Slave-type interface circuit operating with a series bus

Details Slave-type interface circuit operating with a series bus Slave-type interface circuit operating with a series bus

1985-06-04

1987-09-22

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

34082507, 364200, H04Q 100

Patent

active

046958398

ABSTRACT:
A slave-type interface circuit operating with a series bus in a configuration in which writing takes place after recognition of an address. A cycle transmitted by the bus contains an address sequence and a data sequence.
The circuit controls a plurality of user circuits (COM) on the basis of data stored in a memory (M) and of a decoder (CDEC).
A register (REG) and a bus logic (BUSL) receive at their inputs (L.sub.1, L.sub.2) information (SDA) and clock (SCL) signals. The bus logic (BUSL) receives from an identification circuit (AIC) a signal (DVA) indicating whether or not the address transmitted by the bus corresponds to an address A.sub.0, A.sub.1, A.sub.2 displayed at the inputs S.sub.0, S.sub.1 and S.sub.2. It controls the circuit on the basis of the register (REG) initialization signal (RST1), a signal LDS) for the authorization of the loading of data into the memory (M) and an acceptance signal (ACK) transmitted in the direction of the bus.

REFERENCES:
patent: 3634826 (1972-01-01), Biedermann et al.
patent: 3963869 (1976-06-01), Caldwell
patent: 4347603 (1982-08-01), Jacob et al.
patent: 4394757 (1983-07-01), Muzumdar et al.

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