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M28W320FCT Datasheet(PDF) 17 Page - Numonyx B.V |
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M28W320FCT Datasheet(HTML) 17 Page - Numonyx B.V |
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17 / 69 page  M28W320FCT, M28W320FCB Command interface 17/69 4.3 Read Electronic Signature command The Read Electronic Signature command reads the Manufacturer and Device Codes and the Block Locking Status, or the Protection Register. The Read Electronic Signature command consists of one write cycle, a subsequent read will output the Manufacturer Code, the Device Code, the Block Lock and Lock-Down Status, or the Protection and Lock Register. See Table 5, Table 6 and Table 7 for the valid address. 4.4 Read CFI Query command The Read Query Command is used to read data from the Common Flash Interface (CFI) Memory Area, allowing programming equipment or applications to automatically match their interface to the characteristics of the device. One Bus Write cycle is required to issue the Read Query Command. Once the command is issued subsequent Bus Read operations read from the Common Flash Interface Memory Area. See Appendix B: Common Flash Interface (CFI), Table 26, Table 27, Table 28, Table 29, Table 30 and Table 31 for details on the information contained in the Common Flash Interface memory area. Table 3. Command Codes Hex Code Command 01h Block Lock confirm 10h Program 20h Erase 2Fh Block Lock-Down confirm 30h Double Word Program 40h Program 50h Clear Status Register 55h Reserved 56h Quadruple Word Program 60h Block Lock, Block Unlock, Block Lock-Down 70h Read Status Register 90h Read Electronic Signature 98h Read CFI Query B0h Program/Erase Suspend C0h Protection Register Program D0h Program/Erase Resume, Block Unlock confirm FFh Read Memory Array |
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