M29W640GH70ZA6E NOR Flash Parallel 64Mbit Electronic Integrated Circuits

Product Specification

M29W640GH70ZA6E NOR Flash Parallel 64Mbit Electronic Integrated Circuits 

1. General Description

The M29W640G is a 64Mb (8Mb x8 or 4Mb x16) nonvolatile memory that can be read,
erased, and reprogrammed. These operations can be performed using a single low voltage
(2.7–3.6V) supply. Upon power-up, the device defaults to read mode.
The memory is divided into blocks that can be erased independently so that valid data
can be preserved while old data is erased. PROGRAM and ERASE commands 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 special operations
required to update the memory contents. The end of a PROGRAM or ERASE
operation can be detected and any error condition can be identified. The command set
required to control the device is consistent with JEDEC standards.
The M29W640GH and M29W640GL memory array is organized into 128 uniform blocks
of 64KB each (or 32Kwords each).
The M29W640GT and M29W640GB feature an asymmetric memory block, each having
an array of 135 blocks divided into 8 parameter blocks of 8KB each (or 4 Kwords each),
and 127 main blocks of 64KB each (or 32Kwords each). The M29W640GT has the parameter
blocks at the top of the memory array whereas the M29W640GB locates the parameter
blocks starting from the bottom.
Blocks are protected by groups to prevent accidental PROGRAM or ERASE commands
from modifying the memory.
The M29W640G supports asynchronous random read and page read from all blocks of
the array. Chip enable, output enable, and write enable signals control the bus operation.
They enable simple connection to most microprocessors, often without additional
logic.
The VPP/WP# signal is used to enable faster programming of the device. Protection from
PROGRAM/ERASE commands can be obtained by holding VPP/WP# to VSS:
• On the M29W640GH and M29W640GL, the last and first blocks are protected.
• On the M29W640GT and M29W640GB, the last two and first two boot blocks are protected.
The M29W640G devices feature a full set of fast program commands to improve programming
throughput:
• 2-byte PROGRAM (it is not necessary to raise VPP/WP# to 12V before issuing this command)
• 2 words/4-byte PROGRAM (it is not necessary to raise VPP/WP# to 12V before issuing
this command)
• 4 word/8-byte PROGRAM (VPP/WP# must be raised to 12V before issuing this command)
• WRITE TO BUFFER and PROGRAM (enables program in one shot a buffer of 16
words/32 bytes)
The M29W640G has an extra block, the extended block, of 128 words in x16 mode or 256
bytes in x8 mode that can be accessed using a dedicated command. The extended block
can be protected, and therefore, is useful for storing security information. However,
protection is not reversible; once protected, the protection cannot be undone.
The memory is delivered with all bits erased (set to 1)

                                                               2.Logic Diagram

                                                                  3.Signal Assignments

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A: Generally, we pack our goods in neutral white boxes and brown cartons.

If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters.

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A: Yes, we have 100% test and check all goods before delivery.

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Shenzhen Hongxinwei Technology Co., Ltd

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