Communications system employing control line minimization

Details Communications system employing control line minimization Communications system employing control line minimization

1982-12-21

1989-05-16

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

34082552, 370 85, H04Q 100

Patent

active

048313580

ABSTRACT:
A communications system employs a multiline bus including control lines for multiple functions in order to minimize the required number of bus lines. This technique is most applicable to small computer systems which are hand portable or briefcase portable and which operate with small peripherals. The transmitting device places an active signal on a handshake line for a predetermined period of time. The receiving device detects this active signal and also places an active signal on the handshake line. The transmitting device applies valid data to the data lines throughout the period that a active signal is on the handshake line. Upon detection of the data the receiver releases the handshake line. Using this technique a single line is used to indicate valid data transmission and proper reception. An additional bus available line, used by a master device to alert slave devices that communications are in process, can be employed by at least some of the slave devices to request service from the master device.

REFERENCES:
patent: 3541257 (1970-11-01), McCormick et al.
patent: 4373183 (1983-02-01), Means et al.
patent: 4390969 (1983-06-01), Hayes
patent: 4446459 (1984-05-01), Bond, Jr. et al.
patent: 4462084 (1984-07-01), Greenwood
patent: 4472712 (1984-09-01), Ault et al.
patent: 4486750 (1984-12-01), Aoki

Affiliated with

Also associated with

Rating

Communications system employing control line minimization does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Communications system employing control line minimization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Communications system employing control line minimization will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2325976