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AF512CFI-7ACXP Datasheet(PDF) 11 Page - List of Unclassifed Manufacturers |
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AF512CFI-7ACXP Datasheet(HTML) 11 Page - List of Unclassifed Manufacturers |
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11 / 68 page  Revision 3.6 ATP Industrial Grade CompactFlash Card Specification 2.7 Global Wear Leveling- Longer Life Expectancy The program / erase cycle of each sector/page/block is finite. Writing constantly on the same spot will cause the flash to wear out quickly. Furthermore, bit errors are not proportioned to P/E cycles; sudden death may occur when the block is close to its P/E cycle limit. Then unrecoverable bit errors will cause fatal data loss (especially for system data or FAT). Global wear leveling algorithm evenly distributes the P/E cycles of each block to minimize the possibility of one block exceeding its max P/E cycles before the rest. In return, the life expectancy of memory storage device is prolonged and the chance/occurrence of unrecoverable bit errors could be reduced. 2.8 StaticDataRefresh Technology – Assure Data Integrity Over time the error bits accumulate to the threshold in the flash memory cell and eventually become uncorrectable despite using the ECC engine. In the traditional handling method, the data is moved to a different location in the flash memory; despite the corrupted data is beyond repaired before the transition. To prevent data corruption, the CF card monitors the error bit levels in each read operation; when it reaches the preset threshold value, StaticDataRefresh is achieved by erasing and re-programming the data into the same block or into another block. After the re-programming operation is completed, the controller reads the data and compares the data/parity to ensure data integrity. 2.9 ATP PowerProtector – Built-in Power Down Data Protection ATP PowerProtector technology ensures a sufficient amount of reserve power during any power abnormalities such as unstable voltages and power outages. PowerProtector’s patent pending technology is a stand alone hardware design that does not require specific controllers or customized firmware. This feature provides greater flexibility during the design of a smaller form factor such as CompactFlash cards. During a sudden power failure, the drive then draws power from PowerProtector’s solid state capacitors for reserve power, which guarantee reliable drive operations. The solid state capacitors allow the flash to finish processing the last command or data. SuperCap, the traditional power protection design, is well known for its sensitivity to temperature change and has a tendency of losing its capacitance and functionality at extreme temperatures. The average life span of SuperCap is less than two years; the capacitance will degrade over time and eventually fail to perform. ATP PowerProtector surpasses the natural limitations of SuperCap designs by supporting wide Y Yoouurr U Ullttiim maattee M Meem moorryy S Soolluuttiioonn!! 11 ATP Confidential & Proprietary |
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