Embedded Research & Design
Embedded systems come in many varoius type and sizes with even more possibilities for processor types and interface requirements. Typically most companies use programmable logic controllers (PLS's) for system control, but where custom embedded systems shine is in speed and customisation for a specific task. Another area where custom embedded development is commonly used if for IP protection or because it is very difficult for a custom piece of hardware to be copied, where software in an off the shelf system is generally much easier to duplicate.
All systems I have developed rely on 8 to 32 bit microcontrollers at the heart of the system. Some systems have multiple microcontrollers that communicate over a mini-network. All of the systems I have developed usually have a master section or core that communicates with a host computer either directly via RS232, or via ethernet or wireless radio link giving great flexibility in connction options.
Low Power Design
In portable and remote battery powered systems, the power requirements are usually very important. Even systems where power is readily available, power consumption of their electronic products. Other issues with power consumption, is that lower power systems often generate less electromagnetic interference that may disturb other electronic equipment operating nearby.
I have several years experience developing low power embedded microcontroller based system that often consume average currents of less than 10mA running, with some systems as low as 0.5 to 1mA operational.