Embedded processors ( CPUs ) can be divided into two categories : ordinary microprocessors ( Î 1\/4 P ) and microcontrollers ( Î 1\/4 C ) . Microcontrollers ( Î 1\/4 C ) have many more peripherals on chip , reducing the cost and size . Secondly , Embedded processors can be broken into two broad categories : ordinary microprocessors ( Î 1\/4 P ) and microcontrollers ( Î 1\/4 C ) , which have many more peripherals on chip , reducing cost and size .