Patent ID: 6170043
Filing Date: 2001-01-02
Classification: G06F

Abstract:
An optic-disk system control chip, used in an optic-disk system to update its firmware information, the control chip comprising: a microprocessor, coupled to a data bus, wherein the microprocessor is also coupled to an external memory through the data bus, in which the external memory is used to store the firmware information; a decoder, coupled to the microprocessor through the data bus, wherein the decoder is also coupled to an external buffer memory, and an external main board inter face, which serves as an interface to communicate with an external computer; a controller, coupled to the decoder, and coupled to the microprocessor through the data bus, wherein the controller is used to receive a control signal and general data; and an extra memory, coupled to the microprocessor through the data bus, wherein when the optic-disk system is operated at an update mode, the microprocessor yields at least an output enable signal, a chip selection signal, and a writing-in signal so as to temporarily treat the external memory to as a data access memory and treat the extra memory as an execution program memory, and after the firmware is completely updated, the extra memory is treated back as its original data access memory and the external memory is treated back as its original execution program memory.