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AT45DB011D-SH-SL954 Datasheet(PDF) 9 Page - List of Unclassifed Manufacturers |
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AT45DB011D-SH-SL954 Datasheet(HTML) 9 Page - List of Unclassifed Manufacturers |
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9 / 51 page  9 3639J–DFLASH–11/2012 AT45DB011D 7.6 Sector Erase The Sector Erase command can be used to individually erase any sector in the main memory. There are four sectors and only one sector can be erased at one time. To perform sector 0a or sector 0b erase for the DataFlash standard page size (264-bytes), an opcode of 7CH must be loaded into the device, followed by three address bytes comprised of five don’t care bits, seven- page address bits (PA9 - PA3) and 12 don’t care bits. To perform a sector 1-3 erase, the opcode 7CH must be loaded into the device, followed by three address bytes comprised of six don’t care bits, two page address bits (PA8 - PA7) and 16 don’t care bits. To perform sector 0a or sector 0b erase for the binary page size (256-bytes), an opcode of 7CH must be loaded into the device, followed by three address bytes comprised of six don’t care bits and seven page address bits (A17 - A11) and 11 don’t care bits. To perform a sector 1-3 erase, the opcode 7CH must be loaded into the device, followed by three address bytes comprised of seven don’t care bit and two page address bits (A16 - A15) and 16 don’t care bits. The page address bits are used to specify any valid address location within the sector which is to be erased. When a low-to-high transition occurs on the CS pin, the part will erase the selected sector. The erase operation is internally self-timed and should take place in a maximum time of t SE. During this time, the status register will indicate that the part is busy. Table 7-1. Block Erase Addressing PA8/ A16 PA7/ A15 PA6/ A14 PA5/ A13 PA4/ A12 PA3/ A11 PA2/ A10 PA1/ A9 PA0/ A8 Block 000000 X X X 0 000001 X X X 1 000010 X X X 2 000011 X X X 3 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 111100 X X X 60 111101 X X X 61 111110 X X X 62 111111 X X X 63 Table 7-2. Sector Erase Addressing PA8/ A16 PA7/ A15 PA6/ A14 PA5/ A13 PA4/ A12 PA3/ A11 PA2/ A10 PA1/ A9 PA0/ A8 Sector 000000 X X X 0a 000001 X X X 0b 010000000 1 1 0 XXXXXXX 2 1 1 XXXXXXX 3 |
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