Bus system with a reduced number of lines

Details Bus system with a reduced number of lines Bus system with a reduced number of lines

1997-01-23

1998-09-22

Harvey, Jack B.

395309, G06F 1300

Patent

active

058128026

ABSTRACT:
In order to reduce the number of lines of a standard bus while, at the same time, preserving the compatibility of the communications protocol, the system uses a modified bus. The modification consists in eliminating two power supply lines and in creating a line assigned to a functional signal that is complementary to one of the functional signals of the system. The supply potentials are regenerated from the functional signal and the complementary signal. The disclosed system can be applied notably to systems using I2C buses such as systems using chip-card readers.

REFERENCES:
patent: 4901217 (1990-02-01), Wilson et al.
Elektor Electronics, vol. 18 No. 197, Feb. 1992, Canterbury, Great Britain, pp. 36-40, J. Ruffell "12C Interaface for PCs"*p. 36, left col., p. 37, left col.**Figures 1,4*.
Patent Abstracts of Japan, vol. 6, No. 38 (P-105)(916) Mar. 9, 1982 & JP-A-56 157 516 (Tokoyo Shibaura Denki K.K.) Dec. 4, 1981.

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