m29f040 STMicroelectronics, m29f040 Datasheet - Page 26

• Manufacturer Part Number: m29f040
• Description: 4 Mbit 512kb X8, Uniform Block Single Supply Flash Memory
• Manufacturer: STMicroelectronics

M29F040
Note: 1. A6 is kept at V
26/31
Figure 14. Block Unprotecting Flowchart
reads, A6 must be kept at V
IH
during unprotection algorithm in order to secure best unprotection verification. During all other protection status
NO
= 1000
FAIL
++n
IL
YES
.
ADDRESS: A1, A6 = V IH , A0 = V IL and
A16, A17, A18 DEFINING BLOCK
READ at UNPROTECTION
NO
A6, A12, A16 = V IH
E, G, A9 = V IH
E, G, A9 = V ID
ALL BLOCKS
(see Note 1)
PROTECT
Wait 10ms
E, G = V IH
Wait 4µs
Wait 4µs
Wait 4µs
W = V IH
W = V IL
START
DATA
n = 0
00h
=
YES
SECT.
PASS
LAST
YES
INCREMENT
NO
BLOCK
AI01371E