M29KW064E datasheet(4/30 Pages) STMICROELECTRONICS

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M29KW064E

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SUMMARY DESCRIPTION

The M29KW064E LightFlash™ is a 64 Mbit (4Mb

x16) non-volatile memory that can be read, erased

and reprogrammed. Read operations can be per-

formed using a single low voltage (2.7 to 3.6V)

supply. Program and Erase operations require an

additional VPP (11.4 to 12.6) power supply. 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 memory is divided into 32 uniform blocks that

can be erased independently so it is possible to

preserve valid data while old data is erased (see

Figures 2, Block Addresses). Program and Erase

commands are written to the Command Interface

of the memory. An on-chip Program/Erase Con-

troller (P/E.C.) simplifies the process of program-

ming or erasing the memory by taking care of all of

the special operations that are required to update

the memory contents.

The M29KW064E LightFlash™ features a new

command, Multiple Word Program, used to pro-

gram large streams of data. It greatly reduces the

total programming time when a large number of

Words are written to the memory at any one time.

Using this command the entire memory can be

programmed in 8s, compared to 36s using the

standard Word Program.

The end of a program or erase operation can be

detected and any error conditions identified. The

command set required to control the memory is

consistent with JEDEC standards.

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)

and TFBGA48 (6 x 9mm, 0.8mm pitch) packages.

The memory is supplied with all the bits erased

(set to ’1’).

Figure 2. Logic Diagram

Table 1. Signal Names

AI06264

A0-A21

DQ0-DQ15

VCC

M29KW064E

VSS

VPP

A0-A21

Address Inputs

DQ0-DQ15

Data Inputs/Outputs

Chip Enable

Output Enable

Write Enable

Reset

Ready/Busy Output

VCC

Supply Voltage read

VPP

Supply Voltage program erase

VSS

Ground

Not Connected Internally

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