Basically embedded coder generates generic ANSI/ISO C/C++ code which can be integrated with your hand written (low level) code and ported to any (8/16/32 bit - depending upon the device type you have selected) micro-controller on any board.
Still, simulink directly support some frequently used prototyping boards which are listed here. Advantage of using these board is that, simulink generates the complete code which can be run directly on these boards without any further integration requirement.
