AMC0XXCFLKA Datasheet, PDF (22/42 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
Activity
EF = Error Flag = 0
SEG ADRS = Segment Address = 0
Write ERS cycle
#1–5
Write SEGADRS/ERS
cycle #6
Wait 3 seconds
Read SEG
ADRS/FMD
Yes _{FMD = FFH}
No
Begin software
polling subroutine
(Figure 11)
ERS =Erase Command Sequence
(Even byte per Table 3, Odd byte per Table 4)
3 seconds wait = 2 seconds memory segment
preprogram time +1 second
memory segment erase time
FMD = Flash Memory Data
FFH = Erased Flash Memory Data
FMD = FFH ^No
Yes
Increment SEG ADRS
Erase Error
Yes _{Last Segment}
Address
No
Erase Complete
Figure 10. Byte-Wide Erasure Flow Chart
18723C-11
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AmC0XXCFLKA
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