Circuit and method for using the I.sup.2 C serial protocol with

Details Circuit and method for using the I.sup.2 C serial protocol with Circuit and method for using the I.sup.2 C serial protocol with

1997-09-18

2000-06-20

Tokar, Michael

Electronic digital logic circuitry

Interface

Current driving

326 81, 326 86, 326 90, 326 68, H03K 190175, H03K 19094, H03K 19082

Patent

active

060781920

ABSTRACT:
An apparatus and method wherein networked communications devices having different operating voltages share information according to the I.sup.2 C protocol, using unidirectional level shifters. A first bidirectional line having a first operating voltage shares information according to the I.sup.2 C protocol with a second bidirectional line having a second operating voltage different from the first operating voltage, where at least one of the bidirectional lines is split into two lines and connected to the other bidirectional line via unidirectional level shifters.

REFERENCES:
patent: 4853560 (1989-08-01), Iwamura et al.
patent: 5084637 (1992-01-01), Gregor
patent: 5311083 (1994-05-01), Wanlass
patent: 5521530 (1996-05-01), Yao et al.
patent: 5903737 (1999-05-01), Han
RF/Wireless Communications Data Handbook, Philips Semiconductors, pp. 131-149.

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