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LE25S40FD Datasheet(PDF) 11 Page - ON Semiconductor |
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LE25S40FD Datasheet(HTML) 11 Page - ON Semiconductor |
11 / 22 page LE25S40FD www.onsemi.com 11 6. Small Sector Erase Small sector erase is an operation that sets the memory cell data in any small sector to "1". A small sector consists of 4Kbytes. "Figure 11 Small Sector Erase" shows the timing waveforms, and Figure 20 shows a small sector erase flowchart. The small sector erase command consists of the first through fourth bus cycles, and it is initiated by inputting the 24-bit addresses following (20h) or (D7h). Addresses A18 to A12 are valid, and Addresses A23 to A19 are "don't care". After the command has been input, the internal erase operation starts from the rising CS edge, and it ends automatically by the control exercised by the internal timer. Erase end can also be detected using status register RDY. Figure 11 Small Sector Erase 7. Sector Erase Sector erase is an operation that sets the memory cell data in any sector to "1". A sector consists of 64Kbytes. "Figure 12 Sector Erase" shows the timing waveforms, and Figure 20 shows a sector erase flowchart. The sector erase command consists of the first through fourth bus cycles, and it is initiated by inputting the 24-bit addresses following (D8h). Addresses A18 to A16 are valid, and Addresses A23 to A19 are "don't care". After the command has been input, the internal erase operation starts from the rising CS edge, and it ends automatically by the control exercised by the internal timer. Erase end can also be detected using status register RDY. Figure 12 Sector Erase Self-timed Erase Cycle SCK SI High Impedance SO CS tSSE Add. 20h / D7h Add. Add. 15 0 1 2 3 4 5 6 7 8 23 16 24 31 Mode3 Mode0 8CLK MSB SCK SI High Impedance SO CS tSE Self-timed Erase Cycle Add. D8h Add. Add. 15 0 1 2 3 4 5 6 7 8 23 16 24 31 Mode3 Mode0 8CLK MSB |
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