Apparatus and method for transferring data along a serial data b

Details Apparatus and method for transferring data along a serial data b Apparatus and method for transferring data along a serial data b

1989-09-15

1992-07-07

Yusko, Donald J.

Coded data generation or conversion

Code generator or transmitter

Producing different pulse frequencies

34082562, 34082563, 34082565, 34087019, 375 22, G08C 1912

Patent

active

051286777

ABSTRACT:
An apparatus and method are disclosed for transferring data between devices located on a serial data bus of a data communication system. A first counter and flag are provided which are associated with a device on the serial data bus. The first counter and flag are coupled to the serial data bus for determining temporal periods of high signal levels on the data bus. A second counter and flag also associated with the device on the serial data bus is coupled to the data bus for determining temporal periods of low signal levels on the data bus. A logic demodulator is provided which is coupled to the first and second counter and flag for demodulating the high and low signal levels to binary data and for using this binary data to perform a pertinent function of the device. A transmitter is coupled to an output of the first and second counter and flag and to the demodulation logic for modulating binary data received from the device while performing its pertinent function. The resulting modulated data is thus input onto the serial data bus.

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patent: 5027109 (1991-06-01), Donovan et al.

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