Electrical computers and digital data processing systems: input/ – Intrasystem connection – Protocol
Reexamination Certificate
2007-08-15
2009-08-11
Rinehart, Mark (Department: 2111)
Electrical computers and digital data processing systems: input/
Intrasystem connection
Protocol
C710S029000, C710S105000, C710S071000, C710S305000, C710S310000, C711S110000, C711S170000, C370S463000, C370S514000, C370S538000, C709S209000
Reexamination Certificate
active
07574544
ABSTRACT:
A single-wire communication bus couples a transmitting device to a UART in a receiving device. Flow control circuitry in the UART fills a transmit memory buffer with remote data. The UART supplies a remote start bit onto the single-wire bus for each byte of remote data written into the transmit memory buffer. After detecting a remote start bit on the single-wire bus, the transmitting device supplies initial data bits and a stop bit, which together form an RS232 character. Data flow is controlled when the UART supplies a subsequent remote start bit only after data has been read out of the UART freeing up bytes in a receive memory buffer. After the transmitting device detects the subsequent remote start bit, the transmitting device supplies subsequent data bits onto the single-wire bus. In another embodiment, flow control circuitry functionality is performed by flow control code in the receiving device operating system.
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Imperium Patent Works
Misiura Brian T
Rinehart Mark
Wallace Darien K.
Wallace T. Lester
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