Operation mode setting apparatus on a single chip microprocessor

Details Operation mode setting apparatus on a single chip microprocessor Operation mode setting apparatus on a single chip microprocessor

1984-11-29

1986-12-09

Eng, David Y.

Boots, shoes, and leggings

G06F 900

Patent

active

046284486

ABSTRACT:
On a single chip microprocessor which has 2.sup.n operation modes, apparatus which permits selecting one mode out of the 2.sup.n operation modes by using only one external pin connection and user program execution. A mode-setting register on the single chip microprocessor can be updated both through the external pin designating one of the two start modes, which are part of the 2.sup.n operation modes, during the reset state of the microprocessor and through a write operation generated by executing a user program during the normal (nonreset) state of the microprocessor.

REFERENCES:
patent: 3975712 (1976-08-01), Hepworth et al.
patent: 4072852 (1978-02-01), Hogan et al.
patent: 4080659 (1978-03-01), Francini

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