M58LW032A 데이터 시트보기 (PDF) - STMicroelectronics

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M58LW032A

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

STMicroelectronics 

M58LW032A

Figure 25. Erase Flowchart and Pseudo Code

Start

Write 20h

Write D0h to

Block Address

Read Status

Register

NO

b7 = 1

YES

NO

b3 = 0

YES

NO

b4, b5 = 0

YES

NO

b5 = 0

YES

NO

b1 = 0

YES

End

NO

Suspend

YES

Suspend

Loop

VPP Invalid

Error (1)

Command

Sequence Error

Erase

Error (1)

Erase to Protected

Block Error

Erase command:

– write 20h

– write D0h to Block Address

(A12-A17)

(memory enters read Status

Register after the Erase command)

do:

– read status register

– if Program/Erase Suspend command

given execute suspend erase loop

while b7 = 1

If b3 = 1, VPP invalid error:

– error handler

If b4, b5 = 1, Command Sequence error:

– error handler

If b5 = 1, Erase error:

– error handler

If b1 = 1, Erase to Protected Block Error:

– error handler

AI00613B

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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