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TMS27C12825NL4 Datasheet(PDF) 5 Page - Texas Instruments |
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TMS27C12825NL4 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 14 page TMS27C128 131 072-BIT UV ERASABLE PROGRAMMABLE READ-ONLY MEMORY TMS27PC128 131 072-BIT PROGRAMMABLE READ-ONLY MEMORY SMLS128E–OCTOBER 1984–REVISED JANUARY 1993 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 5 program verify Programmed bits may be verified with VPP = 13 V when G = VIL, E = VIL, and PGM = VIH. signature mode The signature mode provides access to a binary code identifying the manufacturer and type. This mode is activated when A9 is forced to 12 V ± 0.5 V. Two identifier bytes are accessed by A0; i.e., A0 = VIL accesses the manufacturer code, which is output on DQ0–DQ7; A0 = VIH accesses the device code, which is output on DQ0–DQ7. All other addresses must be held at VIL. The manufacturer code for these devices is 97, and the device code is 83. |
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