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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M58LW032D датащи(PDF) 13 Page - STMicroelectronics |
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M58LW032D датащи(HTML) 13 Page - STMicroelectronics |
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13 / 50 page  13/50 M58LW032D READ MODES Read operations in the M58LW032D are asyn- chronous. The device outputs the data corre- sponding to the address latched, that is the memory array, Status Register, Common Flash In- terface, Electronic Signature or Block Protection Status depending on the command issued. During read operations, if the bus is inactive for a time equivalent to tAVQV, the device automatically enters Auto Low Power mode. In this mode the in- ternal supply current is reduced to the Auto Low Power supply current, IDD5. The Data Inputs/Out- puts will still output data if a Bus Read operation is in progress. Read operations can be performed in two different ways, Random Read (where each Bus Read oper- ation accesses a different Page) and Page Read. In Page Read mode a Page of data is internally read and stored in a Page Buffer. Each memory page is a 4 Words or 8 Bytes and has the same A3-A21. In x8 mode only A0, A1 and A2 may change, in x16 mode only A1 and A2 may change. The first read operation within the Page has the normal access time (tAVQV), subsequent reads within the same Page have much shorter access times (tAVQV1). If the Page changes then the nor- mal, longer timings apply again. See Figure 10., Page Read AC Waveforms, and Table 16., Page Read AC Characteristics, for de- tails on when the outputs become valid. |
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