AMC0XXCFLKA Datasheet, PDF (26/42 Pages) Advanced Micro Devices – 1, 2, 4, or 10 Megabyte 5.0 V-only Flash Memory PC Card

EMBEDDED ALGORITHMS
Start
Subroutine
Read Byte
(D0–D7)
Addr = VA
D7 = V_data? ^No
Yes
D5 = 1?
Yes
VA = Word Address for Programming
V_data = Valid data
D5/13 = 1?
No
Yes = Erase time has exceeded limit, device failed
No = Erase time has not exceeded limit
Read Byte
(D0–D7)
Addr = VA
D7 = V_data? ^No
Yes
Low byte program
time exceeded limit,
EF = 1
Read Byte
(D8–D15)
Addr = VA
D15 = V_data? ^No
Yes
D13 = 1? ^No
Yes
Read Byte
(D8–D15)
Addr = VA
D15 = V_data? ^No
Yes
High byte program
time exceeded limit,
EF = 2 + EF
Subroutine
Return
Figure 14. Word-Wide Software Polling Program Subroutine
18723C-15
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AmC0XXCFLKA
5/4/98