M58WR064HT datasheet(28/111 Pages) NUMONYX

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Command interface - Factory program commands

M58WR064HT, M58WR064HB

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6.3

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 differ only for the addresses A0

and A1.

VPP must be set to VPPH during Quadruple Word Program, otherwise the command will be

ignored and the Status Register will not output any error.

If the block is protected, then the Quadruple Word Program operation will abort, the data in

the block will not be changed and the Status Register will output the error.

Five bus write cycles are necessary to issue the Quadruple Word Program command.

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The first bus cycle sets up the Double Word Program Command.

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The second bus cycle latches the Address and the Data of the first word to be written.

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The third bus cycle latches the Address and the Data of the second word to be written.

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The fourth bus cycle latches the Address and the Data of the third word to be written.

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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 will only accept

the Read Array, Read Status Register, Read Electronic Signature and Read CFI Query

command, all other commands will be ignored.

Dual operations are not supported during Quadruple Word Program operations and the

command cannot be suspended. Typical Program times are given in Table 16:

Program/Erase times and endurance cycles.

See Appendix C, Figure 21: Quadruple Word Program Flowchart and Pseudo Code, for the

flowchart for using the Quadruple Word Program command.

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