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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AM29F010B-70PC датащи(PDF) 12 Page - Advanced Micro Devices |
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AM29F010B-70PC датащи(HTML) 12 Page - Advanced Micro Devices |
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12 / 31 page  12 Am29F010 written. If the time between additional sector erase commands can be assumed to be less than 50 µs, the system need not monitor DQ3. Any command during the time-out period resets the device to reading array data. The system must rewrite the command se- quence and any additional sector addresses and com- mands. The system can monitor DQ3 to determine if the sector erase timer has timed out. (See the “DQ3: Sector Erase Timer” section.) The time-out begins from the ris- ing edge of the final WE# pulse in the command se- quence. Once the sector erase operation has begun, all other commands are ignored. When the Embedded Erase algorithm is complete, the device returns to reading array data and addresses are no longer latched. The system can determine the sta- tus of the erase operation by using DQ7 or DQ6. Refer to “Write Operation Status” for information on these status bits. Figure 2 illustrates the algorithm for the erase opera- tion. Refer to the Erase/Program Operations tables in the “AC Characteristics” section for parameters, and to the Sector Erase Operations Timing diagram for timing waveforms. Notes: 1. See the appropriate Command Definitions table for erase command sequence. 2. See “DQ3: Sector Erase Timer” for more information. Figure 2. Erase Operation START Write Erase Command Sequence Data Poll from System Data = FFh? No Yes Erasure Completed Embedded Erase algorithm in progress 16736G-8 |
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