M58BW016BT100T3(2003) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M58BW016BT100T3
(Rev.:2003)

16 Mbit (512Kb x32, Boot Block, Burst) 3V Supply Flash Memories

STMicroelectronics 

M58BW016BT, M58BW016BB, M58BW016DT, M58BW016DB

Figure 25. Unlock Device and Change Tuning Protection Code Flowchart

Reset

Device locked

by tuning code

TUNING PROTECTION

UNLOCK SEQUENCE

Add: don't care Issue Read command

Data: 0xFFh

5th: Write Cycle

Add: don't care

Data: 0x78h

1st: Write Cycle

Add: don't care

Data: 0x48h

6th: Write Cycle

Add: 0x00000h

Data: First 32 bit

2nd: Write Cycle

(old code,

factory setup = 0xFFFFh)

Add: 0x00000h 7th: Write Cycle

Data: First 32 bit (new code)

Add: don't care

Data: 0xFFh

Issue

Read

command

b7 = 1

YES

Add: don't care

Data: 0x78h

3rd: Write Cycle

b7 = 1

YES

Add: don't care

Data: 0x48h

8th: Write Cycle

Add: 0x00001h 4th: Write Cycle

Data: Second 32 bit (old code,

factory setup = 0xFFFFh)

Add: 0x00001h 9th: Write Cycle

Data: Second 32 bit (new code)

b7 = 1

YES

Read Status

Register

NO

DEVICE LOCKED

b0 = 1

YES

DEVICE UNLOCKED

b7 = 1

YES

Reset

Device locked

by new code

AI04501

53/63

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