S29GL01GP
S29GL512P
S29GL256P
S29GL128P
Figure 7.3 Sector Erase Operation
Write Unlock Cycles:
Address 555h, Data AAh
Address 2AAh, Data 55h
Unlock Cycle 1
Unlock Cycle 2
Write Sector Erase Cycles:
Address 555h, Data 80h
Address 555h, Data AAh
Address 2AAh, Data 55h
Sector Address, Data 30h
Command Cycle 1
Command Cycle 2
Command Cycle 3
Specify first sector for erasure
Select
Additional
Sectors?
No
Yes
Write Additional
Sector Addresses
• Each additional cycle must be written within tSEA timeout
• The host system may monitor DQ3 or wait tSEA to ensure
acceptance of erase commands
• No limit on number of sectors
Yes
Last Sector
Selected?
No
• Commands other than Erase Suspend or selecting additional
sectors for erasure during timeout reset device to reading array
data
Poll DQ3.
DQ3 = 1?
No
Yes
Perform Write Operation
Status Algorithm
(see Figure 7.4)
Status may be obtained by reading DQ7, DQ6 and/or DQ2.
Yes
Done?
No
No
Error condition (Exceeded Timing Limits)
DQ5 = 1?
Yes
PASS. Device returns
to reading array.
FAIL. Write reset command
to return to reading array.
Notes
1. See Table on page 65 for erase command sequence.
2. See DQ3: Sector Erase Timeout State Indicator on page 35 for information on the sector erase timeout.
Document Number: 002-00886 Rev. *B
Page 26 of 83
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