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M29W400BB90ZA6 Datasheet(PDF) 3 Page - STMicroelectronics

Part # M29W400BB90ZA6
Description  4 Mbit (512Kb x8 or 256Kb x16, Boot Block) Low Voltage Single Supply Flash Memory
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M29W400BB90ZA6 Datasheet(HTML) 3 Page - STMicroelectronics

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M29W400BT, M29W400BB
Figure 4. TFBGA Connections (Top view through package)
AI03988
B
A
4
3
2
1
G
F
H
DQ15
A–1
A7
A3
DQ10
DQ8
E
DQ13
DQ11
DQ9
G
VSS
DQ6
DQ1
VSS
DQ14
A12
NC
A17
A4
A14
A10
NC
NC
A6
A2
RP
A8
DQ4
DQ3
VCC
DQ12
A9
BYTE
A15
A11
NC
A1
A16
DQ7
DQ5
DQ2
A0
NC
DQ0
A5
E
D
C
RB
W
A13
6
5
The blocks in the memory are asymmetrically ar-
ranged, see Tables 3 and 4, Block Addresses. The
first or last 64 Kbytes have been divided into four
additional blocks. The 16 Kbyte Boot Block can be
used for small initialization code to start the micro-
processor, the two 8 Kbyte Parameter Blocks can
be used for parameter storage and the remaining
32K is a small Main Block where the application
may be stored.
Chip Enable, Output Enable and Write Enable sig-
nals control the bus operation of the memory.
They allow simple connection to most micropro-
cessors, often without additional logic.
The memory is offered in TSOP48 (12 x 20mm),
TFBGA48 (0.8mm pitch) and SO44 packages and
it is supplied with all the bits erased (set to ’1’).


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