S29GL128S SPANSION [SPANSION], S29GL128S Datasheet - Page 33

• Manufacturer Part Number: S29GL128S
• Manufacturer: SPANSION [SPANSION]

March 16, 2012 S29GL_128S_01GS_00_06
5.3.4.2
Sector Erase
The sector erase function erases one sector in the memory array. The device does not require the system to
preprogram prior to erase. The Embedded Erase algorithm automatically programs and verifies the entire
sector for an all 0 data pattern prior to electrical erase. After a successful sector erase, all locations within the
erased sector contain FFFFh. The system is not required to provide any controls or timings during these
operations. The sector 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 address of the sector to be erased,
and the sector erase command.
The system can determine the status of the erase operation by reading the Status Register or using Data
Polling. Refer to
on page 38
Once the sector erase operation has begun, the Status Register Read and Erase Suspend commands are
valid. All other commands are ignored. However, note that a hardware reset immediately terminates the
erase operation and returns to read mode after t
erase command sequence must be reinitiated once the device has reset operation to ensure data integrity.
See
Sectors protected by the ASP DYB and PPB lock bits will not be erased. See
Embedded Algorithm Controller (EAC) on page 25
PASS. Device returns
for more information.
to reading array.
Status Register on page 37
Yes
D a t a
Write Sector Erase Cycles:
Sector Address, Data 30h
Address 555h, Data AAh
Address 2AAh, Data 55h
Address 555h, Data AAh
Address 555h, Data 80h
Perform Write Operation
Address 2AAh, Data 55h
Write Unlock Cycles:
Status Algorithm
Erase Error?
Done?
GL-S MirrorBit
S h e e t
Figure 5.4 Sector Erase Operation
No
Yes
FAIL. Write reset command
to return to reading array.
for information on these status bits. Refer to
RPH
No
®
Family
time. If a sector erase operation is terminated, the sector
for parameters and timing diagrams.
Unlock Cycle 1
Unlock Cycle 2
Command Cycle 1
Command Cycle 2
Command Cycle 3
Specify first sector for erasure
Status may be obtained by Status Register Polling
or Data Polling methods.
Error condition (Exceeded Timing Limits)
ASP on page
Data Polling Status
19.
33