5
(iv) Small size (for mobile application)
(v) Low power consumption ( in case of migration to a DC power supply in order
to make it truly mobile )
(vi) Ethernet interface for wire-line testing of software’s suitability for Embedded
application
(vii) Compact Storage Media ( e.g. Disk on Chip )
(viii) Enough Memory to run application.
(ix) Appropriate interfaces for user input and output ( keyboard, monitor, RS-232
serial interface )
We looked at several candidates in order to fulfill these considerations. Two of them
were head and shoulders above the rest of the competition. They were the SBC EM-350
from Akumeka Technology and the PCM 5896 from EMAC inc. The following table
shows how well they met our requirements
SBC EM-350 PCM 5896
Features
Support for Linux OS Yes Yes
PCMCIA support incl. Drivers Yes Yes
Sound support incl. Drivers yes (w/ kernel) Yes
optimum Keyboard-LCD Yes yes, RAD
Keyboard-LCD Drivers Yes Yes
Power Consumption 5V and 12V 5V and 12V
duplex sound SounBlaster comp. SoundBlaster comp.
storage media support IDE, DiskOnChip IDE, DiskonChip
availability Yes Yes
software support not known Yes
Although both of them were very close in terms of feature availability, the PCM-5896
finally won out over our previous choice, the SBC EM-350 because they seemed to be
able to offer a more complete system which promised to make our job of system
integration a whole lot easier. They were more complete in that they offered to provide an
already installed linux kernel complete with drivers to support PCMCIA, full duplex
Sound, Ethernet, and Disk on Chip. They were also able to provide us with an integrated
LCD-keypad interface in order to provide easy input/output to the system. This also
simplified our job of searching for a suitable user interface as we knew that we were
working with something that compatible with our system. They were also very available
and prompt in answering all our questions regarding the system both by phone and email.
We guessed that they would continue to be reliable during the course of the execution of
our design, integration and testing and we turned out to be correct.
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