M29W320DB STMICROELECTRONICS [STMicroelectronics], M29W320DB Datasheet - Page 53

• Manufacturer Part Number: M29W320DB
• Description: 32 Mbit 4Mb x8 or 2Mb x16, Boot Block 3V Supply Flash Memory
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M29W320DT, M29W320DB
Figure 19. In-System Equipment Chip Unprotect Flowchart
ISSUE READ/RESET
NO
COMMAND
RP = V IH
= 1000
FAIL
++n
YES
ADDRESS = CURRENT BLOCK ADDRESS
ADDRESS = CURRENT BLOCK ADDRESS
A0 = V IL , A1 = V IH , A6 = V IH
A0 = V IL , A1 = V IH , A6 = V IH
A0 = V IL , A1 = V IH , A6 = V IH
A0 = V IL , A1 = V IH , A6 = V IH
PROTECT ALL BLOCKS
CURRENT BLOCK = 0
ANY ADDRESS WITH
ANY ADDRESS WITH
NO
READ DATA
WRITE 60h
WRITE 60h
WRITE 40h
Wait 10ms
RP = V ID
Wait 4µs
START
DATA
n = 0
00h
=
YES
ISSUE READ/RESET
COMMAND
RP = V IH
BLOCK
PASS
LAST
YES
CURRENT BLOCK
INCREMENT
NO
Block Protection
AI03472
53/56