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M27C322-80B3 Datasheet(PDF) 9 Page - STMicroelectronics |
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M27C322-80B3 Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 24 page M27C322 Device operation 9/24 Figure 3. Programming Flowchart 2.7 Program Inhibit Programming of multiple M27C322s in parallel with different data is also easily accomplished. Except for E, all like inputs including GVPP of the parallel M27C322 may be common. A TTL low level pulse applied to a M27C322's E input and VPP at 12V, will program that M27C322. A high level E input inhibits the other M27C322s from being programmed. 2.8 Program Verify A verify (read) should be performed on the programmed bits to determine that they were correctly programmed. The verify is accomplished with GVPP at VIL. Data should be verified with tELQV after the falling edge of E. AI02206 n = 0 Last Addr VERIFY E = 50 µs Pulse ++n = 25 ++ Addr VCC = 6.25V, VPP = 12V FAIL CHECK ALL WORDS 1st: VCC = 6V 2nd: VCC = 4.2V YES NO YES NO YES NO SET MARGIN MODE RESET MARGIN MODE |
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