M58BF008 Datasheet, PDF (30/36 Pages) STMicroelectronics – 8 Mbit 256Kb x32, Burst Flash Memory

M58BF008
Figure 16. Command Interface and Program Erase Controller Flowchart (a)
WAIT FOR
COMMAND
WRITE (1)
NO
90h
YES
READ
ARRAY
READ
SIGNATURE
NO
06h
YES
OBEB
TOGGLE
NO
70h
YES
READ
STATUS
NO
30h
YES
WRAPPING
TOGGLE
NO
50h
YES
CLEAR
STATUS
NO
04h
YES
NO
YES
READY
PROGRAM
OB SET-UP
NO
02h
YES
ERASE
A
OB SET-UP
PROGRAM
OB
NO
0Dh
READ
STATUS
NO
YES
READY
ERASE
OB
ERASE
COMMAND
ERROR
D
B
AI02682
Note: 1. If no command is written, the Command Interface remains in its previous valid state. Upon power-up, on exit from power-down or
if V_DD falls below V_LKO, the Command Interface defaults to Read Array mode.
2. P/E.C. status (Ready or Busy) is read on Status Register bit 7.
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