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M29W400B Datasheet(PDF) 25 Page - STMicroelectronics

Part # M29W400B
Description  4 Mbit 512Kb x8 or 256Kb x16, Boot Block Low Voltage Single Supply Flash Memory
PDF  34 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M29W400B Datasheet(HTML) 25 Page - STMicroelectronics

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READ DQ5 & DQ7
at VALID ADDRESS
START
READ DQ7
FAIL
PASS
AI01369
DQ7
=
DATA
YES
NO
YES
NO
DQ5
=1
DQ7
=
DATA
YES
NO
Figure 11. Data Polling Flowchart
READ
DQ2, DQ5 & DQ6
START
READ DQ2, DQ6
FAIL
PASS
AI01873
DQ2, DQ6
=
TOGGLE
NO
NO
YES
YES
DQ5
=1
NO
YES
DQ2, DQ6
=
TOGGLE
Figure 12. Data Toggle Flowchart
Parameter
M29W400T / M29W400B
Unit
Min
Typ
Typical after
100k W/E Cycles
Chip Erase (Preprogrammed)
1.5
1.7
sec
Chip Erase
6.7
7.0
sec
Boot Block Erase
0.7
sec
Parameter Block Erase
0.6
sec
Main Block (32Kb) Erase
0.9
sec
Main Block (64Kb) Erase
1.4
sec
Chip Program (Byte)
7.5
7.5
sec
Byte Program
10
10
µs
Word Program
16
16
µs
Program/Erase Cycles (per Block)
100,000
cycles
Table 18. Program, Erase Times and Program, Erase Endurance Cycles
(TA = 0 to 70
°C; VCC = 2.7V to 3.6V)
25/34
M29W400T, M29W400B



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