
>
> >I am looking for any feedback on what the different power consumption of
a
> >Cardbus (32bit), PCMCIA (PC Card, 16bit) or USB 2.0 Compact Flash Card
> >Reader would be. I will be using it in a Dell Insiron 700m, mainly on
> >battery power, so power consumption is important.
> >
> Anything is better than USB. Since it puts a load on the CPU which
> must then control all its data flow. More load means more heat and
> less run time. Not to mention that USB + netorking = Trouble.

Reply to Anonymous
Anonymous   11-21-2004 at 06:10:03 AM
- 0 +

Archived from groups: comp.sys.laptops (More info?)

 

Alexei Boukirev wrote:

> Martin Slaney <slaz@dsl.NIET_SPAMpipex.com> wrote in
> news:deSdnQjuTPCyVgPcRVnyhw@pipex.net:
>
>
>>PlaneGuy wrote:
>>
>>>I am looking for any feedback on what the different power consumption
>>>of a Cardbus (32bit), PCMCIA (PC Card, 16bit) or USB 2.0 Compact
>>>Flash Card Reader would be. I will be using it in a Dell Insiron
>>>700m, mainly on battery power, so power consumption is important.
>>
>>I doubt if Cardbus ones exist ... isn't CF a 5V-supplied format ? If
>>so, a cardbus adapter wouldn't have a way of powering it ...
>
>
> From CardBus white paper (at www.pcmcia.org):
> "A CardBus interface can support card operation at either 5v or 3.3v. The
> adapter includes a standard method for determining the card's power needs
> following card attachment. Both CardBus cards and "low-voltage" PC Card-16
> cards operate at 3.3v. In addition, the CardBus standard has made
> allowances for the support of two progressively lower voltages, "X.Xv" and
> "Y.Yv", in the future. This will facilitate the construction of even lower-
> voltage CardBus cards as required by lower-voltage future platforms."
>
> So it capable of supporting 5v power.

Oh - I stand corrected ....

--
...

I am not a marketing target ... I am a free man.

Reply to Anonymous
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