AMC0XXCFLKA Datasheet, PDF (27/42 Pages) Advanced Micro Devices – 1, 2, 4, or 10 Megabyte 5.0 V-only Flash Memory PC Card

EMBEDDED ALGORITHMS
Begin
Erase
Initialization:
EF = 0
SEG ADRS = 0
Write ERS
cycle #1–5
Write ERS
cycle #6:
SEG ADRS
Wait 3 seconds
Read SEG
ADRS/FMD
Yes _{FMD = FFFFH}
No
Begin software
polling subroutine
(Figure 16)
Activity
EF = Error Flag
EF = 0 = No failure
EF = 1 = Low byte erase error
EF = 2 = High byte erase error
EF = 3 = Word-wide erase error
SEG ADRS = Segment Address
ERS = Segment Erase Command Sequence (Table 5)
FMD = Flash Memory Data
FMD = FFFFH ^No
Yes
Increment SEG ADRS
Erase Error
Yes _{Last Segment}
Address
No
Erase Complete
Figure 15. Word-Wide Erasure Flow Chart
18723C-16
5/4/98
AmC0XXCFLKA
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