Data transmission system

Details Data transmission system Data transmission system

1990-01-26

1992-05-12

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

34082506, H04L 516

Patent

active

051134101

ABSTRACT:
In a data transmission system having a central control unit including a data processing unit (MPU) and a communication control unit (CIM) which is capable of transmitting data to a local control unit (LCU) in a half duplex mode, the data processing unit receives the data in an interruption based on an end of data reception signal supplied from the communication control unit. At the time of initialization of the system, the central control unit responds to the application of power to the system by transmitting predetermined control data to the local control unit to set the state of accessory devices connected thereto, thereby preventing improper operation of the accessory devices during system startup.

REFERENCES:
patent: 4127845 (1978-11-01), Dansbach et al.
patent: 4399502 (1983-08-01), MacDonald et al.
patent: 4419666 (1983-12-01), Gurr et al.
patent: 4459582 (1984-07-01), Sheahan et al.
patent: 4466001 (1984-08-01), Moore et al.
patent: 4477809 (1984-10-01), Bose
patent: 4530045 (1985-07-01), Petroff
patent: 4593349 (1986-06-01), Chase et al.

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