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AT45DB161E-CCUF-T Datasheet(PDF) 11 Page - List of Unclassifed Manufacturers |
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AT45DB161E-CCUF-T Datasheet(HTML) 11 Page - List of Unclassifed Manufacturers |
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11 / 73 page  11 AT45DB161E 8782G–DFLASH–10/2013 When a low-to-high transition occurs on the CS pin, the device will program the data stored in the appropriate buffer into the specified page in the main memory. The page in main memory that is being programmed must have been previously erased using one of the erase commands (Page Erase, Block Erase, Sector Erase, or Chip Erase). The programming of the page is internally self-timed and should take place in a maximum time of tP. During this time, the RDY/BUSY bit in the Status Register will indicate that the device is busy. The device also incorporates an intelligent programming algorithm that can detect when a byte location fails to program properly. If a programming error arises, it will be indicated by the EPE bit in the Status Register. 6.4 Main Memory Page Program through Buffer with Built-In Erase The Main Memory Page Program through Buffer with Built-In Erase command combines the Buffer Write and Buffer to Main Memory Page Program with Built-In Erase operations into a single operation to help simplify application firmware development. With the Main Memory Page Program through Buffer with Built-In Erase command, data is first clocked into either Buffer 1 or Buffer 2, the addressed page in memory is then automatically erased, and then the contents of the appropriate buffer are programmed into the just-erased main memory page. To perform a Main Memory Page Program through Buffer using the standard DataFlash page size (528 bytes), an opcode of 82h for Buffer 1 or 85h for Buffer 2 must first be clocked into the device followed by three address bytes comprised of two dummy bits, 12 page address bits (PA11 - PA0) that specify the page in the main memory to be written, and 10 buffer address bits (BFA9 - BFA0) that select the first byte in the buffer to be written. To perform a Main Memory Page Program through Buffer using the binary page size (512 bytes), an opcode of 82h for Buffer 1 or 85h for Buffer 2 must first be clocked into the device followed by three address bytes comprised of three dummy bits, 12 page address bits (A20 - A9) that specify the page in the main memory to be written, and nine buffer address bits (BFA8 - BFA0) that select the first byte in the buffer to be written. After all address bytes have been clocked in, the device will take data from the input pin (SI) and store it in the specified data buffer. If the end of the buffer is reached, the device will wrap around back to the beginning of the buffer. When there is a low-to-high transition on the CS pin, the device will first erase the selected page in main memory (the erased state is a Logic 1) and then program the data stored in the buffer into that main memory page. Both the erasing and the programming of the page are internally self-timed and should take place in a maximum time of tEP. During this time, the RDY/BUSY bit in the Status Register will indicate that the device is busy. The device also incorporates an intelligent erase and programming algorithm that can detect when a byte location fails to erase or program properly. If an erase or program error arises, it will be indicated by the EPE bit in the Status Register. 6.5 Main Memory Byte/Page Program through Buffer 1 without Built-In Erase The Main Memory Byte/Page Program through Buffer 1 without Built-In Erase command combines both the Buffer Write and Buffer to Main Memory Program without Built-In Erase operations to allow any number of bytes (1 to 512/528 bytes) to be programmed directly into previously erased locations in the main memory array. With the Main Memory Byte/Page Program through Buffer 1 without Built-In Erase command, data is first clocked into Buffer 1, and then only the bytes clocked into the buffer are programmed into the pre-erased byte locations in main memory. Multiple bytes up to the page size can be entered with one command sequence. To perform a Main Memory Byte/Page Program through Buffer 1 using the standard DataFlash page size (528 bytes), an opcode of 02h must first be clocked into the device followed by three address bytes comprised of two dummy bits, 12 page address bits (PA11 - PA0) that specify the page in the main memory to be written, and 10 buffer address bits (BFA9 - BFA0) that select the first byte in the buffer to be written. After all address bytes are clocked in, the device will take data from the input pin (SI) and store it in Buffer 1. Any number of bytes (1 to 528) can be entered. If the end of the buffer is reached, then the device will wrap around back to the beginning of the buffer. To perform a Main Memory Byte/Page Program through Buffer 1 using the binary page size (512 bytes), an opcode of 02h for Buffer 1 using must first be clocked into the device followed by three address bytes comprised of three dummy bits, 12 page address bits (A20 - A9) that specify the page in the main memory to be written, and nine buffer address bits (BFA8 - BFA0) that selects the first byte in the buffer to be written. After all address bytes are clocked in, the device will take data from the input pin (SI) and store it in Buffer 1. Any number of bytes (1 to 512) can be entered. If the end of the |
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