M29W040-100K1R STMICROELECTRONICS [STMicroelectronics], M29W040-100K1R Datasheet - Page 25

• Manufacturer Part Number: M29W040-100K1R
• Description: 4 Mbit 512Kb x8, Uniform Block Low Voltage Single Supply Flash Memory
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Figure 14. Block Unprotecting Flowchart
Note: 1. A6 is kept at V
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 4 s
Wait 4 s
Wait 4 s
W = V IH
W = V IL
START
DATA
n = 0
00h
=
YES
SECT.
PASS
LAST
YES
INCREMENT
NO
BLOCK
AI01371E
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