D a t a S h e e t
Figure 10.3 Program Suspend/Program Resume
Program Operation
or Write-to-Buffer
Sequence in Progress
Write Program Suspend
Command Sequence
Write address/data
XXXh/B0h
Command is also valid for
Erase-suspended-program
operations
Wait 20 μs
Autoselect and SecSi Sector
read operations are also allowed
Read data as
required
Data cannot be read from erase- or
program-suspended sectors
Done
No
reading?
Yes
Write Program Resume
Command Sequence
Write address/data
XXXh/30h
Device reverts to
operation prior to
Program Suspend
10.6 Chip Erase Command Sequence
Chip erase is a six bus cycle operation. The chip erase command sequence is initiated by writing two unlock
cycles, followed by a set-up command. Two additional unlock write cycles are then followed by the chip erase
command, which in turn invokes the Embedded Erase algorithm. The device does not require the system to
preprogram prior to erase. The Embedded Erase algorithm automatically preprograms and verifies the entire
memory for an all zero data pattern prior to electrical erase. The system is not required to provide any
controls or timings during these operations. Table 10.1 on page 51 and Table 10.3 on page 53 show the
address and data requirements for the chip erase command sequence.
When the Embedded Erase algorithm is complete, the device returns to the read mode and addresses are no
longer latched. The system can determine the status of the erase operation by using DQ7, DQ6, or DQ2.
Refer to Write Operation Status on page 55 for information on these status bits.
Any commands written during the chip erase operation are ignored. However, note that a hardware reset
immediately terminates the erase operation. If this occurs, the chip erase command sequence should be
reinitiated once the device returns to reading array data, to ensure data integrity.
Figure 10.4 on page 49 illustrates the algorithm for the erase operation. Refer to Table 15.3 on page 67 for
parameters, and Figure 15.7 on page 69 for timing diagrams.
November 16, 2007 S29GL-N_01_09
S29GL-N MirrorBit® Flash Family
47
SPANSION [ SPANSION ]
