m28w320fc Numonyx, m28w320fc Datasheet - Page 19

• Manufacturer Part Number: m28w320fc
• Description: 32 Mbit 2mb X16, Boot Block 3v Supply Flash Memory
• Manufacturer: Numonyx

M28W320FCT, M28W320FCB
4.7
4.8
4.9
Double Word Program command
This feature is offered to improve the programming throughput, writing a page of two
adjacent words in parallel.The two words must differ only for the address A0. Programming
should not be attempted when V
Three bus write cycles are necessary to issue the Double Word Program command.
1.
2.
3.
Read operations output the Status Register content after the programming has started.
Programming aborts if Reset goes to V
program operation is aborted, the block containing the memory location must be erased and
reprogrammed.
See
flowchart for using the Double Word Program command.
Quadruple Word Program command
This feature is offered to improve the programming throughput, writing a page of four
adjacent words in parallel.The four words must differ only for the addresses A0 and A1.
Programming should not be attempted when V
Five bus write cycles are necessary to issue the Quadruple Word Program command.
1.
2.
3.
4.
5.
Read operations output the Status Register content after the programming has started.
Programming aborts if Reset goes to V
program operation is aborted, the block containing the memory location must be erased and
reprogrammed.
See
flowchart for using the Quadruple Word Program command.
Clear Status Register command
The Clear Status Register command can be used to reset bits 1, 3, 4 and 5 in the Status
Register to ‘0’. One bus write cycle is required to issue the Clear Status Register command.
The bits in the Status Register do not automatically return to ‘0’ when a new Program or
Erase command is issued. The error bits in the Status Register should be cleared before
attempting a new Program or Erase command.
Appendix
Appendix
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
and starts the Program/Erase Controller.
The first bus cycle sets up the Quadruple 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.
C,
C,
Figure 18: Quadruple Word Program Flowchart and Pseudo
Figure 17: Double Word Program Flowchart and Pseudo
PP
is not at V
IL
IL
. As data integrity cannot be guaranteed when the
. As data integrity cannot be guaranteed when the
PPH
PP
.
is not at V
PPH
.
Command interface
Code, for the
Code, for the
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