M29W400B STMICROELECTRONICS [STMicroelectronics], M29W400B Datasheet - Page 28
![no-image](/images/no-image-200.jpg)
M29W400B
Manufacturer Part Number
M29W400B
Description
4 Mbit 512Kb x8 or 256Kb x16, Boot Block Low Voltage Single Supply Flash Memory
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.M29W400B.pdf
(34 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
M29W400B-70N6
Manufacturer:
ST
Quantity:
832
Company:
Part Number:
M29W400BB
Manufacturer:
ROMH
Quantity:
10 000
Company:
Part Number:
M29W400BB-55N3
Manufacturer:
ST
Quantity:
190
Company:
Part Number:
M29W400BB-70N1
Manufacturer:
ST
Quantity:
9 040
Company:
Part Number:
M29W400BB-70N6
Manufacturer:
ST
Quantity:
46
M29W400T, M29W400B
Figure 15. All Blocks Unprotecting Flowchart
28/34
NO
A9 = V IH
= 1000
FAIL
++n
YES
E, A0 = V IL ; A1, A6 = V IH ; A9 = V ID
A12-A17 IDENTIFY BLOCK
NO
PROTECT STATUS
VERIFY BLOCK
A12, A15 = V IH
E, G, A9 = V ID
ALL BLOCKS
E, G = V IH
PROTECT
Wait 10ms
Wait 60ns
Wait 4 s
Wait 4 s
W = V IH
W = V IH
W = V IL
G = V IL
START
DATA
n = 0
00h
=
YES
Unprotect
A9 = V IH
Set-up
PASS
Verify
LAST
BLK.
YES
NO
BLOCK
NEXT
AI01876C