M29W160DB データシートの表示（PDF） - STMicroelectronics

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M29W160DB

16 Mbit (2Mb x8 or 1Mb x16, Boot Block) 3V Supply Flash Memory

STMicroelectronics 

M29W160DT, M29W160DB

SUMMARY DESCRIPTION

The M29W160D is a 16 Mbit (2Mb x8 or 1Mb x16)

non-volatile memory that can be read, erased and

reprogrammed. These operations can be per-

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

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 blocks that can be

erased independently so it is possible to preserve

valid data while old data is erased. Each block can

be protected independently to prevent accidental

Program or Erase commands from modifying the

memory. Program and Erase commands are writ-

ten 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 operations that are

required to update the memory contents.

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.

The blocks in the memory are asymmetrically ar-

ranged, see Tables 2 and 3, 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),

SO44 and LFBGA48 (0.8mm pitch) packages and

it is supplied with all the bits erased (set to ’1’).

Figure 2. Logic Diagram

VCC

20

A0-A19

15

DQ0-DQ14

W

DQ15A–1

M29W160DT

E

M29W160DB

BYTE

G

RB

RP

VSS

AI03843

Note: RB not available on SO44 package.

Table 1. Signal Names

A0-A19

Address Inputs

DQ0-DQ7 Data Inputs/Outputs

DQ8-DQ14 Data Inputs/Outputs

DQ15A–1

Data Input/Output or Address Input

E

Chip Enable

G

Output Enable

W

Write Enable

RP

Reset/Block Temporary Unprotect

RB

Ready/Busy Output

(Not available on SO44 package)

BYTE

Byte/Word Organization Select

VCC

Supply Voltage

VSS

Ground

NC

Not Connected Internally

DU

Don’t Use as internally connected

5/29

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