Title:
MICROCOMPUTER
Document Type and Number:
Japanese Patent JP3520102
Kind Code:
B2
Abstract:
PURPOSE: To inhibit a 3rd person from reading an internal program out.
CONSTITUTION: The microcomputer 10 has an internal program memory 13 inside and can have an external program memory 20 added and is equipped with a means 12 which detects whether or not an address outputted by a program counter 11a is present in the address space of the internal program memory 13 and inhibits the internal program memory 13 from being read out when the absence of the address in the address space of the internal program memory 13 is detected.
Inventors:
Tomono, Moriyasu
Inoue, Tatsuo
Inoue, Tatsuo
Application Number:
JP33499793A
Publication Date:
April 19, 2004
Filing Date:
December 28, 1993
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
G06F9/32; G06F12/14; G06F15/78; G06F21/10; G06F21/14; G06F21/60; (IPC1-7): G06F12/14; G06F9/32; G06F15/78
Attorney, Agent or Firm:
佐藤 一雄 （外３名）
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