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M29W040 Datasheet(PDF) 2 Page - STMicroelectronics

Part No. M29W040
Description  4 Mbit 512Kb x8, Uniform Block Low Voltage Single Supply Flash Memory
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M29W040 Datasheet(HTML) 2 Page - STMicroelectronics

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background image
A1
A0
DQ0
A7
A4
A3
A2
A6
A5
A13
A10
A8
A9
DQ7
A14
A11
G
E
DQ5
DQ1
DQ2
DQ3
DQ4
DQ6
A17
W
A16
A12
A18
VCC
A15
AI02076
M29W040
(Normal)
8
1
9
16
17
24
25
32
VSS
Figure 2B. TSOP Pin Connections
AI02075
A13
A10
17
A1
A0
DQ0
A7
A4
A3
A2
A6
A5
9
A8
1
A9
DQ7
A14
32
M29W040
A11
G
E
25
Figure 2A. LCC Pin Connections
A1
A0
DQ0
A7
A4
A3
A2
A6
A5
A13
A10
A8
A9
DQ7
A14
A11
G
E
DQ5
DQ1
DQ2
DQ3
DQ4
DQ6
A17
W
A16
A12
A18
VCC
A15
AI02077
M29W040
(Reverse)
8
1
9
16
17
24
25
32
VSS
Figure 2C. TSOP Reverse Pin Connections
DESCRIPTION
The M29W040 is a non-volatile memory that may
be erased electrically at the block level, and pro-
grammed Byte-by-Byte.
The interface is directly compatible with most mi-
croprocessors. PLCC32, TSOP32 (8 x 20mm) and
TSOP32 (8 x 14mm) packages are available. Both
normal and reverse pin outs are available for the
TSOP32 (8 x 20mm) package.
Organisation
The FlashMemory organisation is 512K x8 bits with
Address lines A0-A18 and Data Inputs/Outputs
DQ0-DQ7. Memory control is provided by Chip
Enable, Output Enable and Write Enable Inputs.
Erase and Program are performed through the
internal Program/Erase Controller (P/E.C.).
Data Outputs bits DQ7 and DQ6 provide polling or
toggle signals during Automatic Program or Erase
to indicate the Ready/Busy state of the internal
Program/Erase Controller.
Memory Blocks
Erasure of the memory is in blocks. There are 8
uniform blocks of 64 Kbytes each in the memory
address space. Each block can be programmed
and erased over 100,000 cycles. Each uniform
2/31
M29W040


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