Communications: electrical – Continuously variable indicating – With meter reading
Patent
1991-10-24
1994-01-18
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
34082522, H04J 324
Patent
active
052802817
ABSTRACT:
A communication network, such as an audiovisual system, on an automobile has a master unit and a plurality of slave units which are connected to a common communication bus. Each of the master and slave units is capable of successively issuing a plurality of command data through asynchronous transmission to another unit and returning acknowledgement data in response to the command data transmitted from another unit. The units add received command data to acknowledgement data when the acknowledgement data is to be returned. The command data includes first command data requiring acknowledgement data and second command data requiring no acknowledgement data. Each unit handles the first and second command data differently when the acknowledgement data is to be returned. When communication data is to be transmitted between the units, major classification data and subclassification data, depending on the contents of the communication data, are added to a leading portion of the communication data.
REFERENCES:
patent: 4707828 (1987-11-01), Yamada
patent: 5008879 (1991-04-01), Fischer et al.
patent: 5107256 (1992-04-01), Ueno et al.
Gou Yasunao
Ikata Yoshikatsu
Kimura Toshiyuki
Shimotsuma Hiroshi
Giust J.
Pioneer Electronic Corporation
Yusko Donald J.
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