M58LW032D 데이터 시트보기 (PDF) - STMicroelectronics

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M58LW032D

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

STMicroelectronics 

Figure 22. Protection Register Program Flowchart and Pseudo Code

M58LW032D

Start

Write C0h

Write

PR Address, PR Data

Read Status Register

SR7 = 1

NO

YES

YES

SR3, SR4 = 1,1

VPEN Invalid Error

NO

YES

SR1, SR4 = 0,1

NO

Protection Register

Program Error

YES

SR1, SR4 = 1,1

NO

Protection Register

Program Error

Write FFh

PR Program

Sucessful

Note: PR = Protection Register

Protection Register Program Command

– write C0h

– write Protection Register Address,

Protection Register Data

do:

– read status register

while SR7 = 1

If SR3 = 1, SR4 = 1 VPEN Invalid Error

If SR1 = 0, SR4 = 1 Protection Register

Program Error

If SR1 = 1, SR4 = 1 Program Error due to

Protection Register Protection

Read Memory Array Command:

– write FFh

AI06159b

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