12.07.2015 Views

1 - Al Kossow's Bitsavers

1 - Al Kossow's Bitsavers

1 - Al Kossow's Bitsavers

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TMS4725632,768·WORD BY 8·BIT READ·ONLY MEMORYPROGRAMMING DATAPROGRAMMING REQUIREMENTS: The TMS47256 is a fixed program memory in which the programming is performed byTI at the factory during the manufacturing cycle to the specific customer inputs supplied in the format below. The deviceis organized as 16,384 8-bit words with address locations numbered 0 to 32,767. The 8-bit words can be coded as a 2-digithexadecimal number between 00 and FF. <strong>Al</strong>l data words and addresses in the following format are coded in hexadecimalnumbers. In coding all binary words must be in positive logic before conversion to hexadecimal. Q1 is considered the leastsignificant bit and Q8 the most significant bit. For addresses, AO is least significant bit and A 14 is the most significant.The input media containing the programming data can be in the form of EPROMs, cards, or data formatted in card images(contact TI for details).Either 16K, 32K, or 64K EPROMs can be used or any combination of them.The following is a description of how the cards/card images must be formatted, should they be used instead of EPROMs.INPUT CARD FORMATEach code deck submitted by customer shall consist of the following:IIos:cCD

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