SERIAL_ASCII_GENERATOR

Published:2009/7/5 22:39:00 Author:May | From:SeekIC

Provides choice of two different words in standard serial ASCII asynchronous data format for troubleshooting and testing code converters and other computer peripherals. S19 gives choice of four data output patterns. R gives logic high for all 8 bits.A gives pattern determined by settings of S1-S8. B gives pattern determined by settings of S9-S16. A/B alternates words A and B. S20 gives choice of three different output modes. Mode B generates words 1 bit at a time. Mode W produces single word at rate of 110 bauds. Mode C produces continuous output of selected word pattern, for testing teleprinters and other output devices. Article covers construction and operation of circuit. IC power (+5 V) and ground pins are: 74150-24 and 12; 74157, 74161, and 74265-16 and 8; 555-8 and 1; 7474 and 7400-14 and 7.-R. J. Finger, Build a Serial ASCII Word Generator, BYTE, May 1976, p 50-53.



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