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M27C1001-35FTR Datasheet(PDF) 10 Page - STMicroelectronics |
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M27C1001-35FTR Datasheet(HTML) 10 Page - STMicroelectronics |
10 / 24 page Device description M27C1001 10/24 Figure 5. Programming Flowchart 2.7 Program Inhibit Programming of multiple M27C1001s in parallel with different data is also easily accomplished. Except for E, all like inputs including G of the parallel M27C1001 may be common. A TTL low level pulse applied to a M27C1001's P input, with E low and VPP at 12.75V, will program that M27C1001. A high level E input inhibits the other M27C1001s 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 E and G at VIL, P at VIH, VPP at 12.75V and VCC at 6.25V. 2.9 Electronic Signature The Electronic Signature (ES) mode enables the reading out of a binary code from an EPROM that will identify its manufacturer and type. This mode is intended for use by programming equipment to automatically match the device to be programmed with its corresponding programming algorithm. The ES mode is functional in the 25°C ± 5°C ambient temperature range that is required when programming the M27C1001. To activate the ES mode, the programming equipment must force 11.5V to 12.5V on address line A9 of the M27C1001, with VPP = VCC = 5V. Two identifier bytes may then be sequenced from the device outputs by toggling address line A0 from VIL to VIH. All other address lines must be held at VIL during Electronic Signature mode. AI00715C n = 0 Last Addr VERIFY P = 100 µs Pulse ++n = 25 ++ Addr VCC = 6.25V, VPP = 12.75V FAIL CHECK ALL BYTES 1st: VCC = 6V 2nd: VCC = 4.2V YES NO YES NO YES NO |
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Similar Description - M27C1001-35FTR |
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