fm3204 Ramtron Corporation, fm3204 Datasheet

fm3204

Manufacturer Part Number

fm3204

Description

Integrated Processor Companion With Memory

Manufacturer

Ramtron Corporation

Datasheet

1.FM3204.pdf (22 pages)

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Pre-Production

FM3204/16/64/256

Integrated Processor Companion with Memory

Features

High Integration Device Replaces Multiple Parts

Processor Companion

Description

The FM32xx is a family of integrated devices that

includes the most commonly needed functions for

processor-based systems. Major features include

nonvolatile memory available in various sizes, low-

lockable 64-bit serial number area, and general

purpose comparator that can be used for an early

power-fail (NMI) interrupt or other purpose. The

family operates from 2.7 to 5.5V.

The FM32xx family is software and pinout

compatible with the FM31xx family which also

includes a real-time clock. The common features

allow a system design that easily can be assembled

with or without timekeeping by simply selecting the

FM31xx or FM32xx, respectively.

Each FM32xx provides nonvolatile RAM available in

sizes including 4Kb, 16Kb, 64Kb, and 256Kb

versions. Fast write speed and unlimited endurance

allow the memory to serve as extra RAM or

conventional nonvolatile storage. This memory is

truly nonvolatile rather than battery backed.

The processor companion includes commonly needed

CPU support functions.

include a reset output signal controlled by either a

low V

active when V

This is a product in pre-production phase of development. Device

characterization is complete and Ramtron does not expect to change

the specifications. Ramtron will issue a Product Change Notice if

any specification changes are made.

Rev. 2.4

Mar. 2008

Serial Nonvolatile Memory

Low Voltage Reset

Watchdog Timer

Early Power-Fail Warning/NMI

Two 16-bit Event Counters

Serial Number with Write-lock for Security

Active-low Reset Output for V

Programmable V

Manual Reset Filtered and Debounced

Programmable Watchdog Timer

Dual Battery-backed Event Counter Tracks

System Intrusions or other Events

Comparator for Early Power-Fail Interrupt

64-bit Programmable Serial Number with Lock

reset, watchdog timer, nonvolatile event counter,

condition or a watchdog timeout. /RST goes

drops below a programmable

Reset Trip Point

Supervisory functions

and Watchdog

Ferroelectric Nonvolatile RAM

Fast Two-wire Serial Interface

Easy to Use Configurations

threshold and remains active for 100 ms after V

rises above the trip point. A programmable watchdog

timer runs from 100 ms to 3 seconds. The watchdog

timer is optional, but if enabled it will assert the reset

signal for 100 ms if not restarted by the host before

the timeout. A flag-bit indicates the source of the

reset.

A general-purpose comparator compares an external

input pin to the onboard 1.2V reference. This is

useful for generating an early warning power-fail

interrupt (NMI) but can be used for any purpose. The

family also includes a programmable 64-bit serial

number that can be locked making it unalterable.

Additionally the FM32xx offers a dual event counter

that tracks the number of rising or falling edges

detected on dedicated input pins. The counter can

optionally be battery backed and even battery

operated by attaching a backup power source to the

VBAK pin. If VBAK is connected to a battery or

capacitor, then events will be counted even in the

absence of V

4Kb, 16Kb, 64Kb, and 256Kb versions

Unlimited Read/Write Endurance

10 year Data Retention

NoDelay™ Writes

Up to 1 MHz Maximum Bus Frequency

Supports Legacy Timing for 100 kHz & 400 kHz

Device Select Pins for up to 4 Memory Devices

Companion Controlled via 2-wire Interface

Operates from 2.7 to 5.5V

Small Footprint 14-pin “Green” SOIC (-G)

Pin Compatible with FM31xx Series

Low Operating Current

-40 C to +85 C Operation

1850 Ramtron Drive, Colorado Springs, CO 80921

Ramtron International Corporation

(800) 545-FRAM, (719) 481-7000

www.ramtron.com

Page 1 of 22

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