m29dw256g Numonyx, m29dw256g Datasheet - Page 81

• Manufacturer Part Number: m29dw256g
• Description: 256-mbit X16, Multiple Bank, Page, Dual Boot 3 V Supply Flash Memory
• Manufacturer: Numonyx

Appendix D
Figure 25. Write to buffer program flowchart and pseudocode
1. n+1 is the number of addresses to be programmed.
2. A write to buffer program abort and reset must be issued to return the device in read mode.
3. When the block address is specified, any address in the selected block address space is acceptable. However when
4. DQ7 must be checked since DQ5 and DQ7 may change simultaneously.
5. If this flowchart location is reached because DQ5=’1’, then the Write to Buffer Program command failed. If this flowchart
loading write buffer address with data, all addresses must fall within the selected write buffer page.
location is reached because DQ1=’1’, then the Write to Buffer Program command aborted. In both cases, the appropriate
reset command must be issued to return the device in read mode: a Reset command if the operation failed, a Write to
Buffer Program Abort and Reset command if the operation aborted.
Flowcharts
YES
NO
DQ1 = 1
NO
Write to Buffer Program
Confirm, block address
Check Status Register
Read Status Register
Program Address Pair
(DQ1, DQ5, DQ7) at
last loaded address
last loaded address
FAIL OR ABORT
Write Buffer Data,
(DQ5, DQ7) at
Write to Buffer
block address
block address
Write Next Data,
start address
DQ7 = Data
DQ7 = Data
Abort Write
command,
Write n
to Buffer
DQ5 = 1
X = X-1
X = 0
Start
YES
X=n
(4)
NO
NO
YES
NO
NO
(1)
,
(5)
YES
YES
(3)
YES
Program Aborted
Write to Buffer and
Write to a different
block address
Write to Buffer and Program command
END
First three cycles of the
(2)
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