Electronic Components Datasheet Search |
|
AT45DB021D-SSH-SL954 Datasheet(PDF) 8 Page - List of Unclassifed Manufacturers |
|
AT45DB021D-SSH-SL954 Datasheet(HTML) 8 Page - List of Unclassifed Manufacturers |
8 / 48 page 8 3638M–DFLASH–5/2013 AT45DB021D 5.4 Page Erase The Page Erase command can be used to individually erase any page in the main memory array allowing the Buffer to Main Memory Page Program to be utilized at a later time. To perform a page erase in the DataFlash standard page size (264-bytes), an opcode of 81H must be loaded into the device, followed by three address bytes comprised of five don’t care bits, 10 page address bits (PA9 - PA0) that specify the page in the main memory to be erased and nine don’t care bits. To perform a page erase in the binary page size (256-bytes), the opcode 81H must be loaded into the device, followed by three address bytes consist of six don’t care bits, 10 page address bits (A17 - A8) that specify the page in the main memory to be erased and eight don’t care bits. When a low-to-high transition occurs on the CS pin, the part will erase the selected page (the erased state is a logical 1). The erase operation is internally self-timed and should take place in a maximum time of tPE. During this time, the status register will indicate that the part is busy. 5.5 Block Erase A block of eight pages can be erased at one time. This command is useful when large amounts of data has to be written into the device. This will avoid using multiple Page Erase Commands. To perform a block erase for the DataFlash standard page size (264-bytes), an opcode of 50H 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. The seven page address bits are used to specify which block of eight pages is to be erased. To perform a block erase for the binary page size (256-bytes), the opcode 50H must be loaded into the device, followed by three address bytes consisting of six don’t care bits, seven page address bits (A17 - A11) and 11 don’t care bits. The 9-page address bits are used to specify which block of eight pages is to be erased. When a low-to-high transition occurs on the CS pin, the part will erase the selected block of eight pages. The erase operation is internally self-timed and should take place in a maximum time of tBE. During this time, the status register will indicate that the part is busy. Table 5-1. Block Erase Addressing 5.6 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 1-7 erase, the opcode 7CH must be loaded into the device, followed by three address bytes comprised of five don’t care bits, three page address bits (PA9 - PA7) and 16 don’t care bits. To perform sector 0a or sector 0b erase for PA9/ A17 PA8/ A16 PA7/ A15 PA6/ A14 PA5/ A13 PA4/ A12 PA3/ A11 PA2/ A10 PA1/ A9 PA0/ A8 Block 0000000 X X X 0 0000001 X X X 1 0000010 X X X 2 0000011 X X X 3 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 1111100 X X X 124 1111101 X X X 125 1111110 X X X 126 1111111 X X X 127 |
Similar Part No. - AT45DB021D-SSH-SL954 |
|
Similar Description - AT45DB021D-SSH-SL954 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |