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M29W641DU70N1E Datasheet(PDF) 5 Page - STMicroelectronics

Part # M29W641DU70N1E
Description  64 Mbit 4Mb x16, Uniform Block 3V Supply Flash Memory
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M29W641DU70N1E Datasheet(HTML) 5 Page - STMicroelectronics

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M29W641DH, M29W641DL, M29W641DU
SUMMARY DESCRIPTION
The M29W641D is a 64 Mbit (4Mb x16) non-vola-
tile memory that can be read, erased and repro-
grammed. These operations can be performed
using a single, low voltage, 2.7V to 3.6V VCC sup-
ply for the circuitry and a 1.8V to 3.6V VCCQ supply
for the Input/Output pins. An optional 12 V VPP
power supply is provided to speed up customer
programming.
On power-up the memory defaults to its Read
mode where it can be read in the same way as a
ROM or EPROM.
The highest address block of the M29W641DH or
the lowest address block of the M29W641DL can
be protected from accidental programming or era-
sure using the WP pin (if WP = VIL). The
M29W641DU does not feature the WP pin.
Each block can be erased independently so it is
possible to preserve valid data while old data is
erased. The blocks can be protected to prevent
accidental Program or Erase commands from
modifying the memory. Program and Erase com-
mands are written to the Command Interface of
the memory. An on-chip Program/Erase Controller
simplifies the process of programming or erasing
the memory by taking care of all of the special op-
erations that are required to update the memory
contents. The end of a program or erase operation
can be detected and any error conditions identi-
fied. The command set required to control the
memory is consistent with JEDEC standards.
The M29W641D has an extra block, the Extended
Block, (of 32 KWords) that can be accessed using
a dedicated command. The Extended Block can
be protected and so is useful for storing security
information. However the protection is not revers-
ible, once protected the protection cannot be un-
done.
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 a 48-pin TSOP package
(M29W641DL and M29W641DH) or in a 63-ball TF-
BGA package (M29W641DU). All devices are deliv-
ered with all the bits erased (set to 1).
Figure 2. Logic Diagram
Table 1. Signal Names
A0-A21
Address Inputs
DQ0-DQ7
Data Inputs/Outputs
DQ8-
DQ15
Data Inputs/Outputs
E
Chip Enable
G
Output Enable
W
Write Enable
RP
Reset/Block Temporary Unprotect
(M29W641DH and M29W641DL only)
RB
Ready/Busy Output (M29W641DU
only)
WP
Write Protect
VCC
Supply Voltage
VCCQ
Supply Voltage for Input/Output
VPP
Supply Voltage for Fast Program
(optional)
VSS
Ground
AI06697b
22
A0-A21
W
DQ0-DQ15
VCC
M29W641D
E
VSS
16
G
RP
VPP
WP
VCCQ
RB


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