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Mobile computer system customization
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Introduction:
Usually, the standardization of standard PCs is good thing. However when you enter
the realms of embedded
computing, things get a little different.
For instance; which systembuilder has never encountered the
serial port dilemma where you face a standard DB9 serial port, but you only need a simple RxD/TxD signal pair
and some power source? Not to mention the trouble that many folks have with soldering these connectors.
Wouldn't it be nice to have a rugged connector with decent crimpcontacts and just the signals you need?
Possibilities:
We can use a wide variety of connection system to suit your requirements. The only limitation is
the rear-panel area. Within that area we can mount whatever connector you want (with some limitations).
For automotive cabling we recommend the MicroFit 3.0 connectors from Molex, which are
available in 2-24pin configurations. Or the slightly smaller MicroClasp connectors, offering
8-20 contacts. We also like the reasonably rugged Mini D Ribbon (MDR) series
from 3M for more sophisticated connections and Molex Micro-D for space-constrained standard connections.
These Micro-D connectors take 60% less space than their standard Sub-D counterparts.
When there is the need for a large number of signals (probably with some multiplexers on the board),
then we can also revert to high-density connections like Molex LFH or 3M's Shrunk D Ribbon (SDR).
Available resources:
· 4 x USB 2.0 (480Mb),
· 1 x RS232C at LVTTL level +,
· 2 x RS232C* at LVTTL level,
· 1 x RS232C* without RI at LVTTL level,
· I2C bus with 4V signalling,
· 10/100Mbps Ethernet,
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· Audio line out & mic in,
· TV-out,
· CAN at logic level (RX/TX),
· 6 x GPIO line,
· System wakeup control,
· FM antenna signal,
· Power: Vin, 12V, 5V, 3V3, 5VSB, Vram.
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*) Serial ports from PLX/Oxford OXuPCI952 or OXuPCI954 UART device. Standard hardware
comes with the dual UART, which allows for two serial ports on the I/O module.
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Costs:
A simple customized board with rear-panel can be designed for as little as 2500 euro.
So it's worthwhile to consider this, even at relative low quantities.
Example:
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Double (stacked) I/O board to increase available board-edge to almost 19cm and to
create space for the many opto-couplers.
Connections:
· 5 x universal logic input,
· 4 x universal logic output,
· iButton + LED,
· RS232 + indicators,
· RS422,
· Keyboard scanner,
· I2C cardreader.
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Beyond basics:
It does not have to stop with the above specifications. When needed we can additional functionality by means of a
mini PCI express. Planned cards are a quad UART (for a total of 8 serial ports for customer application)
and a quad-input 100/120 fps video capture card. Of course, customization costs tend to get quite a bit higher
with a custom PCI card configuration.
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