Debugging device of microcomputer

Abstract

Abstract PURPOSE:To reduce the cost of the titled debugging device, by eliminating an interface circuit of a console. CONSTITUTION:A switch SW is turned on to start a monostable multivibrator MMV2, and an input is given to a halt terminal HALT. Then an output obtained by having an AND of the basic clock given from a terminal phi and the output of a valid memory address terminal VMA is fed to an FF5. The states of address and data buses are latched by the FF5, and the latched signal controls a light emitting diode LED6. When it is desired to check the states of the data and address buses thereafter, the switch SW is turned on and off. Thus an output is generated from the MMW2 and displayed to the LED. This enables the debugging.

Inventors

• 👤 Masaru Kato
• 👤 勝 加藤

Bibliographic Details