m58bw032bb STMicroelectronics, m58bw032bb Datasheet - Page 50

• Manufacturer Part Number: m58bw032bb
• Description: 32 Mbit 1mb X32, Boot Block, Burst 3.3v Supply Flash Memory
• Manufacturer: STMicroelectronics

M58BW032BT, M58BW032BB, M58BW032DT, M58BW032DB
Figure 24. Unlock Device and Change Tuning Protection Code Flowchart
50/60
Issue
Read
command
Add: don't care
DEVICE LOCKED
Data: FFh
NO
Data: Second 32 bit
Data: First 32 bit
Add: don't care
Add: don't care
by tuning code
Device locked
Add: 00000h
Add: 00001h
Read Status
Data: 78h
Data: 78h
Register
b7 = 1
b7 = 1
b0 = 1
Reset
YES
YES
YES
DEVICE UNLOCKED
1st: Write Cycle
2nd: Write Cycle
(old code,
factory setup = FFFFh)
3rd: Write Cycle
4th: Write Cycle
(old code,
factory setup = FFFFh)
TUNING PROTECTION
UNLOCK SEQUENCE
Data: Second 32 bit
Data: First 32 bit
Add: don't care
Device locked
Add: 00000h
Add: 00001h
by new code
Add: AAh
Add: AAh
Data: 48h
Data: 48h
Data: FFh
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)
AI04501b