11.07.2015 Views

Dynamic Shift Registers - Bitsavers - Trailing-Edge

Dynamic Shift Registers - Bitsavers - Trailing-Edge

Dynamic Shift Registers - Bitsavers - Trailing-Edge

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A.a:-MNit)~~.......A.a:ROM Code Converters-M MM4231RP/MM5231RP EBCDIC to ASCII-7 code converterNq-~:t general descriptionThe MM4231RP/MM5231RP is a 2048-bit readonlymemory that has been programmed to convertfrom EBCDIC, an extended binary codeddecimal interchange code used in the IBM 1130computer, to ASCII-7, the American StandardCode for Information Interchange in seven bits.This conversion differs from the ANSI x 3.26conversion of the MM4230QX/MM5230QX in thatit follows certain earl ier IBM 1130 character assignments.Also certain EBCDIC control codes arearbitrarily preserved and translated (see translationchart on truth table).For electrical, environmental and mechanical details,refer to the MM4231/MM5231 data sheet.typical applicationEBCDIC TO ASCII-7+5VEBCDICLOW TRUE 12,15ASCIIHIGH TRUEMSBBITD17AaB,11HIGH = GraphiclOW = ControllBA,10B, ~-------------------------'---+--~~--ob,19AaB,A.0,A.MM52J1RP8,A,B,A,8,LSB A,B,16.24,136.8K 6.aK S.BK 6.0K 6.BKDM74046.8K-12V216

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