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M58WT032KB Datasheet(PDF) 22 Page - Numonyx B.V |
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M58WT032KB Datasheet(HTML) 22 Page - Numonyx B.V |
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22 / 117 page  Command interface - standard commands M58WTxxxKT, M58WTxxxKB 22/117 5.4 Read CFI Query command The Read CFI Query command reads data from the common Flash interface (CFI). The Read CFI Query command consists of one bus write cycle to an address within one of the banks. Once the command is issued subsequent bus read operations in the same bank read from the common Flash interface. If a Read CFI Query command is issued in a bank that is executing a program or erase operation, the bankgoes into Read CFI Query mode, subsequent bus read cycles output the CFI data, and the Program/Erase Controller continues to program or erase in the background. This mode supports asynchronous or single synchronous reads only; it does not support page mode or synchronous burst reads. The status of the other banks is not affected by the command (see Table 13). After issuing a Read CFI Query command, a Read Array command should be issued to the addressed bank to return the bank to read array mode. Dual operations between the parameter bank and the CFI memory space are not allowed (see Table 15: Dual operation limitations for details). See Appendix B: Common Flash interface, Tables 34, 35, 36, 37, 38, 39, 40, 41, 42 and 43 for details on the information contained in the common Flash interface memory area. 5.5 Clear Status Register command The Clear Status Register command resets (set to ‘0’) error bits SR1, SR3, SR4 and SR5 in the Status Register. One bus write cycle is required to issue the Clear Status Register command. The Clear Status Register command does not change the read mode of the bank. The error bits in the Status Register do not automatically return to ‘0’ when a new command is issued. The error bits in the Status Register should be cleared before attempting a new program or erase command. |
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