AMC0XXDFLKA Datasheet, PDF (25/46 Pages) Advanced Micro Devices – 4, 8, 20, or 32 Megabyte 5.0 Volt-only Flash Memory PC Card

EMBEDDED ALGORITHMS
Begin
Erase
Initialization:
EF = 0
SEG ADRS = 0
Activity
ERS = Erase Command Sequence
(Even byte per Table 3, Odd byte per Table 4)
SEG ADRS = Segment Address = 0
EF = Error Flag = 0
Write ERS
Cycle#1–5
Write SEGADRS/ERS
Cycle #6
Read SEG
ADRS/FMD
Yes
FMD = FFH
No
Begin software
polling subroutine
(Figure 11)
FMD = Flash Memory Data
FFH = Erased Flash Memory Data
FMD = FFH ^No
Yes
Increment SEG ADRS
Erase Error
No
Last Segment
Address
Yes
Erase Complete
Figure 10. Byte-Wide Erasure Flow Chart
AmC0XXDFLKA
19521D-11
25