M27W032 datasheet(4/23 Pages) STMICROELECTRONICS

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M27W032

4/23

SUMMARY DESCRIPTION

The M27W032 is a 32 Mbit (2Mb x16) non-volatile,

One Time Programmable (OTP), FlexibleROM™

Memory. Read operations can be performed using

a single low voltage (2.7 to 3.6V) supply. Program

operations require an additional VPP (11.4 to

12.6V) power supply. On power-up the memory

defaults to Read mode where it can be read in the

same way as a ROM or EPROM.

Program commands are written to the Command

Interface of the memory. An on-chip Program Con-

troller (PC) simplifies the process of programming

the memory by taking care of all of the special op-

erations that are required to update the memory

contents.

The M27W032 features an innovative command,

Multiple Word Program, used to program large

streams of data. It greatly reduces the total pro-

gramming 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 4s, compared to 18s using the standard Word

Program.

The end of a program operation can be detected

and any error conditions identified. The command

set required to control the memory is consistent

with JEDEC standards.

Chip Enable and Output Enable signals control the

bus operation of the memory. They allow simple

connection to most microprocessors, often without

additional logic.

The memory is offered in SO44 and TSOP48 (12

x 20mm) packages. The memory is supplied with

all the bits set to ’1’.

Figure 2. Logic Diagram

Table 1. Signal Names

AI05928

A0-A20

DQ0-DQ15

VCC

M27W032

VSS

VPP

A0-A20

Address Inputs

DQ0-DQ15

Data Inputs/Outputs

Chip Enable

Output Enable

VCC

Supply Voltage read

VPP

Supply Voltage program

VSS

Ground

Not Connected Internally

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