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M58WT032KB Datasheet(PDF) 30 Page - Numonyx B.V |
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M58WT032KB Datasheet(HTML) 30 Page - Numonyx B.V |
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30 / 117 page  Command interface - factory program commands M58WTxxxKT, M58WTxxxKB 30/117 6.2 Quadruple Word Program command The Quadruple Word Program command improves the programming throughput by writing a page of four adjacent words in parallel. The four words must only differ for the addresses A0 and A1. VPP must be set to VPPH during Quadruple Word Program, otherwise the command is ignored and the Status Register does not output any error. If the block is protected, then the Quadruple Word Program operation aborts, the data in the block does not change, and the Status Register outputs the error. Five bus write cycles are necessary to issue the Quadruple Word Program command: ● The first bus cycle sets up the Double Word Program command. ● The second bus cycle latches the address and the data of the first word to be written. ● The third bus cycle latches the address and the data of the second word to be written. ● The fourth bus cycle latches the address and the data of the third word to be written. ● The fifth bus cycle latches the address and the data of the fourth word to be written and starts the Program/Erase Controller. Read operations to the bank being programmed output the Status Register content after the programming has started. Programming aborts if Reset goes to VIL. As data integrity cannot be guaranteed when the program operation is aborted, the memory locations must be reprogrammed. During Quadruple Word Program operations the bank being programmed only accepts the Read Array, Read Status Register, Read Electronic Signature and Read CFI Query commands; all other commands are ignored. Dual operations are not supported during quadruple word program operations and the command cannot be suspended. Typical program times are given in Table 17: Program/erase times and endurance cycles. See Appendix C, Figure 22: Quadruple word program flowchart and pseudo code for the flowchart for using the Quadruple Word Program command. |
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