m58lw032d STMicroelectronics, m58lw032d Datasheet - Page 45

• Manufacturer Part Number: m58lw032d
• Description: 32 Mbit 4mb X8, 2mb X16, Uniform Block 3v Supply Flash Memory
• Manufacturer: STMicroelectronics

Figure 22. Protection Register Program Flowchart and Pseudo Code
Note: PR = Protection Register
PR Address, PR Data
Read Status Register
SR1, SR4 = 0,1
SR1, SR4 = 1,1
SR3, SR4 = 1,1
PR Program
Write C0h
Write FFh
Sucessful
SR7 = 1
Write
Start
NO
NO
YES
NO
YES
YES
YES
NO
Protection Register
V PEN Invalid Error
Protection Register
Program Error
Program Error
while SR7 = 1
Protection Register Program Command
– write C0h
– write Protection Register Address,
do:
– read status register
If SR3 = 1, SR4 = 1 V PEN Invalid Error
Read Memory Array Command:
– write FFh
If SR1 = 0, SR4 = 1 Protection Register
If SR1 = 1, SR4 = 1 Program Error due to
Protection Register Data
Protection Register Protection
Program Error
M58LW032D
AI06159b
45/50