m58bw032bb STMicroelectronics, m58bw032bb Datasheet - Page 52

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

M58BW032BT, M58BW032BB, M58BW032DT, M58BW032DB
Figure 26. Unlock Device and Erase a Tuning Protected Block Flowchart
52/60
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
(First part
of the tuning code)
3rd: Write Cycle
4th: Write Cycle
(Second part
of the tuning code)
TUNING PROTECTION
UNLOCK SEQUENCE
Add: block to erase
Add: don't care
Status Register
Data: FFh
Data: D0h
Data: 20h
Add: 55h
Erased
b7 = 1
check
Block
YES
Issue Read command
5th: Write Cycle
6th: Write Cycle
7th: Write Cycle
AI04503b