| 摘要 |
A memory sharing method and a device are provided to enable a main controller and a supplementary controller to share a memory through a control bus, thereby reducing communication lines as decreasing package pins since a memory pin connected to the outside of a package of a chip is not used. A supplementary controller(410) carries out a preset supplementary function. A supplementary memory unit(420) is combined/inserted to be subordinate to the supplementary controller. A main controller(400) is combined with the supplementary controller through a control bus(440), and controls driving initiation or driving termination of the supplementary controller through the control bus. If communication through the control bus is not performed, a route is connected to directly couple the main controller with the supplementary memory unit through the control bus.
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