Oki Electric Industry Co., Ltd.

Taikisha Ltd.

Kaikisha Ltd.

Isao Ohashi

Koji Hayashi

Hisashi Umeda

Makoto Watanabe

Koji Tanagawa

Gen Kusunoki

Paint drying furnace

In a microprocessor including a data memory device a simple checking circuit is provided for reading out the data onto a data bus line to check whether the data must be debugged. The checking circuit reads out data stored in an accumulator, register, etc. onto the data bus line. The checking circuit allows the microprocessor to operate normally in the absence of a checking signal and respectively connects the accumulator, register, or RAM outputs to the data bus in accordance with the timing signals from the microprocessor timing signal generator in the presence of the checking signal. A program counter of the microprocessor is also inhibited from incrementing when the checking signal is present.

Microprocessor

Growing community of inventors

Tokyo, Japan

Isao Ohashi