Title:
【発明の名称】入出力回路
Document Type and Number:
Japanese Patent JP3025899
Kind Code:
B2
Abstract:
PURPOSE:To increase the degree of freedom of system design by variously combining switching of the control input level, that of the output control level, and that of the output impedance. CONSTITUTION:An output control means 4 is provided. When the input data logic of a first input 11 of an input logic switching means 1 is equal to the input data logic designated by a second input 12, the output logical level designated by a fourth input 14 is forcibly outputted to a first output 16 when the impedance designated by a third input 13 is low. The first output 16 is forcibly set to the high impedance state when the impedance designated by the third input 13 is high. When the output logic of the first input 11 is different from the input logic designated by the second input, fifth input data 15 is directly outputted to the first output 16. Thus the degree of freedom of system design is increased.
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Inventors:
Yutaka Katagawa
Application Number:
JP23892090A
Publication Date:
March 27, 2000
Filing Date:
September 11, 1990
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G06F3/00; G06F15/78; (IPC1-7): G06F3/00; G06F15/78
Attorney, Agent or Firm:
Mitsutake Murayama