M58BW016BB ST Microelectronics, M58BW016BB Datasheet - Page 53

• Manufacturer Part Number: M58BW016BB
• Description: 16 Mbit 512Kb x32 / Boot Block / Burst 3V Supply Flash Memories
• Manufacturer: ST Microelectronics

Figure 25. Unlock Device and Change Tuning Protection Code Flowchart
Issue
Read
command
Add: don't care
Data: 0xFFh
DEVICE LOCKED
NO
Data: Second 32 bit
Data: First 32 bit
Add: 0x00000h
Add: 0x00001h
Add: don't care
Add: don't care
by tuning code
Device locked
Read Status
Data: 0x78h
Data: 0x78h
Register
b7 = 1
b7 = 1
b0 = 1
Reset
YES
YES
YES
DEVICE UNLOCKED
M58BW016BT, M58BW016BB, M58BW016DT, M58BW016DB
1st: Write Cycle
2nd: Write Cycle
(old code,
factory setup = 0xFFFFh)
3rd: Write Cycle
4th: Write Cycle
(old code,
factory setup = 0xFFFFh)
TUNING PROTECTION
UNLOCK SEQUENCE
Data: Second 32 bit
Data: First 32 bit
Add: don't care
Add: 0x00000h
Add: don't care
Add: 0x00001h
Add: don't care
Device locked
by new code
Data: 0x48h
Data: 0x48h
Data: 0xFFh
b7 = 1
b7 = 1
Reset
YES
YES
Issue Read command
5th: Write Cycle
6th: Write Cycle
7th: Write Cycle
(new code)
8th: Write Cycle
9th: Write Cycle
(new code)
AI04501
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