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Asynchronous Data Communication System Disclosure Number: IPCOM000060905D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09

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Aoki, H Hama, H [+details]


This article describes the use of a break condition (i.e., low level condition of a data transmission line with a time period equal to or longer then one character data length) to indicate the end of a block of characters. Prior asynchronous data communication systems for sending a block of characters between a sender terminal and areceiver terminal required (a) the sending of a control data indicating a length of the block or (b) the sending of ablock end code following the block of characters. However, the former requires a long transmission period and acomplicated data communication procedure to send both the control data and the block of characters.