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Numonyx <strong>Wireless</strong> <strong>Flash</strong> <strong>Memory</strong> (<strong>W30</strong>) (<strong>W30</strong>)<br />
address used in the Erase Setup command. For example, if the Erase Confirm<br />
command is given to partition B, then the selected block in partition B is erased, even if<br />
the Erase Setup command was to partition A.<br />
The 2-cycle erase sequence cannot be interrupted with a bus write operation. For<br />
example, to execute properly, an Erase Setup command must be immediately followed<br />
by the Erase Confirm command. If a different command is issued between the setup<br />
and confirm commands, the following occurs:<br />
• The partition is placed in read-status mode.<br />
• The status register signals a command sequence error.<br />
• All subsequent erase commands to that partition are ignored until the status<br />
register is cleared.<br />
To detect block erase completion, the CPU analyzes SR[7] of that partition. If an error bit<br />
(SR[5,3,1]) was flagged, the status register can be cleared by issuing the Clear Status Register<br />
command before attempting the next operation. The partition remains in read-status<br />
mode until another command is written to its CUI. Any CUI instruction can follow after<br />
erasing completes. The CUI can be set to read-array mode to prevent inadvertent<br />
status register reads.<br />
Datasheet November 2007<br />
68 Order Number: 290702-13
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