Communication system

Details Communication system Communication system

1992-04-16

1994-11-22

MacDonald, Allen R.

395275, G06F 1300

Patent

active

053676440

ABSTRACT:
A communication system in which a control microcomputer (1) for an electronic device and a peripheral device thereof are connected with each other with less signal lines by using serial communication interface function (SIO) integrated in a microcomputer, wherein since an accessing request signal (REQ signal:first signal) from the control microcomputer (1) to a communication IC (3) is also used as a response signal to an access request signal from the communication IC (3) to the control microcomputer (1), and on the contrary, all accessing request signal (INT signal:third signal) from the communication IC (3) to the control microcomputer (1) is also used as a response signal to an accessing request signal from the control microcomputer (1) to the communication IC (3), the number of control signals can be reduced.

REFERENCES:
patent: 4344132 (1982-08-01), Dixon et al.
patent: 4446459 (1984-01-01), Bond, Jr. et al.
patent: 5146564 (1992-09-01), Evans et al.

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