M58LW064C Datasheet, PDF (57/61 Pages) STMicroelectronics – 64 Mbit (4Mb x16, Uniform Block, Burst) 3V Supply Flash Memory

Figure 30. Command Interface and Program Erase Controller Flowchart (a)
M58LW064C
WAIT FOR
COMMAND
WRITE
NO
90h
YES
READ
SIGNATURE
NO
98h
YES
CFI
QUERY
NO
70h
YES
READ
STATUS
NO
50h
YES
READ
ARRAY
CLEAR
STATUS
NO
E8h
YES
PROGRAM
BUFFER
LOAD
NO
20h⁽¹⁾
YES
NO
D0h
ERASE
SET-UP
NO
FFh
YES
PROGRAM
COMMAND
ERROR
YES
C
NO
D0h
YES
A
ERASE
COMMAND
ERROR
B
Note 1. The Erase command (20h) can only be issued if the flash is not already in Erase Suspend.
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