Microcomputer

Details Microcomputer Microcomputer

1997-06-18

1999-02-16

Canney, Vincent P.

Excavating

G06F 1100

Patent

active

058727922

ABSTRACT:
An object of the present invention is to provide a microcomputer capable of checking the data stored in a read only memory (ROM) integrally formed therein even without using any additional testing device, but an external ROM. In the test mode, a test signal TS to be fed to an external terminal 15 is set to a logic "1". By this operation, the output signal of a register 13 is fed to the address terminal A of the internal ROM 16 by way of a selector 14. Further, the data read out from the ROM 16 is outputted to a register 18 through a selector 17. On the other hand, by connecting the external ROM 30, in which a test program is stored, to an address terminal 21 and a data terminal 22. The CPU 11 can carry out the test program stored in the external ROM 30. By reading and comparing the data stored in the ROM 16 and the data stored in the external ROM 30 to be compared by the test program, the data in the ROM 16 can be checked.

REFERENCES:
patent: 5617429 (1997-04-01), Goto
patent: 5632024 (1997-05-01), Yajima et al.

Affiliated with

Also associated with

Rating

Microcomputer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microcomputer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microcomputer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2068458