Integrating the memory and other peripherals on a single chip and testing them as a unit increases the cost of that chip, but often results in decreased net cost of the embedded system as a whole. Even if the cost of a CPU that has integrated peripherals is slightly more than the cost of a CPU and external peripherals, having fewer chips typically allows a smaller and cheaper circuit board, and reduces the labor required to assemble and test the circuit board, in addition to tending to decrease the defect rate for the finished assembly.
integrating the memory and other peripherals on a single chip and testing them as a unit increases the cost of that chip but often results in decreased net cost of the embedded system as a whole even if the cost of a cpu that has integrated peripherals is slightly more than the cost of a cpu and external peripherals having fewer chips typically allows a smaller and cheaper circuit board and reduces the labor required to assemble and test the circuit board in addition to tending to decrease the defect rate for the finished assembly