M58LW032D 데이터 시트보기 (PDF) - STMicroelectronics

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M58LW032D

32 Mbit (4Mb x8, 2Mb x16, Uniform Block) 3V Supply Flash Memory

STMicroelectronics 

Figure 18. Erase Flowchart and Pseudo Code

Start

M58LW032D

Write 20h

Write D0h to

Block Address

Erase command:

– write 20h

– write D0h to Block Address

(A12-A17)

(memory enters read Status

Register after the Erase command)

Read Status

Register

NO

Suspend

YES

do:

– read status register

– if Program/Erase Suspend command

given execute suspend erase loop

NO

SR7 = 1

Suspend

Loop

while SR7 = 1

YES

NO

SR3 = 0

YES

VPEN Invalid

Error (1)

If SR3 = 1, VPEN invalid error:

– error handler

NO

SR4, SR5 = 0

YES

Command

Sequence Error

If SR4, SR5 = 1, Command Sequence error:

– error handler

NO

SR5 = 0

YES

Erase

Error (1)

If SR5 = 1, Erase error:

– error handler

NO

SR1 = 0

YES

End

Erase to Protected

Block Error

If SR1 = 1, Erase to Protected Block Error:

– error handler

AI00613C

Note: 1. If an error is found, the Status Register must be cleared (Clear Status Register Command) before further Program or Erase oper-

ations.

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