Single-chip microcomputer with asynchronously accessible user de

Details Single-chip microcomputer with asynchronously accessible user de Single-chip microcomputer with asynchronously accessible user de

1994-10-14

1998-03-03

Bowler, Alyssa H.

39580043, 39518306, 395821, G06F 1300

Patent

active

057246033

ABSTRACT:
A single-chip microcomputer is constituted by a single-chip microcomputer core, an external bus interface circuit, an external bus, a logic circuit and a bus interface. For asynchronously accessing to an exterior from the single-chip microcomputer core, the external bus interface circuit produces an asynchronous access control signal to the exterior based on an access control signal from the single-chip microcomputer core. The internal bus interconnects the single-chip microcomputer core and the external bus interface circuit, and the logic circuit is asynchronously accessible to and from the single-chip microcomputer core. The bus interface circuit is connected to the internal bus and produces an asynchronous access control signal to the logic circuit based on an access control signal inputted through the internal bus. Even when the user logic unit is designed with operating clocks independent from the operating clocks of the single-chip microcomputer, the function of the user logic unit is not bound by any significant limitations, and the number of steps involved in preparing the user logic test pattern is reduced.

REFERENCES:
patent: 5089951 (1992-02-01), Iijima
patent: 5113093 (1992-05-01), Tashiro et al.
patent: 5155819 (1992-10-01), Watkins et al.
patent: 5220673 (1993-06-01), Dalrymple et al.
patent: 5228139 (1993-07-01), Miwa et al.
patent: 5247521 (1993-09-01), Akao et al.
patent: 5363380 (1994-11-01), Shinohara
patent: 5386573 (1995-01-01), Okamoto
patent: 5416919 (1995-05-01), Ogino et al.
patent: 5426769 (1995-06-01), Pawloski
patent: 5428770 (1995-06-01), Garner
patent: 5438681 (1995-08-01), Mensch, Jr.

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