SERIAL BUS Ring Protocol for Single-Chip Micro-Computers
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Disclosed is a means by which several micro-computers having the serial interface capability of the Intel 8051 micro-processor may communicate over a single wire serial bus in a ring configuration. It is unique in its use of the ninth data bit to delineate both the start and end of a command sequence, the manner in which permission to transmit (Token Control) is achieved, and the use of the Data Pacing Line to prevent loss of data (overrun) during a multi-byte data transmission. Background In the design of, for example, low cost electronic typewriters, it is often desirable to use single-chip micro-computers, such as the Intel 8051, to perform device control and text processing control functions.