Subject:
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Re: mindstorms NXT and memory
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 9 Jan 2006 07:06:37 GMT
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Viewed:
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8936 times
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In lugnet.robotics, steve <sjbaker1@airmail.net> wrote:
>
> The ARM has been around in different incarnations for maybe 15 to 20
> years. The ARM7 used in the NXT is a couple of generations behind the
> cutting edge (eg the Nintendo DS uses an ARM9 as it's main CPU). The
> big thing that makes the ARM popular for embedded systems like this one
> is that the ARM circuitry is fairly compact (because it's a RISC
> machine and therefore runs very SIMPLE instructions very fast). This
> allows system developers such as LEGO to put lots of other circuitry
> onto the same chip and thereby save a ton of money. Given the small
> amount of RAM, it's likely that the RAM is on the same chip as the
> ARM. It's even possible that the 8 bit microprocessor is also on
> that same chip.
It's also possible (likely?) that LEGO are using an already available ARM7 chip,
such as http://mcu.st.com/mcu/inchtml.php?fdir=pages&fnam=str710 or
http://www.atmel.com/dyn/products/product_card.asp?part_id=3524
ROSCO
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Message has 1 Reply:
 | | Re: mindstorms NXT and memory
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| (...) off the shelf makes a lot of sense. Think of the development costs of using ARM IP on a custom chip. Suddenly LEGO would become a hardware development group, and the costs would be really high. Even if they used PLAs, they would still have a (...) (18 years ago, 9-Jan-06, to lugnet.robotics)
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Message is in Reply To:
| | Re: mindstorms NXT and memory
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| (...) It depends on the application obviously...but thinking of consumer devices that cost around the same ballpark as the NXT and which are likely to be sold in similar quantities, we have PDA's, handheld games, MP3 players and digital cameras. * (...) (18 years ago, 9-Jan-06, to lugnet.robotics)
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