[Arm-netbook] Fwd: Re: Ya Nanonote
luke.leighton at gmail.com
Thu Feb 28 00:48:07 GMT 2013
On Thu, Feb 28, 2013 at 12:35 AM, Alexander Stephen Thomas Ross
<maillist_arm-netbook at aross.me> wrote:
> Werner (One of the top people.) thoughts:
yeah. the EOMA modules are not intended to be used as the sole
driver of all peripherals, unless all those peripherals are USB-based
and/or I2C-based. reasons:
a) limited pin-count of the mass-volume connectors that are being re-used
b) audio and other such interfaces are impossible to pin down. do you
use AC97? I2C? I2S? SPDIF? Analog? if so, how many channels? what
bit-rates? what frequencies?
c) primarily with b in mind, a future card with an unknown capability
could simply not have audio (or any other interface not on the list).
therefore, peripherals have to be taken care of by peripheral chips,
or by an Embedded Controller [e.g. the STM32F].
so he's kinda missing the point. EOMA is a long-term strategy, not an
optimise-the-design-around-a-single-processor strategy. an EOMA I/O
board and its associated casework and mechanical design could
literally be made for 10 to 15 years and *never* have to be upgraded
*ever*. the only upgrading that's ever required: the CPU card.
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