M29W640FB STMICROELECTRONICS [STMicroelectronics], M29W640FB Datasheet - Page 70

• Manufacturer Part Number: M29W640FB
• Description: 64 Mbit (8Mb x8 or 4Mb x16, Page, Boot Block) 3V Supply Flash Memory
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

9 Part Numbering
Figure 19. In-System Equipment Chip Unprotect Flowchart
1. Block Protection Groups are shown in
70/72
ISSUE READ/RESET
NO
COMMAND
RP = V IH
= 1000
FAIL
++n
YES
Appendix
ADDRESS = CURRENT GROUP ADDRESS
ADDRESS = CURRENT GROUP ADDRESS
A, Tables
A0, A2, A3 = V IL , A1, A6 = V IH
A0, A2, A3, A6 = V IL , A1 = V IH
A0, A2, A3 = V IL , A1, A6 = V IH
A0, A2, A3 = V IL , A1, A6 = V IH
PROTECT ALL GROUPS
CURRENT GROUP = 0
ANY ADDRESS WITH
ANY ADDRESS WITH
NO
READ DATA
WRITE 60h
WRITE 60h
WRITE 40h
20
Wait 10ms
RP = V ID
Wait 4µs
START
DATA
n = 0
and 21.
00h
=
YES
ISSUE READ/RESET
COMMAND
M29W640FT, M29W640FB
RP = V IH
GROUP
PASS
LAST
YES
CURRENT GROUP
INCREMENT
NO
AI11564