Patent ID: 7624205
Filing Date: 2009-11-24
Classification: G06F,G09G

Abstract:
1. A microcontroller being configured as a common evaluation chip that comprehensively includes functional specifications of a plurality of product chips, said microcontroller comprising: a processing circuit operating in accordance with a program; a plurality of peripheral circuits; a peripheral circuit control register having a plurality of bits corresponding to said plurality of peripheral circuits, respectively, among the plurality of bits a bit corresponding to a peripheral circuit mounted on the microcontroller and associated with a functional specification of one of the product chips being an object of program development is set under a set state and a bit corresponding to a peripheral circuit not associated with a functional specification of one of the product chips is set under a reset state, via an access by said processing circuit; and an access control circuit activating an access signal to the peripheral circuit to which the access by said processing circuit occurs when one of the bits in said peripheral circuit control register corresponding to the peripheral circuit is under a set state and not activating the access signal to the peripheral circuit to which the access by said processing circuit occurs when one of the bits in said peripheral circuit control register corresponding to the peripheral circuit is under a reset state, when the access to any of said peripheral circuits by said processing circuit occurs.