Gigadevice Semiconductor (beijing) Inc.

Gigadevice Semiconductor Inc.

Jinghua Wang

Nanfei Wang

Baokui Li

An information protection method and device based on a plurality of sub-areas for an MCU chip, the MCU chip comprises an instruction bus, a data bus, a flash controller and a user area of a flash memory, the method comprises: determining a preceding sub-area when the instruction bus accesses the user area; entering corresponding preceding sub-area working state; determining the current sub-area when the instruction bus accesses the user area; when the preceding sub-area is inconsistent with the current sub-area, entering the transition state; determining whether the duration of the transition state reaches the preset waiting time; if yes, entering the corresponding current sub-area working state. The information protection method and device prevent the cooperative companies which develop the program together from stealing program from each other.

Information protection method and device based on a plurality of sub-areas for MCU chip

A flash controller and a control method for the flash controller. The flash controller comprises an instruction bus interface, a data bus interface, a configuration register, an erase access filter module, a read/write access filter module and a flash control module. The read/write access filter module is configured to receive control information and determine whether the read/write access is sent to the flash control module or not. The erase access filter module is configured to receive control information and determine whether the erase access is sent to the flash control module or not. The flash control module is configured to complete an access to a flash memory. The present disclosure is used to protect programs from being stolen by a client, and also protect against a situation where companies collaboratively developing a program are able to steal programs from one another.

Flash controller and control method for flash controller

The disclosure discloses a method and a device of information protection for a micro control unit (MCU) chip, the MCU chip comprises an instruction bus, a data bus, a flash controller and a user area of a flash memory; the flash controller is used to divide the user area into a first sub-area and a second sub-area; the method comprising: when the instruction bus accesses the user area, determining, whether the instruction bus accesses the first sub-area; if yes, entering the first sub-area working state; in the first sub-area working state, if the instruction bus accesses the second sub-area, entering the transition state; determining whether the time at transition state reaches a preset waiting time; if yes, entering the second sub-area working state; the disclosure is used to protect program from being stolen by users and prevent the cooperative companies stealing program from each other.

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Beijing, China

Jinghua Wang