W78M32VP-XBX
FIGURE 7 – 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
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 12.1 on page 69 for earse command sequence.
2. See DQ3: Sector Erase Timeout State Indicator on page 39 for information on the sector erase timeout.
Microsemi Corporation reserves the right to change products or specifications without notice.
August 2011 © 2011 Microsemi Corporation. All rights reserved.
Rev. 15
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