Title:
情報処理装置および情報処理方法
Document Type and Number:
Japanese Patent JP4260984
Kind Code:
B2
Abstract:
An information processing system which makes it possible to protect information stored in the ROM of the system from unauthorized access by means of a debug tool. The information processing system includes a ROM for storing an unlocking program and a user program; a CPU for executing said unlocking program and said user program stored in said ROM; an on-chip debug circuit serving to output debug information of said user program as executed by said information processing system; and a debug function disabling circuit serving to disable debug functions of said on-chip debug circuit at power up and to enable the debug functions of said on-chip debug circuit when said unlocking program has been executed.
More Like This:
| JP2000268584 | NONVOLATILE SEMICONDUCTOR STORAGE DEVICE AND ITS MANUFACTURE |
| JP4483816 | Mobile terminal devices and programs |
| JP5034721 | Storage device |
Inventors:
Tetsuya Tabe
Eiichi Asai
Eiichi Asai
Application Number:
JP15825699A
Publication Date:
April 30, 2009
Filing Date:
June 04, 1999
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G06F21/60; G06F11/22; G06F11/36; G06F12/14; G06F15/78; G06F21/14; G06F21/62
Domestic Patent References:
| JP8255096A | ||||
| JP6138925A | ||||
| JP4247737A | ||||
| JP7271751A |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Iwa Saki Kokuni
Kawamata Sumio
Nakamura Tomoyuki
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
Iwa Saki Kokuni
Kawamata Sumio
Nakamura Tomoyuki
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
Previous Patent: 分子膜センサ、物質分析方法および分子膜の感応物質濃度決定方法
Next Patent: NON-LASER TYPE SCANNING DEVICE AND METHOD
Next Patent: NON-LASER TYPE SCANNING DEVICE AND METHOD