4 × 4 matrix keyboard interface circuit achieved by single port lines | Zendy

Lin Zhiqi | Zendy; Shi Xinrong | Zendy

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4 × 4 matrix keyboard interface circuit achieved by single port lines

Author(s) -

Lin Zhiqi,

Shi Xinrong

Publication year - 2016

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

eISSN - 1350-911X

pISSN - 0013-5194

DOI - 10.1049/el.2015.3586

Subject(s) - chip , port (circuit theory) , capacitor , matrix (chemical analysis) , interface (matter) , engineering , electrical engineering , element (criminal law) , electronic engineering , computer hardware , computer science , voltage , materials science , composite material , pulmonary surfactant , gibbs isotherm , chemical engineering , political science , law

It is usual that eight pins is used to connect the single‐chip with 4 × 4 matrix keyboard by the method of scanning. A method without any other active element is raised. Only one pin, four capacitors and four resistances are used to connect the single‐chip with 4 × 4 matrix keyboard without any other chip and active element.

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