S29GL01GS datasheet(33/104 Pages) SPANSION

33 / 104 page

December 21, 2012 S29GL_128S_01GS_00_07

GL-S MirrorBit® Family

Data

She e t

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. When WE# goes high, at the end of the 6th cycle, the RY/BY# goes low.

The system can determine the status of the erase operation by reading the Status Register or using Data

Polling. Refer to Status Register on page 37 for information on these status bits. Refer to Data Polling Status

on page 38 for more information.

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 tRPH time. If a sector erase operation is terminated, the sector

erase command sequence must be reinitiated once the device has reset operation to ensure data integrity.

See Embedded Algorithm Controller (EAC) on page 25 for parameters and timing diagrams.

Sectors protected by the ASP DYB and PPB lock bits will not be erased. See ASP on page 19.

Figure 5.4 Sector Erase Operation

Write Unlock Cycles:

Address 555h, Data AAh

Address 2AAh, Data 55h

Write Sector Erase Cycles:

Address 555h, Data 80h

Address 555h, Data AAh

Address 2AAh, Data 55h

Sector Address, Data 30h

FAIL. Write reset command

to return to reading array.

PASS. Device returns

to reading array.

Perform Write Operation

Status Algorithm

Unlock Cycle 1

Unlock Cycle 2

Yes

Done?

Erase Error?

Command Cycle 1

Command Cycle 2

Command Cycle 3

Specify first sector for erasure

Error condition (Exceeded Timing Limits)

Status may be obtained by Status Register Polling

or Data Polling methods.

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