M29W800DT NUMONYX [Numonyx B.V], M29W800DT Datasheet - Page 50

• Manufacturer Part Number: M29W800DT
• Description: 8-Mbit (1 Mbit x 8 or 512 Kbits x 16, boot block) 3 V supply flash memory
• Manufacturer: NUMONYX [Numonyx B.V]

Block protection
50/52
Figure 21. 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
M29W800DT, M29W800DB
COMMAND
RP = V IH
BLOCK
PASS
LAST
YES
CURRENT BLOCK
INCREMENT
NO
AI03472