S29GL-A SPANSION [SPANSION], S29GL-A Datasheet - Page 52

• Manufacturer Part Number: S29GL-A
• Description: S29GL-A MirrorBit Flash Family
• Manufacturer: SPANSION [SPANSION]

50
Chip Erase Command Sequence
DQ7 or DQ6 status bits, just as in the standard program operation. See
Operation Status on page 56
The system must write the Program Resume command (address bits are don’t
care) to exit the Program Suspend mode and continue the programming opera-
tion. Further writes of the Resume command are ignored. Another Program
Suspend command can be written after the device resumes programming.
Chip erase is a six bus cycle operation. The chip erase command sequence is ini-
tiated 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 re-
quire 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 con-
trols or timings during these operations.
page 55
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
tus on page 56
Any commands written during the chip erase operation are ignored. However,
note that a hardware reset immediately terminates the erase operation. If this
show the address and data requirements for the chip erase command
No
for information on these status bits.
Figure 5. Program Suspend/Program Resume
Sequence in Progress
Program Operation
Write address/data
Write address/data
Program Suspend
or Write-to-Buffer
Device reverts to
operation prior to
Read data as
XXXh/B0h
Wait 15 µs
XXXh/30h
required
reading?
S29GL-A MirrorBit™ Flash Family
Done
A d v a n c e
Yes
for more information.
Write Program Suspend
Command Sequence
Command is also valid for
Erase-suspended-program
operations
Autoselect and SecSi Sector
read operations are also allowed
Data cannot be read from erase- or
program-suspended sectors
Write Program Resume
Command Sequence
Table 30 on page 54
I n f o r m a t i o n
Write Operation Sta-
and
Table 31 on
Write
S29GL-A_00_A3 April 22, 2005