Hynix Semiconductor Inc.

Abov Semiconductor Co., Ltd.

Jong-Hong Bae

Disclosed is a method and apparatus of a code read only memory (ROM) data capable of protecting code ROM data is easily read and plagiarized in field in case of testing a code ROM built-in a microcontrol unit (MCU) The apparatus for protecting data outputted from a code ROM has: a first encryptor for encrypting data outputted from the code ROM; a second encryptor for generating a read enable signal through an encryption process; and an output unit for dumping out the encrypted data outputted from the first encryptor in response to the read enable signal outputted from the second encryptor.

Apparatus for protecting code ROM data in code ROM test

In a memory within a micro controller, a method for addressing a page for inputting and outputting the page data on a bus. The method includes steps of producing a first control signal activated at a data update mode in which a read or write operation is executed, and determining in response to the first control signal whether the read or write operation is executed for the same page or a different page.

Method for memory addressing in micro controller and device using the same

The present invention relates to a micro controller development system (MDS) capable of helping a development of hardware and related software of a micro control unit (MCU). The micro controller development system according to the present invention includes: a micro controller including first and second data I/O ports; a memory unit for storing commands for a program to be transplanted to an internal code ROM in the micro controller; a switch for transferring address signals to the memory unit in response to a first control signal and for transferring the commands from the memory unit to the micro controller in response to the first control signal, wherein the address signals are transferred via the first data I/O port and wherein the commands are transferred via the second data I/O port; a first I/O interface unit for performing data input or output between the first data I/O port and a single data port of an external device in response to a second control signal; and a second I/O interface unit for performing data input or output between the second data I/O port and the single data port external device in response to the second control signal.

Micro controller development system

A method for generating a register transfer level code, comprising the steps of: generating the generalized register transfer level code without considering process conditions; separating all logic gates into either a combinational logic circuit or a sequential logic circuit; transforming the register transfer level code of the separated combinational logic circuits and sequential logic circuits into each equivalent register transfer level code; and simplifying the combinational logic circuits and the sequential logic circuits into one simple code.

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Ichon-shi, South Korea

Jong-Hong Bae