AT25DF321A Datasheet, PDF (18/58 Pages) ATMEL Corporation – 32-Megabit 2.7-volt Minimum SPI Serial Flash Memory

operation is not allowed to a sector that has been program suspended. If attempted, the erase
operation will abort and the WEL bit in the Status Register will be reset to a logical “0” state.
During an Erase Suspend, a program operation to a different 64-Kbyte sector can be started and
subsequently suspended. This results in a simultaneous Erase Suspend/Program Suspend con-
dition and will be indicated by the states of both the ES and PS bits in the Status Register being
set to the logical “1” state.
If a Reset operation (see “Reset” on page 42) is performed while a sector is erase suspended,
the suspend operation will abort and the contents of the block in the suspended sector will be left
in an undefined state. However, if a Reset is performed while a sector is program suspended,
the suspend operation will abort but only the contents of the page that was being programmed
and subsequently suspended will be undefined. The remaining pages in the 64-Kbyte sector will
retain their previous contents.
If an attempt is made to perform an operation that is not allowed during a program or erase sus-
pend, such as a Protect Sector operation, then the device will simply ignore the opcode and no
operation will be performed. The state of the WEL bit in the Status Register, as well as the SPRL
(Sector Protection Registers Locked) and SLE (Sector Lockdown Enabled) bits, will not be
affected.
18 AT25DF321A [Preliminary]
3686C–DFLASH–12/08