luc wrote:
Le dimanche 18 février 2007 à 15:10 -0700, James Richard Tyrer a écrit :
snip
5. However, the major advantage of this is that you can add additional
processors to the front side bus. You can add a MPU, ROM and multiple
GPU chips to the front side bus.
The question is cost. Would a multiple chip board cost more or less to
produce? IIUC, that depends on the volume being produced.
Maybe I'm wrong, but I've read on this mailinglist that the more you
have to populate a board, the more that cost.
Yes, that is one of the factors.
Other factors go the other way, including:
Larger packages tend to require more board layers.
Custom chips cost more than off the shelf.
Larger chips have lower yields and therefore higher cost per
unit area.
A single chip might not have as long a life cycle.
Smaller ASIC chips might not need to be full custom, structured
might work.
and some of these factors are dependent on volume. E. G. structured
chips have lower up front costs but cost more per unit.
It is an optimization problem with no simple answer.
--
JRT
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