S29PL064J70BFI120 Spansion Inc., S29PL064J70BFI120 Datasheet - Page 60

• Manufacturer Part Number: S29PL064J70BFI120
• Description: Flash Memory
• Manufacturer: Spansion Inc.

15.6
60
Chip Erase Command Sequence
Note
See
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.
for the chip erase command sequence.
When the Embedded Erase algorithm is complete, that bank 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, DQ2, or RY/
BY#. Refer to
Any commands written during the chip erase operation are ignored. Note that Secured Silicon Sector,
autoselect, and CFI functions are unavailable when a [program/erase] operation is in progress. However,
note that a hardware reset immediately terminates the erase operation. If that occurs, the chip erase
command sequence should be reinitiated once that bank has returned to reading array data, to ensure data
integrity.
Figure 15.2 on page 61
Operations on page 78
Table 15.1 on page 64
Write Operation Status on page 66
for program command sequence.
for parameters, and
illustrates the algorithm for the erase operation. Refer to the tables in
Increment Address
Figure 15.1 Program Operation
S29PL-J
Embedded
in progress
Table 15.1 on page 64
algorithm
Figure 20.8 on page 80
Program
D a t a
for information on these status bits.
No
S h e e t
Command Sequence
Write Program
Last Address?
Programming
from System
Verify Data?
Completed
Data Poll
START
shows the address and data requirements
for timing diagrams.
Yes
Yes
S29PL-J_00_A12 December 18, 2009
No
Erase/Program